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Network Working Group A. Farrel (Editor)
INTERNET-DRAFT Old Dog Consulting
Updates: RFC3812, RFC4802
Intended Status: Standards Track S. Yasukawa
Created: March 8, 2009 NTT
Expires: September 8, 2009
T. Nadeau
BT
Point-to-Multipoint Multiprotocol Label Switching (MPLS)
Traffic Engineering (TE) Management Information Base (MIB) module
draft-ietf-mpls-p2mp-te-mib-08.txt
Status of this Memo
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Abstract
This memo defines a portion of the Management Information Base
for use with network management protocols in the Internet community.
In particular, it describes managed objects for point-to-multipoint
(P2MP) Multiprotocol Label Switching (MPLS) based traffic engineering
(TE).
The MIB module defined in this document is applicable to P2MP MPLS-TE
by extensions to the MPLS-TE MIB module defined in RFC 3812. It is
equally applicable to P2MP Generalized MPLS (GMPLS) in association
with the GMPLS TE MIB module defined in RFC 4802.
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Table of Contents
1. Introduction .................................................. 3
2. The Internet-Standard Management Framework .................... 3
3. Feature List .................................................. 4
4. Outline ....................................................... 4
4.1. Summary of the P2MP MPLS Traffic Engineering MIB Module .. 5
4.2. Use of MPLS-TE-STD-MIB ................................... 6
4.3. Scalars ................................................. 11
4.4. mplsTeP2mpTunnelTable ................................... 11
4.5. mplsTeP2mpTunnelDestTable ............................... 11
4.6. mplsTeP2mpTunnelBranchPerfTable ......................... 11
4.7. Relationships Between MIB Tables ........................ 12
5. Using the P2MP MPLS-TE MIB Module ............................ 13
5.1. Example Use of the P2MP MPLS-TE MIB Module .............. 13
5.2. Example Transit LSR Inspection .......................... 19
6. Managing P2MP MPLS-TE LSPs Through the LSR MIB Module ........ 25
6.1. Example Use of the LSR MIB Module ....................... 26
7. MPLS Traffic Engineering P2MP MIB Definitions ................ 29
8. Security Considerations ...................................... 56
9. Acknowledgments .............................................. 58
10. IANA Considerations .......................................... 58
10.1. IANA Considerations for MPLS-TE-P2MP-STD-MIB ............ 58
11. References ................................................... 58
11.1. Normative References .................................... 58
11.2. Informative References .................................. 59
12. Authors' Addresses ........................................... 60
13. Intellectual Property ........................................ 60
14. Disclaimer of Validity ....................................... 61
15. Full Copyright Statement ..................................... 61
0. Changes Since Previous Revision
[This section to be removed before publication as an RFC.]
- Clarify how entries in the mplsXCTable are used to hold the set of
XC definitions for one P2MP LSP, and add an index pointer from
mplsTeP2mpTunnelTable into mplsXCTable. Affects Sections 4.2,
4.2.1, 4.2.2, 4.7, 5.1, 5.2, 6.1, and 7. The new index pointer is
called mplsTeP2mpTunnelP2mpXcIndex.
- Make it possible for a single P2MP tunnel instance (LSP ID) to
have more than one sub-group ID received from upstream. Make the
subgroup ID an index to mplsTeP2mpTunnelDestTable.
- Move source sub-group objects from mplsTeP2mpTunnelTable to
mplsTeP2mpTunnelDestTable and make them indexes.
- Typos.
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1. Introduction
This memo defines a portion of the Management Information Base (MIB)
for use with network management protocols in the Internet community.
In particular, it describes managed objects for modeling
point-to-multipoint (P2MP) Multiprotocol Label Switching (MPLS)
traffic engineering (TE).
MPLS is defined in [RFC3031] and a signaling protocol for
point-to-point (P2P) MPLS-TE (TE extensions to the Resource
Reservation Protocol - RSVP-TE) is defined in [RFC3209]. RSVP-TE is
extended for use in a P2MP environment by [RFC4875] following the
requirements set out in [RFC4461].
[RFC3812] provides a MIB module for modeling and controlling P2P
MPLS-TE in conjunction with Textual Conventions defined in [RFC3811].
In addition, [RFC3813] defines a MIB module for modeling and
controlling an MPLS Label Switching Router (LSR) that may support
MPLS-TE. An overview of MPLS MIB modules can be found in [RFC4221].
This document defines a MIB module for managing and controlling P2MP
MPLS-TE. It builds on the objects and tables defined in [RFC3812] so
that P2MP MPLS-TE management is an extension of P2P MPLS-TE
management.
In addition, this document provides a description of how to use the
LSR MIB module [RFC3813] to model and control an LSR that supports
P2MP MPLS-TE.
The MIB module defined in this document and the usage of the LSR MIB
module are equally applicable to Generalized MPLS (GMPLS) in
association with the GMPLS TE MIB module defined in [RFC4802] and the
GMPLS LSR MIB module defined in [RFC4803].
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in BCP 14, RFC 2119
[RFC2119].
2. The Internet-Standard Management Framework
For a detailed overview of the documents that describe the current
Internet-Standard Management Framework, please refer to section 7 of
RFC 3410 [RFC3410].
Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. MIB objects are generally
accessed through the Simple Network Management Protocol (SNMP).
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Objects in the MIB are defined using the mechanisms defined in the
Structure of Management Information (SMI). This memo specifies a MIB
module that is compliant to the SMIv2, which is described in STD 58,
RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
[RFC2580].
3. Feature List
The feature list for this MIB module is built on the feature list for
the P2P MPLS-TE MIB module [RFC3812]. The features in the list below
are marked with a star (*) if they are new features for this MIB
module and with a circle (o) if they are satisfied by [RFC3812].
* The MIB module supports configuration of point-to-multipoint
unidirectional tunnels.
o MPLS tunnels need not be interfaces, but it is possible to
configure a tunnel as an interface.
o The MIB module supports tunnel establishment via an MPLS
signaling protocol wherein the tunnel parameters are specified
using this MIB module at the head end of the LSP, and end-to-end
tunnel LSP establishment is accomplished via signaling. The MIB
module also supports manually configured tunnels, i.e., those for
which label associations at each hop of the tunnel LSP are
provisioned by the administrator via the LSR MIB [RFC3813].
o The MIB module supports persistent, as well as non-persistent
tunnels.
4. Outline
Point-to-point MPLS-TE utilizes MPLS tunnels running from source to
destination. Each tunnel is supported by one or more label switched
paths (LSPs). This is described in the signaling specification
[RFC3209] and the document that describes the MPLS-TE MIB module
[RFC3812].
P2MP MPLS-TE requires that MPLS tunnels are established from a single
source point (the root) to one or more destination points (the
leaves). P2MP MPLS-TE tunnels are also supported by one or more P2MP
LSPs.
This document models a P2MP LSP as a set of source-to-leaf (S2L) sub-
LSPs. That is, the path (or route) from the root to each leaf is
separately specified for each leaf as a series of loose or strict
hops. The combination (overlay) of the set of S2L LSPs results in the
P2MP TE LSP. See [RFC4875] for a more detailed description of S2L
LSPs and how they are combined to form a P2MP TE LSP.
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Other configuration parameters associated with a P2MP MPLS-TE LSP
describe the forwarding behavior of each LSR along the path of the
LSP. It should be noted that, according to [RFC4461], these
configuration parameters are invariant across the branches of a P2MP
LSP toward different leaves. Thus, they can be configured for whole
P2MP LSP, and do not need to be configured per leaf.
The setup of P2MP tunnels can be achieved as:
- Management actions only, by using [RFC3813] to configure cross-
connections or forwarding state at the LSRs along the path of the
tunnel. See Section 6 for more details.
- Control plane actions (i.e., signaling using [RFC4875]) under the
direction of a management process, by using [RFC3812] and the MIB
module defined in this document.
- Control plane actions ([RFC4875]) under the direction of some other
management process, and monitored using [RFC3812] and the MIB
module defined in this document.
Note that [RFC4802] defines a MIB module that can be used to manage
and model Generalized MPLS (GMPLS) LSPs - it is a series of MIB
objects and tables some of which extend tables in MPLS-TE-STD-MIB
[RFC3812]. [RFC4461] and [RFC4875] are clear that they apply to
MPLS-TE [RFC3031] and GMPLS [RFC3945]. This document describes a MIB
module that can be used for both MPLS-TE and GMPLS P2MP LSPs, and all
objects apply to both MPLS and GMPLS. Note, however, that GMPLS
defines support for unidirectional and bidirectional LSP, while P2MP
LSPs can only be unidirectional. Thus, the gmplsTunnelDirection
object of GMPLS-TE-STD-MIB defined in [RFC4802] MUST be set to
forward(0) when the LSP is a P2MP LSP.
The following sections describe the components of the P2MP MPLS-TE
MIB module. The subsequent section provides an explanation and
example of how the P2MP MPLS-TE MIB module can be used to configure
and manage a P2MP tunnel when used in combination with the MPLS-TE
MIB module defined in [RFC3812]. A further section describes how P2MP
tunnels can be managed solely through the LSR MIB module defined in
[RFC3813], and gives an example.
4.1. Summary of the P2MP MPLS Traffic Engineering MIB Module
The MIB module consists of the following objects and tables:
- The P2MP Tunnel table (mplsTeP2mpTunnelTable) sparse augments the
MPLS-TE Tunnel table (mplsTunnelTable) and is used to set up and
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monitor P2MP MPLS-TE tunnels.
- The P2MP Tunnel Destination table (mplsTeP2mpTunnelDestTable) lists
the destinations (leaves) of each P2MP MPLS-TE tunnel, provides the
status of the tunnel to each destination, and supplies pointers
into the configured hop table, actual route hop table, and computed
hop table (mplsTunnelHopTable, mplsTunnelARHopTable, and
mplsTunnelCHopTable) for the routes to each of the destinations.
- A small collection of scalars (mplsTeP2mpTunnelConfigured,
mplsTeP2mpTunnelActive, and mplsTeP2mpTunnelTotalMaxHops) give
information about the P2MP behavior of the LSR.
These tables and scalars are described in the following sections
after a description of how the MPLS-TE-STD-MIB module [RFC3812] is
used as a basis for MIB management and modeling of P2MP MPLS-TE.
4.2. Use of MPLS-TE-STD-MIB
The MIB module defined in this document builds on the objects and
tables of MPLS-TE-STD-MIB defined in [RFC3812]. That is, most of the
basic properties of the MPLS tunnel are modeled and managed by
objects in MPLS-TE-STD-MIB, and new objects are only defined within
this document where additional features or different behavior is
required.
When an MPLS-TE tunnel is a P2MP tunnel, certain objects in the
mplsTunnelTable have new meanings just as the signaling objects in
RSVP-TE [RFC3209] have different meanings when the signaling messages
are used to establish P2MP LSPs [RFC4875].
As indicated in the next section, the presence of a conceptual row in
the mplsTeP2mpTunnelTable of the MIB module defined in this document
shows that a tunnel defined in the corresponding conceptual row of
the mplsTunnelTable of MPLS-TE-STD-MIB is a P2MP tunnel. Under those
circumstances the following scalars and objects from the appropriate
conceptual rows in MPLS-TE-STD-MIB MUST be interpreted as follows.
The text below is supplementary to the Description clauses in
[RFC3812].
mplsTunnelMaxHops
This object continues to refer to the maximum number of hops that
can be configured to a single destination for a tunnel on this
device. Thus, for a P2MP tunnel, this refers to the maximum number
of hops that can be configured on this device to any individual
destination of the tunnel.
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A new object, mplsTeP2mpTunnelTotalMaxHops, is defined in this MIB
module to supply the total number of hops across all destinations
of a P2MP tunnel. mplsTeP2mpTunnelTotalMaxHops would normally be
set larger than or equal to mplsTunnelMaxHops.
mplsTunnelEgressLSRId
This object continues to map to the field in the RSVP-TE Session
Object that occupies the space used by the IPv4 Tunnel Endpoint
Address [RFC3209], but for a P2MP tunnel, this object does not
identify an address of the egress of the tunnel. Instead it
contains the P2MP ID value that identifies the identifier of the
set of destinations for the P2MP tunnel and is carried in the P2MP
Session Object [RFC4875]. The Description clause for this object
can be read as follows.
"Identity of the egress LSR associated with this tunnel
instance.
When an entry in the mplsTeP2mpTunnelTable is present
corresponding to this entry in the mplsTunnelTable, this
object contains the P2MP ID that identifies the set of
destinations of this tunnel and that is signaled in the
P2MP ID field of the P2MP Session Object if the MPLS
signaling protocol for this tunnel indicated by
mplsTunnelSignallingProto in MPLS-TE-STD-MIB is rsvp(2)."
The destinations of the P2MP tunnel are found in the new
mplsTeP2mpTunnelDestTable.
mplsTunnelXCPointer
If the tunnel is a P2MP tunnel as indicated by the presence of an
entry in the mplsTeP2mpTunnelTable corresponding to this tunnel,
this object is not used. This is because there is not necessarily
a single entry in the mplsXCTable corresponding to the cross-
connect for the LSP. Instead, the mplsXCTable entries for the LSP
are found using the mplsXCIndex set to mplsTeP2mpTunnelP2mpXcIndex
from the mplsTeP2mpTunnelTable; all mplsXCTable entries for the
same P2MP LSP share a common value of mplsXCIndex.
If this object is present for a P2MP tunnel, it SHOULD contain the
value 0.0.
mplsTunnelHopTableIndex
If the tunnel is a P2MP tunnel as indicated by the presence of an
entry in the mplsTeP2mpTunnelTable corresponding to this tunnel,
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this object is not used. This is because the destinations and
paths to those destinations are found in the
mplsTeP2mpTunnelDestTable.
If this object is present for a P2MP tunnel, it SHOULD contain the
value 0.
mplsTunnelPathInUse
If the tunnel is a P2MP tunnel as indicated by the presence of an
entry in the mplsTeP2mpTunnelTable corresponding to this tunnel,
this object is not used. This is because the destinations and
paths to those destinations are found in the
mplsTeP2mpTunnelDestTable.
If this object is present for a P2MP tunnel, it SHOULD contain the
value 0.
mplsTunnelARHopTableIndex
If the tunnel is a P2MP tunnel as indicated by the presence of an
entry in the mplsTeP2mpTunnelTable corresponding to this tunnel,
this object is not used. This is because the destinations and
paths to those destinations are found in the
mplsTeP2mpTunnelDestTable.
If this object is present for a P2MP tunnel, it SHOULD contain the
value 0.
mplsTunnelCHopTableIndex
If the tunnel is a P2MP tunnel as indicated by the presence of an
entry in the mplsTeP2mpTunnelTable corresponding to this tunnel,
this object is not used. This is because the destinations and
paths to those destinations are found in the
mplsTeP2mpTunnelDestTable.
If this object is present for a P2MP tunnel, it SHOULD contain the
value 0.
4.2.1. Backward Compatiblity Concerns for MIB Read Operations
A concern may be raised with regard to the changed semantics of the
objects listed in Section 4.2 within the MPLS-TE-STD-MIB module. What
would happen if an implementation that was not P2MP-aware attempted
to read from the MPLS-TE-STD-MIB module and encountered these objects
with changed semantics? Would it attempt to handle a P2MP LSP as a
P2P LSP, and would this potentially cause damage to the
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implementation?
To clarify the situation, each of the objects with modified semantics
is set out below. The term 'legacy system' is used to refer to a
management station that is not aware of the P2MP-TE-STD-MIB and is
not aware of the modified sematics of these objects.
mplsTunnelMaxHops
If examined by a legacy system, this object will be correctly
interpreted as it continues to refer to the number of hops to any
single destination. A legacy system will look to this object to
determine how many hops it may insert into the path of a P2P LSP,
and it will get the correct result from this object.
mplsTunnelEgressLSRId
This object reflects the value used in the signaling protocol in
the Session Object. Although the precise semantic of the field is
different in P2P and P2MP signaling, the use of the field as part
of the tuple that identifies the LSP is unchanged.
If a P2MP tunnel is examined by a legacy system, this object will
be correctly interpreted as the same size and format, and will be
used to identify the LSP. This will not impact the operation of
the legacy system.
mplsTunnelXCPointer
If a P2MP tunnel is examined by a legacy system, this object will
report 0.0 giving the impression that no cross-connect entry has
been set up for the LSP yet. This will not impact the operation of
the legacy system.
mplsTunnelHopTableIndex
If a P2MP tunnel is examined by a legacy system, this object will
report zero giving the impression that no tunnel hops have been
configured. This will not impact the operation of the legacy
system.
mplsTunnelPathInUse
If a P2MP tunnel is examined by a legacy system, this object will
report zero giving the impression that no path is in use or
available. This will not impact the operation of the legacy
system.
mplsTunnelARHopTableIndex
If a P2MP tunnel is examined by a legacy system, this object will
report zero giving the impression that no tunnel hops have been
reported by the signaling protocol. This is a valid scenario and
will not impact the operation of the legacy system.
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mplsTunnelCHopTableIndex
If a P2MP tunnel is examined by a legacy system, this object will
report zero giving the impression that no tunnel hops have been
computed. This is a valid scenario and will not impact the
operation of the legacy system.
4.2.2. Backward Compatiblity Concerns for MIB Write Operations
Although a legacy system may be able to read objects in the
MPLS-TE-STD-MIB which have modified semantics and operate correctly,
there is also a concern that the legacy system might try to write to
these objects, thus modifying the P2MP LSP in an unexpected way.
This section lists the objects with modified semantics and explains
how each is safe against write access by a legacy system.
mplsTunnelMaxHops
If set by a legacy system, this object will correctly control the
maximum number of hops in an LSP to a single destination as
expected by the legacy system.
mplsTunnelEgressLSRId
A legacy system that was used to modify this object for a P2MP
tunnel would be successful and would not damage the operation of
the P2MP tunnel. All that would happen is that the identity of the
tunnel would be changed.
mplsTunnelXCPointer
If this object is set for a P2MP tunnel by a legacy system, the SET
will be successful, but the value (i.e. the object) will be ignored
by the management agent and the object will not be used.
mplsTunnelHopTableIndex
If this object is set for a P2MP tunnel by a legacy system, the SET
will be successful, but the value (i.e. the object) will be ignored
by the management agent and the object will not be used.
mplsTunnelPathInUse
If this object is set for a P2MP tunnel by a legacy system, the SET
will be successful, but the value (i.e. the object) will be ignored
by the management agent and the object will not be used.
mplsTunnelARHopTableIndex
This object is read-only and cannot be set.
mplsTunnelCHopTableIndex
This object is read-only and cannot be set.
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4.3. Scalars
There are three scalars defined for this MIB module.
mplsTeP2mpTunnelConfigured provides a read-only counter of the number
of P2MP MPLS-TE tunnels that are configured on this LSR through this
MIB module.
mplsTeP2mpTunnelActive provides a read-only counter of the number of
P2MP MPLS-TE tunnels configured on this LSR through this MIB module
that are currently active.
As described in Section 4.2, mplsTeP2mpTunnelTotalMaxHops is a read-
only scalar that reports the maximum number of explicit route hops
supported by this LSR for any single P2MP LSP configured or monitored
through this MIB module. mplsTeP2mpTunnelTotalMaxHops would normally
be set larger than or equal to mplsTunnelMaxHops.
4.4. mplsTeP2mpTunnelTable
The mplsTeP2mpTunnelTable extends (through a sparse augmentation) the
MPLS Tunnel table (mplsTunnelTable) from MPLS-TE-STD-MIB [RFC3812] to
allow P2MP MPLS-TE tunnels to be created, controlled, and monitored
at any LSR in the network.
A P2MP MPLS-TE tunnel may be represented in the MIB, by defining it
in the mplsTunnelTable and providing objects in this table to
indicate that it is a P2MP tunnel and to define P2MP-specific
properties of the tunnel.
4.5. mplsTeP2mpTunnelDestTable
P2MP LSPs have multiple destinations and, although the LSP parameters
(such as bandwidth) for each destination are the same, the explicit
route requested, computed, and signaled is different for each
destination. The mplsTeP2mpTunnelDestTable encodes each destination
and the information specific to the LSP to that destination.
mplsTeP2mpTunnelDestTable is indexed by a set of parameters that
identify the P2MP LSP itself (tunnel index, tunnel instance, ingress
LSR ID, egress LSR ID), the P2MP incoming and outgoing sub-groups
(sub-group origin, sub-group ID), and the destination ID (i.e., a
leaf).
4.6. mplsTeP2mpTunnelBranchPerfTable
Per-tunnel statistics are counted in mplsTunnelPerfTable in
MPLS-TE-STD-MIB [RFC3812], but these objects are only partially
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useful for a P2MP tunnel. The five objects in that table
(mplsTunnelPerfPackets, mplsTunnelPerfHCPackets,
mplsTunnelPerfErrors, mplsTunnelPerfBytes, and mplsTunnelPerfHCBytes)
continue to be used for tunnels that forward packets, and reflect
the counts of data received on the incoming interfaces and forwarded
to the downstream interfaces.
However, in a P2MP tunnel, the downstream interfaces (out-segments)
may behave differently and so it is appropriate to record the
performance on each out-going branch. This is achieved through the
mplsTeP2mpTunnelBranchPerfTable which is indexed by the tunnel
identifiers and by the same identifier of the branch as is used in
mplsTeP2mpTunnelDestTable.
4.7. Relationships Between MIB Tables
This section provides a diagramatic representation of the
relationships between MIB tables defined in this document as part of
MPLS-TE-P2MP-STD-MIB, and the tables defined in MPLS-TE-STD-MIB in
[RFC3812] and MPLS-LSR-STD-MIB in [RFC3813]. The dependencies
between the various pre-existing MPLS-TE and LSR MIB tables can be
seen in [RFC4221].
An arrow in the figure shows that the MIB table pointed from contains
a reference to the MIB table pointed to.
mplsTunnelPerfTable
^
|
v
mplsTunnelTable-------->mplsTeP2mpTunnelTable
^ | | |
| | | |
| | v |
| +------->mplsXCTable--+ v
v | mplsTeP2mpTunnelDestTable
mplsTunnelResourceTable | | | |
^ | | | +--->mplsTunnelHopTable
| | | | +--->mplsTunnelCHopTable
mplsInSegmentTable<-----------+ | | +--->mplsTunnelARHopTable
| | |
v | |
mplsOutSegmentTable<---+ |
v
mplsTeP2mpTunnelBranchPerfTable
Figure 1 : Dependencies Between MIB Tables
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5. Using the P2MP MPLS-TE MIB Module
This section describes how to use the P2MP MPLS-TE MIB module defined
in this document to manage and model P2MP MPLS-TE LSPs. A subsection
gives an example of usage.
A P2MP MPLS-TE LSP is modeled as a single LSP tunnel. That is, there
is a single entry in the mplsTunnelTable of the MPLS-TE-STD-MIB
defined in [RFC3812] for each instance of a P2MP LSP tunnel. As
described in Section 4.2, certain of the objects in an entry in the
mplsTunnelTable are not valid or have special meanings when the entry
is used for a P2MP LSP tunnel.
When the MIB modules are used to configure a P2MP MPLS-TE LSP, an
entry is first created in the mplsTunnelTable, and then corresponding
entries are created in the mplsTeP2mpTunnelTable and the
mplsTeP2mpTunnelDestTable from the MPLS-TE-P2MP-STD-MIB module
defined in this document. The presence of a corresponding entry in
the mplsTeP2mpTunnelTable indicates that an entry in the
mplsTunnelTable relates to a P2MP not a P2P MPLS-TE LSP. Thus, the
mplsTunnelAdminStatus object should not be set to up(1) until the
entries in the mplsTeP2mpTunnelTable and the
mplsTeP2mpTunnelDestTable have been completed.
5.1. Example Use of the P2MP MPLS-TE MIB Module
This section contains an example of the use of objects in
MPLS-TE-STD-MIB and MPLS-TE-P2MP-STD-MIB to create a P2MP MPLS-TE
LSP. Note that the objects described should be created on the
"head-end" LSR.
The RowStatus values shown in this section are those to be used in
the set request, typically createAndGo(4) which is used to create the
conceptual row and have its status immediately set to active. A
subsequent retrieval operation on the conceptual row will return a
different value, such as active(1). Please see [RFC2579] for a
detailed discussion on the use of RowStatus.
Figure 2 shows the simple topology of the prospective LSP from its
root at LSR R, through a branch node at LSR B, to its two
destinations, LSRs D1 and D2.
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C1---D1
/
/
R---A---B
\
\
C2---D2
Figure 2 : Topology of a simple P2MP MPLS-TE LSP
Let us assign IP addresses to the LSRs as follows:
R 192.0.2.1
A 192.0.2.9
B 192.0.2.17
C1 192.0.2.33
C2 192.0.2.34
D1 192.0.2.65
D2 192.0.2.66
Step 1 - Define the resource requirements for the LSP
Let us assume that we require a best effort LSP.
In mplsTunnelResourceTable define as follows:
{
mplsTunnelResourceIndex = 9,
mplsTunnelResourceMaxRate = 0,
mplsTunnelResourceMeanRate = 0,
mplsTunnelResourceMaxBurstSize = 0,
mplsTunnelResourceMeanBurstSize = 0,
mplsTunnelResourceExBurstSize = 0,
mplsTunnelResourceExBurstSize = unspecified(1),
mplsTunnelResourceWeight = 0,
mplsTunnelResourceRowStatus = createAndGo(4)
}
Step 2 - Define the core parameters for the LSP tunnel.
In mplsTunnelTable define as follows:
{
mplsTunnelIndex = 4,
mplsTunnelInstance = 0,
mplsTunnelIngressLSRId = "192.0.2.1",
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-- The tunnel egress LSR ID is used to
-- hold the P2MP ID for the P2MP LSP tunnel
mplsTunnelEgressLSRId = 328,
mplsTunnelName = "My first P2MP tunnel",
mplsTunnelDescr = "Here to there and there",
mplsTunnelIsIf = true(1),
-- The XC pointer is not used for P2MP LSPs
mplsTunnelXCPointer = 0.0,
-- This table entry is created by configuration not signaling
mplsTunnelSignallingProto = rsvp(2),
mplsTunnelSetupPrio = 0,
mplsTunnelHoldingPrio = 7,
mplsTunnelSessionAttributes = 0,
mplsTunnelLocalProtectInUse = false(2),
mplsTunnelResourcePointer = mplsTunnelResourceMaxRate.9,
mplsTunnelInstancePriority = 1,
-- The index to the mplsTunnelHopTable from this table
-- is not used
mplsTunnelHopTableIndex = 0,
mplsTunnelIncludeAnyAffinity = 0,
mplsTunnelIncludeAllAffinity = 0,
mplsTunnelExcludeAnyAffinity = 0,
mplsTunnelPathInUse = 0,
mplsTunnelRole = head(1),
-- Tunnel is not ready for admin status up
mplsAdminStatus = down(2),
mplsTunnelRowStatus = createAndGo(4)
}
Note that any active or signaled instances of the above tunnel
would appear with the same primary mplsTunnelIndex, but would have
values greater than 0 for mplsTunnelInstance.
Step 3 - Create the P2MP Tunnel
In mplsTeP2mpTunnelTable define as follows:
{
mplsTeP2mpTunnelP2mpIntegrity = true(1),
-- This is the head end of the LSP and not a branch
mplsTeP2mpTunnelBranchRole = notBranch(1),
-- There is no XC set up yet
mplsTeP2mpTunnelP2mpXcIndex = 0
mplsTeP2mpTunnelRowStatus = createAndGo(4)
}
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Step 4 - Create the configured explicit routes for the LSP
Two pieces of explicit path are required. The first runs from R to
D1, and the second from B to D2. See [RFC4875] for a discussion of
the construction of explicit routes for P2MP MPLS-TE LSPs.
In mplsTunnelHopTable define as follows:
{
mplsTunnelHopListIndex = 1,
mplsTunnelPathOptionIndex = 1,
mplsTunnelHopIndex = 1,
mplsTunnelHopAddrType = ipv4(1),
mplsTunnelHopIpAddr = "192.0.2.9",
mplsTunnelHopIpPrefixLen = 32,
mplsTunnelHopType = strict(2),
mplsTunnelHopInclude = true(1),
mplsTunnelHopPathOptionName = "Here to there",
mplsTunnelHopEntryPathComp = explicit(2),
mplsTunnelHopRowStatus = createAndGo(4)
}
{
mplsTunnelHopListIndex = 1,
mplsTunnelPathOptionIndex = 1,
mplsTunnelHopIndex = 2,
mplsTunnelHopAddrType = ipv4(1),
mplsTunnelHopIpAddr = "192.0.2.17",
mplsTunnelHopIpPrefixLen = 32,
mplsTunnelHopType = strict(2),
mplsTunnelHopInclude = true(1),
mplsTunnelHopPathOptionName = "Here to there",
mplsTunnelHopEntryPathComp = explicit(2),
mplsTunnelHopRowStatus = createAndGo(4)
}
{
mplsTunnelHopListIndex = 1,
mplsTunnelPathOptionIndex = 1,
mplsTunnelHopIndex = 3,
mplsTunnelHopAddrType = ipv4(1),
mplsTunnelHopIpAddr = "192.0.2.33",
mplsTunnelHopIpPrefixLen = 32,
mplsTunnelHopType = strict(2),
mplsTunnelHopInclude = true(1),
mplsTunnelHopPathOptionName = "Here to there",
mplsTunnelHopEntryPathComp = explicit(2),
mplsTunnelHopRowStatus = createAndGo(4)
}
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{
mplsTunnelHopListIndex = 1,
mplsTunnelPathOptionIndex = 1,
mplsTunnelHopIndex = 4,
mplsTunnelHopAddrType = ipv4(1),
mplsTunnelHopIpAddr = "192.0.2.65",
mplsTunnelHopIpPrefixLen = 32,
mplsTunnelHopType = strict(2),
mplsTunnelHopInclude = true(1),
mplsTunnelHopPathOptionName = "Here to there",
mplsTunnelHopEntryPathComp = explicit(2),
mplsTunnelHopRowStatus = createAndGo(4)
}
{
mplsTunnelHopListIndex = 2,
mplsTunnelPathOptionIndex = 1,
mplsTunnelHopIndex = 1,
mplsTunnelHopAddrType = ipv4(1),
mplsTunnelHopIpAddr = "192.0.2.17",
mplsTunnelHopIpPrefixLen = 32,
mplsTunnelHopType = strict(2),
mplsTunnelHopInclude = true(1),
mplsTunnelHopPathOptionName = "Here to there",
mplsTunnelHopEntryPathComp = explicit(2),
mplsTunnelHopRowStatus = createAndGo(4)
}
{
mplsTunnelHopListIndex = 2,
mplsTunnelPathOptionIndex = 1,
mplsTunnelHopIndex = 2,
mplsTunnelHopAddrType = ipv4(1),
mplsTunnelHopIpAddr = "192.0.2.34",
mplsTunnelHopIpPrefixLen = 32,
mplsTunnelHopType = strict(2),
mplsTunnelHopInclude = true(1),
mplsTunnelHopPathOptionName = "Here to there",
mplsTunnelHopEntryPathComp = explicit(2),
mplsTunnelHopRowStatus = createAndGo(4)
}
{
mplsTunnelHopListIndex = 2,
mplsTunnelPathOptionIndex = 1,
mplsTunnelHopIndex = 3,
mplsTunnelHopAddrType = ipv4(1),
mplsTunnelHopIpAddr = "192.0.2.66",
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mplsTunnelHopIpPrefixLen = 32,
mplsTunnelHopType = strict(2),
mplsTunnelHopInclude = true(1),
mplsTunnelHopPathOptionName = "Here to there",
mplsTunnelHopEntryPathComp = explicit(2),
mplsTunnelHopRowStatus = createAndGo(4)
}
Step 5 - Create the destinations for the P2MP LSP tunnel
In mplsTeP2mpTunnelDestTable define as follows:
{
mplsTeP2mpTunnelDestSrcSubGroupOriginType = ipv4(1),
mplsTeP2mpTunnelDestSrcSubGroupOrigin = "192.0.2.1",
mplsTeP2mpTunnelDestSrcSubGroupID = 132,
mplsTeP2mpTunnelDestSubGroupOriginType = unknown(0),
mplsTeP2mpTunnelDestSubGroupOrigin = "",
mplsTeP2mpTunnelDestSubGroupID = 0,
mplsTeP2mpTunnelDestDestinationType = ipv4(1),
mplsTeP2mpTunnelDestDestination = "192.0.2.65",
mplsTeP2mpTunnelDestHopTableIndex = 1,
mplsTeP2mpTunnelDestPathInUse = 1,
mplsTeP2mpTunnelDestAdminStatus = up(1),
mplsTeP2mpTunnelDestRowStatus = createAndGo(4)
}
{
mplsTeP2mpTunnelDestSrcSubGroupOriginType = ipv4(1),
mplsTeP2mpTunnelDestSrcSubGroupOrigin = "192.0.2.1",
mplsTeP2mpTunnelDestSrcSubGroupID = 132,
mplsTeP2mpTunnelDestSubGroupOriginType = ipv4(1),
mplsTeP2mpTunnelDestSubGroupOrigin = "192.0.2.1",
mplsTeP2mpTunnelDestSubGroupID = 132,
mplsTeP2mpTunnelDestDestinationType = ipv4(1),
mplsTeP2mpTunnelDestDestination = "192.0.2.66",
mplsTeP2mpTunnelDestHopTableIndex = 2,
mplsTeP2mpTunnelDestPathInUse = 1,
mplsTeP2mpTunnelDestAdminStatus = up(1),
mplsTeP2mpTunnelDestRowStatus = createAndGo(4)
}
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Step 6 - Activate the tunnel
In mplsTunnelTable define as follows:
{
mplsTunnelIndex = 4,
mplsTunnelInstance = 0,
mplsTunnelIngressLSRId = "192.0.2.1",
mplsTunnelEgressLSRId = 328,
-- Activate the tunnel
mplsAdminStatus = up(1)
}
5.2. Example Transit LSR Inspection
The MPLS-TE-P2MP-STD-MIB module can be used at the head end of a P2MP
LSP to configure, manage, and monitor the LSP. This is described in
Section 5.1.
The MIB module may also be used to monitor P2MP LSPs at transit and
egress LSRs. Although many objects in the MIB module are writeable,
as with MPLS-TE-STD-MIB, those objects are not normally implemented
as writeable except at the head end LSRs.
This section provides a simple example of the use of the P2MP MPLS-TE
MIB module at a transit LSR where the module is used to inspect the
LSPs. The example uses the topology shown in Figure 2 and the LSP set
out in Section 5.1. Consider the situation at LSR B in the figure.
LSR B will receive a single Path message from LSR A (or two separate
Path messages depending on implementation - see [RFC4875]) and will
send a Path message onwards to LSRs C1 and C2. Similarly, LSR B will
receive Resv messages from LSRs C1 and C2, and will send a Resv (or
two Resv messages according to implementation - see [RFC4875]) to LSR
A. Once the LSP has been set up and the signaling protocol has
reached a stable state, the tables in the MPLS-TE-STD-MIB and
MPLS-TE-P2MP-STD-MIB can be read as follows.
An entry in mplsTunnelTable provides the base information for the
P2MP tunnel.
{
mplsTunnelIndex = Path.Session.TunnelID
mplsTunnelInstance = Path.SenderTemplate.LSP_ID
mplsTunnelIngressLSRId = Path.Session.ExtendedTunnelID
mplsTunnelEgressLSRId = Path.Session.P2MPID
mplsTunnelName = Path.SessionAttribute.SessionName
mplsTunnelDescr = absent ("") or autogenerated
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mplsTunnelIsIf = false(2)
mplsTunnelIfIndex = 0
mplsTunnelOwner = rsvpTe(6)
mplsTunnelRole = transit(2) or tail(3)
mplsTunnelXCPointer = absent or 0.0 Not used for P2MP LSP
mplsTunnelSignallingProto = rsvp(2)
mplsTunnelSetupPrio = Path.SessionAttribute.SetupPr
mplsTunnelHoldingPrio = Path.SessionAttribute.HoldPr
mplsTunnelSessionAttributes = Path.SessionAttribute.Flags
mplsTunnelLocalProtectInUse = Resv.RecordRoute.Flags
mplsTunnelResourcePointer = points to the traffic parameter
specification for this tunnel
mplsTunnelPrimaryInstance = mplsTunnelInstance
mplsTunnelInstancePriority = 0
mplsTunnelHopTableIndex = 0
mplsTunnelPathInUse = 0
mplsTunnelARHopTableIndex = 0
mplsTunnelCHopTableIndex = 0
mplsTunnelIncludeAnyAffinity= Path.SeesionAttribute.IncludeAny
mplsTunnelIncludeAllAffinity= Path.SeesionAttribute.IncludeAll
mplsTunnelExcludeAnyAffinity= Path.SeesionAttribute.ExcludeAny
mplsTunnelTotalUpTime = time since Resv sent
mplsTunnelInstanceUpTime = time since Resv sent
mplsTunnelPrimaryUpTime = time since Resv sent
mplsTunnelPathChanges = 0
mplsTunnelLastPathChange = time since Resv sent
mplsTunnelCreationTime = time since Resv sent
mplsTunnelStateTransitions = 1
mplsTunnelAdminStatus = up(1)
mplsTunnelOperStatus = up(1)
mplsTunnelRowStatus = active(1)
mplsTunnelStorageType = volatile(2)
}
An entry in mplsTeP2mpTunnelTable indicates that the tunnel is a P2MP
tunnel, and provides the parameters specific to its P2MP nature. The
index objects (mplsTunnelIndex, mplsTunnelInstance,
mplsTunnelIngressLSRId, and mplsTunnelEgressLSRId) are identical in
value to the entry in the mplsTunnelTable.
{
mplsTeP2mpTunnelP2mpIntegrity = Path.LSPAttributes.Flags
mplsTeP2mpTunnelBranchRole = branch(2)
mplsTeP2mpTunnelP2mpXcIndex = index into mplsXCTable
mplsTeP2mpTunnelRowStatus = active(1)
mplsTeP2mpTunnelStorageType = volatile(2)
}
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Two entries are required in the mplsTeP2mpTunnelDestTable. Index
values of the mplsTeP2mpTunnelDestSubGroupID object will have been
assigned automatically and will not have been generated by reading
the mplsTeP2mpTunnelSubGroupIDNext object. Other index values
(mplsTunnelIndex, mplsTunnelInstance, mplsTunnelIngressLSRId, and
mplsTunnelEgressLSRId) are identical in value to those in the entry
in the mplsTunnelTable and the mplsTeP2mpTunnelTable. The remaining
index values are determined from the local LSR's address and the
destinations of the P2MP tunnel.
{
mplsTeP2mpTunnelDestSrcSubGroupOriginType = ipv4(1)
mplsTeP2mpTunnelDestSrcSubGroupOrigin =
Path.SenderTemplate.SubGpOrigin
mplsTeP2mpTunnelDestSrcSubGroupID =
Path.SenderTemplate.SubGpID
mplsTeP2mpTunnelDestSubGroupOriginType = ipv4(1)
mplsTeP2mpTunnelDestSubGroupOrigin = "192.0.2.17"
mplsTeP2mpTunnelDestSubGroupID = 1
mplsTeP2mpTunnelDestDestinationType = ipv4(1)
mplsTeP2mpTunnelDestDestination = "192.0.2.65"
mplsTeP2mpTunnelDestBranchOutSegment =
index into mplsOutSegmentTable
mplsTeP2mpTunnelDestHopTableIndex =
index into the mplsTunnelHopTable
mplsTeP2mpTunnelDestPathInUse = 1
mplsTeP2mpTunnelDestCHopTableIndex =
index into the mplsTunnelCHopTable
mplsTeP2mpTunnelDestARHopTableIndex =
index into the mplsTunnelARHopTable
mplsTeP2mpTunnelDestTotalUpTime = time since Resv sent
mplsTeP2mpTunnelDestInstanceUpTime = time since Resv sent
mplsTeP2mpTunnelDestPathChanges = 1
mplsTeP2mpTunnelDestLastPathChange = time since Resv sent
mplsTeP2mpTunnelDestCreationTime = time since Resv sent
mplsTeP2mpTunnelDestStateTransitions = 1
mplsTeP2mpTunnelDestDiscontinuityTime = 0
mplsTeP2mpTunnelDestAdminStatus = up(1)
mplsTeP2mpTunnelDestOperStatus = up(1)
mplsTeP2mpTunnelDestRowStatus = active(1)
mplsTeP2mpTunnelDestStorageType = volatile(2)
}
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{
mplsTeP2mpTunnelDestSrcSubGroupOriginType = ipv4(1)
mplsTeP2mpTunnelDestSrcSubGroupOrigin =
Path.SenderTemplate.SubGpOrigin
mplsTeP2mpTunnelDestSrcSubGroupID =
Path.SenderTemplate.SubGpID
mplsTeP2mpTunnelDestSubGroupOriginType = ipv4(1)
mplsTeP2mpTunnelDestSubGroupOrigin = "192.0.2.17"
mplsTeP2mpTunnelDestSubGroupID = 2
mplsTeP2mpTunnelDestDestinationType = ipv4(1)
mplsTeP2mpTunnelDestDestination = "192.0.2.66"
mplsTeP2mpTunnelDestBranchOutSegment =
index into mplsOutSegmentTable
mplsTeP2mpTunnelDestHopTableIndex =
index into the mplsTunnelHopTable
mplsTeP2mpTunnelDestPathInUse = 1
mplsTeP2mpTunnelDestCHopTableIndex =
index into the mplsTunnelCHopTable
mplsTeP2mpTunnelDestARHopTableIndex =
index into the mplsTunnelARHopTable
mplsTeP2mpTunnelDestTotalUpTime = time since Resv sent
mplsTeP2mpTunnelDestInstanceUpTime = time since Resv sent
mplsTeP2mpTunnelDestPathChanges = 1
mplsTeP2mpTunnelDestLastPathChange = time since Resv sent
mplsTeP2mpTunnelDestCreationTime = time since Resv sent
mplsTeP2mpTunnelDestStateTransitions = 1
mplsTeP2mpTunnelDestDiscontinuityTime = 0
mplsTeP2mpTunnelDestAdminStatus = up(1)
mplsTeP2mpTunnelDestOperStatus = up(1)
mplsTeP2mpTunnelDestRowStatus = active(1)
mplsTeP2mpTunnelDestStorageType = volatile(2)
}
A single entry in mplsTunnelResourceTable is automatically created to
reflect the reservation request on the upstream segment and both of
the downstream branches. The information is gathered from the
received Path message. The table entry is pointed to by
mplsTunnelResourcePointer.
The index value (mplsTunnelResourceIndex) is automatically generated.
{
mplsTunnelResourceIndex = 33
mplsTunnelResourceMaxRate = 0
mplsTunnelResourceMeanRate = 0
mplsTunnelResourceMaxBurstSize = 0
mplsTunnelResourceMeanBurstSize = 0
mplsTunnelResourceExBurstSize = 0
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mplsTunnelResourceExBurstSize = unspecified(1)
mplsTunnelResourceWeight = 0
mplsTunnelResourceRowStatus = active(1)
mplsTunnelResourceStorageType = volatile(2)
}
Finally, entries may also be read from the tunnel hop tables.
mplsTunnelHopTable contains the route information received in the
incoming Path message. It is separated out to refer to the two
separate downstream branches, and the entries are identified by the
corresponding values of mplsTeP2mpTunnelDestHopTableIndex. There are
four hops in total in our example.
{
mplsTunnelHopListIndex = 27
mplsTunnelPathOptionIndex = 1
mplsTunnelHopIndex = 1
mplsTunnelHopAddrType = ipv4(1)
mplsTunnelHopIpAddr = "192.0.2.33"
mplsTunnelHopIpPrefixLen = 32
mplsTunnelHopType = strict(2)
mplsTunnelHopInclude = true(1)
mplsTunnelHopPathOptionName = ""
mplsTunnelHopEntryPathComp = explicit(2)
mplsTunnelHopRowStatus = active(1)
mplsTunnelHopStorageType = volatile(2)
}
{
mplsTunnelHopListIndex = 27
mplsTunnelPathOptionIndex = 1
mplsTunnelHopIndex = 2
mplsTunnelHopAddrType = ipv4(1)
mplsTunnelHopIpAddr = "192.0.2.65"
mplsTunnelHopIpPrefixLen = 32
mplsTunnelHopType = strict(2)
mplsTunnelHopInclude = true(1)
mplsTunnelHopPathOptionName = ""
mplsTunnelHopEntryPathComp = explicit(2)
mplsTunnelHopRowStatus = active(1)
mplsTunnelHopStorageType = volatile(2)
}
{
mplsTunnelHopListIndex = 33
mplsTunnelPathOptionIndex = 1
mplsTunnelHopIndex = 1
mplsTunnelHopAddrType = ipv4(1)
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mplsTunnelHopIpAddr = "192.0.2.34"
mplsTunnelHopIpPrefixLen = 32
mplsTunnelHopType = strict(2)
mplsTunnelHopInclude = true(1)
mplsTunnelHopPathOptionName = ""
mplsTunnelHopEntryPathComp = explicit(2)
mplsTunnelHopRowStatus = active(1)
mplsTunnelHopStorageType = volatile(2)
}
{
mplsTunnelHopListIndex = 33
mplsTunnelPathOptionIndex = 1
mplsTunnelHopIndex = 2
mplsTunnelHopAddrType = ipv4(1)
mplsTunnelHopIpAddr = "192.0.2.66"
mplsTunnelHopIpPrefixLen = 32
mplsTunnelHopType = strict(2)
mplsTunnelHopInclude = true(1)
mplsTunnelHopPathOptionName = ""
mplsTunnelHopEntryPathComp = explicit(2)
mplsTunnelHopRowStatus = active(1)
mplsTunnelHopStorageType = volatile(2)
}
If the mplsTunnelCHopTable is used (and it might be used to supply
information about path expansions) the contents will, for this
example, be identical to the entries in the mplsTunnelHopTable
since strict explicit routes were used.
The mplsTunnelARHopTable is used to expose the information reported in
the Record Route object carried in the Resv message. In this example,
thre would also be four entries as shown below.
{
mplsTunnelARHopListIndex = 12
mplsTunnelARHopIndex = 1
mplsTunnelARHopAddrType = ipv4(1)
mplsTunnelARHopIpAddr = "192.0.2.33"
}
{
mplsTunnelARHopListIndex = 12
mplsTunnelARHopIndex = 2
mplsTunnelARHopAddrType = ipv4(1)
mplsTunnelARHopIpAddr = "192.0.2.65"
}
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{
mplsTunnelARHopListIndex = 197
mplsTunnelARHopIndex = 1
mplsTunnelARHopAddrType = ipv4(1)
mplsTunnelARHopIpAddr = "192.0.2.34"
}
{
mplsTunnelARHopListIndex = 197
mplsTunnelARHopIndex = 2
mplsTunnelARHopAddrType = ipv4(1)
mplsTunnelARHopIpAddr = "192.0.2.66"
}
6. Managing P2MP MPLS-TE LSPs Through the LSR MIB Module
The nature of P2MP tunnels is such that an LSR that is crossed by a
tunnel may either be the ingress of that tunnel or have precisely one
upstream LSP segment (also known as an in-segment [RFC3812]) for that
LSP. On the other hand, any LSR that is crossed by a tunnel may be an
egress for that tunnel, have one or more downstream segments (also
known as out-segments [RFC3812]) for that tunnel, or be both an
egress and have one or more out-segments. Thus, for an LSP at an LSR
there may be zero or one in-segments, and zero, one, or more than one
out-segments.
In-segments, out-segments, and their relationship through
cross-connections are modeled and managed in the MPLS-LSR-STD-MIB
module [RFC3813]. The mplsInSegmentTable contains in-segments, and
the mplsOutSegmentTable contains out-segments. The mplsXCTable
maintains the relationships between in- and out-segments such that
any many-to-many relationship is allowed. Each segment points into
the mplsXCTable using mplsInSegmentXCIndex and mplsOutSegmentXCIndex.
The mplsXCTable contains a series of entries indexed by the primary
mplsXCIndex object and subsidiary indexes mplsXCInSegmentIndex and
mplsXCOutSegmentIndex. All cross-connect entries for the same P2MP
LSP use the same value of mplsXCIndex, and this value is found in the
mplsTeP2mpTunnelP2mpXcIndex object in mplsTeP2mpTunnelTable.
A single P2MP cross-connect has zero or one in-segment. At the
ingress LSR, there is no in-segment and mplsXCInSegmentIndex is set
to the single octet 0x00. At transit LSRs, there is exactly one
in-segment and mplsXCInSegmentIndex is set to the value of
mplsInSegmentIndex for the in-segment as it appears in the
mplsInSegmentTable.
A single P2MP cross-connect has zero, one, or many out-segments. If
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there is no out-segment (the cross-connect is on an egress LSR),
there is one entry in the mplsXCTable indexed by mplsXCIndex set to
mplsInSegmentXCIndex from the in-segment's entry in
mplsInSegmentTable, mplsXCInSegmentIndex set to the value of
mplsInSegmentIndex that identifies the in-segment in
mplsInSegmentTable, and mplsXCOutSegmentIndex set to the single octet
0x00. This behavior is exactly as described in [RFC3813].
If there is exactly one out-segment (the cross-connect is on a
transit LSR) then the behavior is also exactly as described in
[RFC3813], and as well as the in-segment objects described in the
previous paragraph, mplsXCOutSegmentIndex is set to the value of
mplsOutSegmentIndex that identifies the out-segment in
mplsOutSegmentTable. Note that mplsInSegmentXCIndex and
mplsOutSegmentXCIndex from the relevant table entries will have the
same value which will provide the value of mplsXCIndex for the
cross-connect. This value is also found in the
mplsTeP2mpTunnelP2mpXcIndex object in mplsTeP2mpTunnelTable.
If there is more than one out-segment then there is one entry in
mplsXCTable table for each out-segment. The value of mplsXCIndex is
consistent across all of these table entries and can be found in the
mplsTeP2mpTunnelP2mpXcIndex object in mplsTeP2mpTunnelTable. The in-
segment index (mplsXCInSegmentIndex) is also consistent identifying
the single in-segment or (on the ingress LSR) containing the single
octet 0x00. Each of these mplsXCTable entries contains a different
mplsXCOutSegmentIndex value so that the table can easily be walked to
find all of the out-segments for the same cross-connect.
Finally, if an LSR is an egress as well as a transit or branch for
the P2MP LSP (we call this a bud LSR), mplsXCTable contains the
entries described above in combination. That is, one entry will have
mplsXCOutSegmentIndex set to the single octet 0x00, and other entries
with the same value of mplsXCIndex and mplsXCInSegmentIndex will
exist for each out-segment.
6.1. Example Use of the LSR MIB Module
This section demonstrates how the objects in MPLS-LSR-STD-MIB would
be set for an example P2MP LSP cross-connect. The information here
does not show how and in what order these objects should be set to
create the cross-connect, but shows what information would be read if
the tables were examined.
Figure 3 shows the LSP at the LSR that is being examined. There are
three interfaces to LSR X: 10, 21 and 22. The LSP enters through
interface 10 using label 7, and exits through interfaces 21 and 22
using labels 8 and 9 respectively. Let us assume that LSR X is also
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an egress for the LSP.
-------
| |21 Label 8
Label 7 | +------------->
--->----------+ LSR X |
10| +------------->
| |22 Label 9
-------
Figure 3 : A P2MP LSP at a Branch LSR
In mplsInSegmentTable there is a single entry
{
mplsInSegmentIndex = 0x00000015,
mplsInSegmentLabel = 7, -- incoming label
mplsInSegmentNPop = 1,
mplsInSegmentInterface = 10, -- incoming interface
mplsInSegmentXCIndex = 0x37 -- common index into XC table
}
In mplsOutSegmentTable there are two entries.
{
mplsOutSegmentIndex = 0x00000432,
mplsOutSegmentPushTopLabel = true(1),
mplsOutSegmentTopLabel = 8, -- outgoing label
mplsOutSegmentInterface = 21, -- outgoing interface
mplsOutSegmentXCIndex = 0x37 -- common index into XC table
}
{
mplsOutSegmentIndex = 0x00000017,
mplsOutSegmentPushTopLabel = true(1),
mplsOutSegmentTopLabel = 9, -- outgoing label
mplsOutSegmentInterface = 22, -- outgoing interface
mplsOutSegmentXCIndex = 0x37 -- common index into XC table
}
In mplsXCTable there are three entries. The first two are for the
cross-connections to the out-segments, and the third is for the local
egress.
{
mplsXCIndex = 0x37, -- common index
mplsXCInSegmentIndex = 0x00000015,-- the in-segment
mplsXCOutSegmentIndex = 0x00000432,-- first out-segment
mplsXCLspId = 0x0102 -- unique LSP ID
mplsXCLabelStackIndex = 0x00, -- only one outgoing label
}
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{
mplsXCIndex = 0x37, -- common index
mplsXCInSegmentIndex = 0x00000015,-- the in-segment
mplsXCOutSegmentIndex = 0x00000017,-- second out-segment
mplsXCLspId = 0x0102 -- unique LSP ID
mplsXCLabelStackIndex = 0x00, -- only one outgoing label
}
{
mplsXCIndex = 0x37, -- common index
mplsXCInSegmentIndex = 0x00000015,-- the in-segment
mplsXCOutSegmentIndex = 0x00, -- no out-segment
mplsXCLspId = 0x0102 -- unique LSP ID
mplsXCLabelStackIndex = 0x00, -- no other outgoing label
}
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7. MPLS Traffic Engineering P2MP MIB Definitions
This MIB module uses imports from [RFC2578], [RFC2580], [RFC2579],
[RFC3811], [RFC3812], [RFC3813], [RFC3289], and [RFC4001].
MPLS-TE-P2MP-STD-MIB DEFINITIONS ::= BEGIN
IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE,
Unsigned32, Counter32, Counter64, TimeTicks
FROM SNMPv2-SMI -- RFC 2578
MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP
FROM SNMPv2-CONF -- RFC 2580
TruthValue, RowStatus, StorageType, TimeStamp
FROM SNMPv2-TC -- RFC 2579
mplsStdMIB, MplsPathIndexOrZero
FROM MPLS-TC-STD-MIB -- RFC 3811
MplsIndexType
FROM MPLS-LSR-STD-MIB -- RFC 3813
mplsTunnelIndex, mplsTunnelInstance, mplsTunnelIngressLSRId,
mplsTunnelEgressLSRId
FROM MPLS-TE-STD-MIB -- RFC 3812
IndexInteger, IndexIntegerNextFree
FROM DIFFSERV-MIB -- RFC 3289
InetAddress, InetAddressType
FROM INET-ADDRESS-MIB -- RFC 4001
;
mplsTeP2mpStdMIB MODULE-IDENTITY
LAST-UPDATED "200903060000Z" -- March 6, 2009
ORGANIZATION
"Multiprotocol Label Switching (MPLS) Working Group"
CONTACT-INFO
" Adrian Farrel
Old Dog Consulting
Email: adrian@olddog.co.uk
Seisho Yasukawa
NTT Corporation
Email: s.yasukawa@hco.ntt.co.jp
Thomas D. Nadeau
British Telecom
Email: tom.nadeau@bt.com
Comments about this document should be emailed
directly to the MPLS working group mailing list at
mpls@lists.ietf.org"
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DESCRIPTION
"Copyright (c) 2009 IETF Trust and the persons identified as
the document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's
Legal Provisions Relating to IETF Documents in effect on the
date of publication of this document
(http://trustee.ietf.org/license-info). Please review these
documents carefully, as they describe your rights and
restrictions with respect to this document.
The initial version of this MIB module was published in
RFC XXXX. For full legal notices see the RFC itself or see:
http://www.ietf.org/copyrights/ianamib.html
-- RFC Editor. Please replace XXXX with the RFC number for this
-- document and remove this note.
This MIB module contains managed object definitions
for Point-to-Multipoint (P2MP) MPLS Traffic Engineering (TE)
defined in:
1. Signaling Requirements for Point-to-Multipoint
Traffic-Engineered MPLS Label Switched Paths (LSPs),
S. Yasukawa, RFC 4461, April 2006.
2. Extensions to Resource Reservation Protocol - Traffic
Engineering (RSVP-TE) for Point-to-Multipoint TE Label
Switched Paths (LSPs), Aggarwal, R., Papadimitriou, D.,
and Yasukawa, S., RFC 4875, May 2007."
-- Revision history.
REVISION
"200903060000Z" -- March 6, 2009
DESCRIPTION
"Initial version issued as part of RFC XXXX."
-- RFC Editor. Please replace XXXX with the RFC number for this
-- document and remove this note.
::= { mplsStdMIB YYY }
-- RFC Editor. Please replace YYY with the codepoint issued by IANA
-- and remove this note.
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-- Top level components of this MIB module.
-- notifications
mplsTeP2mpNotifications OBJECT IDENTIFIER ::= { mplsTeP2mpStdMIB 0 }
-- tables, scalars
mplsTeP2mpScalars OBJECT IDENTIFIER ::= { mplsTeP2mpStdMIB 1 }
mplsTeP2mpObjects OBJECT IDENTIFIER ::= { mplsTeP2mpStdMIB 2 }
-- conformance
mplsTeP2mpConformance OBJECT IDENTIFIER ::= { mplsTeP2mpStdMIB 3 }
-- MPLS P2MP Tunnel scalars.
mplsTeP2mpTunnelConfigured OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of P2MP tunnels configured on this device. A
tunnel is considered configured if the mplsTunnelRowStatus
in MPLS-TE-STD-MIB is active(1)."
REFERENCE
"RFC 3812 - Multiprotocol Label Switching (MPLS) Traffic
Engineering (TE) Management Information Base (MIB),
Srinivasan, C., Viswanathan, A., and T. Nadeau, June 2004."
::= { mplsTeP2mpScalars 1 }
mplsTeP2mpTunnelActive OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of P2MP tunnels active on this device. A
tunnel is considered active if the mplsTunnelOperStatus
in MPLS-TE-STD-MIB is up(1)."
REFERENCE
"RFC 3812 - Multiprotocol Label Switching (MPLS) Traffic
Engineering (TE) Management Information Base (MIB),
Srinivasan, C., Viswanathan, A., and T. Nadeau, June 2004."
::= { mplsTeP2mpScalars 2 }
mplsTeP2mpTunnelTotalMaxHops OBJECT-TYPE
SYNTAX Unsigned32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The maximum number of hops that can be specified for an
entire P2MP tunnel on this device. This object should be
used in conjunction with mplsTunnelMaxHops in
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MPLS-TE-STD-MIB that is used in the context of P2MP tunnels
to express the maximum number of hops to any individual
destination of a P2MP tunnel that can be configured on this
device. mplsTeP2mpTunnelTotalMaxHops would normally be set
larger than or equal to mplsTunnelMaxHops."
REFERENCE
"RFC 3812 - Multiprotocol Label Switching (MPLS) Traffic
Engineering (TE) Management Information Base (MIB),
Srinivasan, C., Viswanathan, A., and T. Nadeau, June 2004."
::= { mplsTeP2mpScalars 3 }
-- End of MPLS Tunnel scalars.
-- MPLS P2MP tunnel table.
mplsTeP2mpTunnelTable OBJECT-TYPE
SYNTAX SEQUENCE OF MplsTeP2mpTunnelEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The mplsTeP2mpTunnelTable allows new P2MP MPLS tunnels to be
created between an LSR and one or more remote end-points,
and existing P2MP tunnels to be reconfigured or removed.
This table sparse augments mplsTunnelTable in
MPLS-TE-STD-MIB such that entries in that table can be
flagged as point-to-multipoint, and can be configured and
monitored appropriately."
REFERENCE
"RFC 3812 - Multiprotocol Label Switching (MPLS) Traffic
Engineering (TE) Management Information Base (MIB),
Srinivasan, C., Viswanathan, A., and T. Nadeau, June 2004."
::= { mplsTeP2mpObjects 1 }
mplsTeP2mpTunnelEntry OBJECT-TYPE
SYNTAX MplsTeP2mpTunnelEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in this table represents a P2MP MPLS tunnel.
An entry can be created by a network administrator or by an
SNMP agent as instructed by an MPLS signaling protocol.
An entry in this table MUST correspond to an entry in the
mplsTunnelTable in MPLS-TE-STD-MIB. This table shares index
objects with that table and sparse augments that table.
Thus, an entry in this table can only be created at the same
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time as or after a corresponding entry in mplsTunnelTable,
and an entry in mplsTunnelTable cannot be deleted while a
corresponding entry exists in this table.
This table entry includes a row status object, but
administrative and operational statuses should be taken from
mplsTunnelAdminStatus and mplsTunnelOperStatus in the
corresponding entry in mplsTunnelTable."
REFERENCE
"RFC 3812 - Multiprotocol Label Switching (MPLS) Traffic
Engineering (TE) Management Information Base (MIB),
Srinivasan, C., Viswanathan, A., and T. Nadeau, June 2004."
INDEX { mplsTunnelIndex,
mplsTunnelInstance,
mplsTunnelIngressLSRId,
mplsTunnelEgressLSRId
}
::= { mplsTeP2mpTunnelTable 1 }
MplsTeP2mpTunnelEntry ::= SEQUENCE {
mplsTeP2mpTunnelP2mpIntegrity TruthValue,
mplsTeP2mpTunnelBranchRole INTEGER,
mplsTeP2mpTunnelP2mpXcIndex MplsIndexType,
mplsTeP2mpTunnelRowStatus RowStatus,
mplsTeP2mpTunnelStorageType StorageType
}
mplsTeP2mpTunnelP2mpIntegrity OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Denotes whether or not P2MP Integrity is required for this
tunnel.
If P2MP integrity is operational on a P2MP tunnel then the
failure of the path to any of the tunnel destinations should
cause the teardown of the entire P2MP tunnel."
REFERENCE
"RFC 4875 - Extensions to Resource Reservation Protocol -
Traffic Engineering (RSVP-TE) for Point-to-Multipoint TE
Label Switched Paths (LSPs), R. Aggarwal, D. Papadimitriou,
and S. Yasukawa, May 2007."
DEFVAL { false }
::= { mplsTeP2mpTunnelEntry 2 }
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mplsTeP2mpTunnelBranchRole OBJECT-TYPE
SYNTAX INTEGER { notBranch(1),
branch(2),
bud(3) }
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This value supplements the value in the object
mplsTunnelRole in MPLS-TE-STD-MIB that indicates the role
of this LSR in the tunnel represented by this entry in
mplsTeP2mpTunnelTable.
mplsTunnelRole may take any of the values:
head(1),
transit(2),
tail(3),
headTail(4)
If this LSR is an ingress and there is exactly one
out-segment, mplsTunnelRole should contain the value
head(1), and mplsTeP2mpTunnelBranchRole should have the
value notBranch(1).
If this LSR is an ingress with more than one out segment,
mplsTunnelRole should contain the value head(1), and
mplsTeP2mpTunnelBranchRole should have the value branch(2).
If this LSR is an ingress, an egress, and there is one or
more out-segments, mplsTunnelRole should contain the value
headTail(4), and mplsTeP2mpTunnelBranchRole should have the
value bud(3).
If this LSR is a transit with exactly one out-segment,
mplsTunnelRole should contain the value transit(2), and
mplsTeP2mpTunnelBranchRole should have the value
notBranch(1).
If this LSR is a transit with more than one out-segment,
mplsTunnelRole should contain the value transit(2), and
mplsTeP2mpTunnelBranchRole should have the value branch(2).
If this LSR is a transit with one or more out-segments and
is also an egress, mplsTunnelRole should contain the value
transit(2), and mplsTeP2mpTunnelBranchRole should have the
value bud(3).
If this LSR is an egress with no out-segment and is not the
ingress, mplsTunnelRole should contain the value tail(3),
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and mplsTeP2mpTunnelBranchRole should have the value
notBranch(1).
If this LSR is an egress and has one or more out-segments,
mplsTunnelRole should contain the value transit(1), and
mplsTeP2mpTunnelBranchRole should have the value bud(3)."
REFERENCE
"RFC 3812 - Multiprotocol Label Switching (MPLS) Traffic
Engineering (TE) Management Information Base (MIB),
Srinivasan, C., Viswanathan, A., and T. Nadeau, June 2004."
DEFVAL { notBranch }
::= { mplsTeP2mpTunnelEntry 3 }
mplsTeP2mpTunnelP2mpXcIndex OBJECT-TYPE
SYNTAX MplsIndexType
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object contains the value of mplsXCIndex, the primary
index of the mplsXCTable for all cross-connect entries for
this P2MP LSP.
If no XC entries have been created yet, this object must
return zero.
The set of entries in the mplsXCTable for this P2MP LSP can
be walked by reading Get-or-GetNext starting with the three
indexes to mplsXCTable set as:
mplsXCIndex = the value of this object
mplsXCInSegmentIndex = 0x0
mplsXCOutSegmentIndex = 0x0"
REFERENCE
"RFC 3813 - Multiprotocol Label Switching (MPLS) Label
Switching (LSR) Router Management Information Base (MIB),
Srinivasan, C., Viswanathan, A., and T. Nadeau, June 2004."
::= { mplsTeP2mpTunnelEntry 4 }
mplsTeP2mpTunnelRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This variable is used to create, modify, and/or delete a row
in this table. When a row in this table is in active(1)
state, no objects in that row can be modified by the agent
except mplsTeP2mpTunnelRowStatus and
mplsTeP2mpTunnelStorageType.
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This object and mplsTunnelRowStatus in the corresponding
entry in mplsTunnelTable in MPLS-TE-STD-MIB should be
managed together. No objects in a row in this table can be
modified when the mplsTunnelRowStatus object in the
corresponding row in mplsTunnelTable has value active(1).
Note that no admin or oper status objects are provided in
this table. The administrative and operational status of
P2MP tunnels is taken from the values of
mplsTunnelAdminStatus and mplsTunnelOperStatus in the
corresponding row mplsTunneltable."
REFERENCE
"RFC 3812 - Multiprotocol Label Switching (MPLS) Traffic
Engineering (TE) Management Information Base (MIB),
Srinivasan, C., Viswanathan, A., and T. Nadeau, June 2004."
::= { mplsTeP2mpTunnelEntry 5 }
mplsTeP2mpTunnelStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The storage type for this tunnel entry.
Conceptual rows having the value 'permanent' need not allow
write-access to any columnar objects in the row."
DEFVAL { volatile }
::= { mplsTeP2mpTunnelEntry 6 }
-- End of mplsTeP2mpTunnelTable
-- MPLS P2MP tunnel destination table.
mplsTeP2mpTunnelSubGroupIDNext OBJECT-TYPE
SYNTAX IndexIntegerNextFree (0..65535)
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object contains an unused value for
mplsTeP2mpTunnelDestSubGroupID, or a zero to indicate that
none exists. Negative values are not allowed, as they do not
correspond to valid values of
mplsTeP2mpTunnelDestSubGroupID.
Note that this object offers an unused value for an
mplsTeP2mpTunnelDestSubGroupID value at the local LSR when
it is a sub-group originator. In other cases, the value of
mplsTeP2mpTunnelDestSubGroupID SHOULD be taken from the
received value signaled by the signaling protocol and
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corresponds to the value in
mplsTeP2mpTunnelDestSrcSubGroupID."
::= { mplsTeP2mpObjects 2 }
mplsTeP2mpTunnelDestTable OBJECT-TYPE
SYNTAX SEQUENCE OF MplsTeP2mpTunnelDestEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The mplsTeP2mpTunnelDestTable allows new destinations of
P2MP MPLS tunnels to be added to and removed from P2MP
tunnels."
REFERENCE
"RFC 3812 - Multiprotocol Label Switching (MPLS) Traffic
Engineering (TE) Management Information Base (MIB),
Srinivasan, C., Viswanathan, A., and T. Nadeau, June 2004."
::= { mplsTeP2mpObjects 3 }
mplsTeP2mpTunnelDestEntry OBJECT-TYPE
SYNTAX MplsTeP2mpTunnelDestEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in this table represents a destination of a P2MP
MPLS tunnel. An entry can be created by a network
administrator or by an SNMP agent as instructed by an MPLS
signaling protocol.
Entries in this table share some index fields with the
mplsTeP2mpTunnelTable and the mplsTunnelTable in
MPLS-TE-STD-MIB. Entries in this table have no meaning
unless there is a corresponding entry in
mplsTeP2mpTunnelTable (which, itself, depends on a
corresponding entry in mplsTunnelTable).
Note that the same destination may be present more than once
if it is in more than one sub-group as reflected by the
mplsTeP2mpTunnelDestSrcSubGroupOriginType,
mplsTeP2mpTunnelDestSrcSubGroupOrigin,
mplsTeP2mpTunnelDestSrcSubGroupID,
mplsTeP2mpTunnelDestSubGroupOriginType,
mplsTeP2mpTunnelDestSubGroupOrigin, and
mplsTeP2mpTunnelDestSubGroupID, index objects.
Entries in this table may be created at any time. If created
before an entry in the mplsTeP2mpTunnelTable the entries
have no meaning, but may be kept ready for the creation of
the P2MP tunnel. If created after the entry in
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mplsTeP2mpTunnelTable, entries in this table may reflect the
addition of destinations to active P2MP tunnels. For this
reason, entries in this table are equipped with row, admin,
and oper status objects. "
REFERENCE
"RFC 3812 - Multiprotocol Label Switching (MPLS) Traffic
Engineering (TE) Management Information Base (MIB),
Srinivasan, C., Viswanathan, A., and T. Nadeau, June 2004."
INDEX { mplsTunnelIndex,
mplsTunnelInstance,
mplsTunnelIngressLSRId,
mplsTunnelEgressLSRId,
mplsTeP2mpTunnelDestSrcSubGroupOriginType,
mplsTeP2mpTunnelDestSrcSubGroupOrigin,
mplsTeP2mpTunnelDestSrcSubGroupID,
mplsTeP2mpTunnelDestSubGroupOriginType,
mplsTeP2mpTunnelDestSubGroupOrigin,
mplsTeP2mpTunnelDestSubGroupID,
mplsTeP2mpTunnelDestDestinationType,
mplsTeP2mpTunnelDestDestination
}
::= { mplsTeP2mpTunnelDestTable 1 }
MplsTeP2mpTunnelDestEntry ::= SEQUENCE {
mplsTeP2mpTunnelDestSrcSubGroupOriginType InetAddressType,
mplsTeP2mpTunnelDestSrcSubGroupOrigin InetAddress,
mplsTeP2mpTunnelDestSrcSubGroupID IndexInteger,
mplsTeP2mpTunnelDestSubGroupOriginType InetAddressType,
mplsTeP2mpTunnelDestSubGroupOrigin InetAddress,
mplsTeP2mpTunnelDestSubGroupID IndexInteger,
mplsTeP2mpTunnelDestDestinationType InetAddressType,
mplsTeP2mpTunnelDestDestination InetAddress,
mplsTeP2mpTunnelDestBranchOutSegment MplsIndexType,
mplsTeP2mpTunnelDestHopTableIndex MplsPathIndexOrZero,
mplsTeP2mpTunnelDestPathInUse MplsPathIndexOrZero,
mplsTeP2mpTunnelDestCHopTableIndex MplsPathIndexOrZero,
mplsTeP2mpTunnelDestARHopTableIndex MplsPathIndexOrZero,
mplsTeP2mpTunnelDestTotalUpTime TimeTicks,
mplsTeP2mpTunnelDestInstanceUpTime TimeTicks,
mplsTeP2mpTunnelDestPathChanges Counter32,
mplsTeP2mpTunnelDestLastPathChange TimeTicks,
mplsTeP2mpTunnelDestCreationTime TimeStamp,
mplsTeP2mpTunnelDestStateTransitions Counter32,
mplsTeP2mpTunnelDestDiscontinuityTime TimeStamp,
mplsTeP2mpTunnelDestAdminStatus INTEGER,
mplsTeP2mpTunnelDestOperStatus INTEGER,
mplsTeP2mpTunnelDestRowStatus RowStatus,
mplsTeP2mpTunnelDestStorageType StorageType
}
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mplsTeP2mpTunnelDestSrcSubGroupOriginType OBJECT-TYPE
SYNTAX InetAddressType
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This object identifies the type of address carried in
mplsTeP2mpTunnelDestSrcSubGroupOrigin.
Since the object mplsTeP2mpTunnelDestSrcSubGroupOrigin must
conform to the protocol specification, this object must
return either ipv4(1) or ipv6(2) at a transit or egress LSR.
At an ingress LSR, there is no source sub-group and this
object should return the value unknown(0)."
::= { mplsTeP2mpTunnelDestEntry 1 }
mplsTeP2mpTunnelDestSrcSubGroupOrigin OBJECT-TYPE
SYNTAX InetAddress (SIZE(0|4|16))
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The TE Router ID (reachable and stable IP address) of the
originator of the P2MP sub-group as received on a Path
message by a transit or egress LSR.
This object is interpreted in the context of
mplsTeP2mpTunnelDestSrcSubGroupOriginType.
The value of the sub-group originator used on outgoing Path
messages is found in mplsTeP2mpTunnelDestSubGroupOrigin and
is copied from this object unless this LSR is responsible
for changing the sub-group ID.
At an ingress LSR there is no received Path message.
mplsTeP2mpTunnelDestSrcSubGroupOriginType should return
unknown(0), and this object should return a zero-length
string."
REFERENCE
"RFC 4875 - Extensions to Resource Reservation Protocol -
Traffic Engineering (RSVP-TE) for Point-to-Multipoint TE
Label Switched Paths (LSPs), R. Aggarwal, D. Papadimitriou,
and S. Yasukawa, May 2007."
::= { mplsTeP2mpTunnelDestEntry 2 }
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mplsTeP2mpTunnelDestSrcSubGroupID OBJECT-TYPE
SYNTAX IndexInteger (0..65535)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The unique identifier assigned by the sub-group originator
for this sub-group of this P2MP tunnel as received on a Path
message by a transit or egress LSR.
The value of the sub-group identifier used on outgoing Path
messages is found in mplsTeP2mpTunnelDestSubGroupID and is
copied from this object unless this LSR is responsible for
changing the sub-group ID.
At an ingress LSR there is no received Path message, and
this object should return zero."
REFERENCE
"RFC 4875 - Extensions to Resource Reservation Protocol -
Traffic Engineering (RSVP-TE) for Point-to-Multipoint TE
Label Switched Paths (LSPs), R. Aggarwal, D. Papadimitriou,
and S. Yasukawa, May 2007."
::= { mplsTeP2mpTunnelDestEntry 3 }
mplsTeP2mpTunnelDestSubGroupOriginType OBJECT-TYPE
SYNTAX InetAddressType
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This object identifies the type of address carried in
mplsTeP2mpTunnelDestSubGroupOrigin.
This object must return either ipv4(1) or ipv6(2) in keeping
with the protocol specification."
::= { mplsTeP2mpTunnelDestEntry 4 }
mplsTeP2mpTunnelDestSubGroupOrigin OBJECT-TYPE
SYNTAX InetAddress (SIZE(4|16))
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The TE Router ID (reachable and stable IP address) of the
originator of the P2MP sub-group. In many cases, this will
be the ingress LSR of the P2MP tunnel and will be the
received signaled value as available in
mplsTeP2mpTunnelDestSrcSubGroupOrigin.
When a signaling protocol is used, this object corresponds
to the Sub-Group Originator field in the SENDER_TEMPLATE
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object.
This object is interpreted in the context of
mplsTeP2mpTunnelDestSubGroupOriginType."
REFERENCE
"RFC 4875 - Extensions to Resource Reservation Protocol -
Traffic Engineering (RSVP-TE) for Point-to-Multipoint TE
Label Switched Paths (LSPs), R. Aggarwal, D. Papadimitriou,
and S. Yasukawa, May 2007."
::= { mplsTeP2mpTunnelDestEntry 5 }
mplsTeP2mpTunnelDestSubGroupID OBJECT-TYPE
SYNTAX IndexInteger (1..65535)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The unique identifier assigned by the sub-group originator
for this sub-group of this P2MP tunnel.
An appropriate value for this object during row creation
when the sub-group origin in
mplsTeP2mpTunnelDestSubGroupOrigin is the local LSR can
be obtained by reading mplsTeP2mpTunnelSubGroupIDNext.
At an egress, there is no downstream sub-group ID. This
object should return the value received from upstream and
reported in mplsTeP2mpTunnelDestSrcSubGroupID."
REFERENCE
"RFC 4875 - Extensions to Resource Reservation Protocol -
Traffic Engineering (RSVP-TE) for Point-to-Multipoint TE
Label Switched Paths (LSPs), R. Aggarwal, D. Papadimitriou,
and S. Yasukawa, May 2007."
::= { mplsTeP2mpTunnelDestEntry 6 }
mplsTeP2mpTunnelDestDestinationType OBJECT-TYPE
SYNTAX InetAddressType
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This object identifies the type of address carried in
mplsTeP2mpTunnelDestDestination.
This object forms part of the index of this table and can,
therefore, not return the value unknown(0). Similarly, since
the object mplsTeP2mpTunnelDestDestination must conform to
the protocol specification, this object must return either
ipv4(1) or ipv6(2)."
::= { mplsTeP2mpTunnelDestEntry 7 }
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mplsTeP2mpTunnelDestDestination OBJECT-TYPE
SYNTAX InetAddress (SIZE(4|16))
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A single destination of this P2MP tunnel. That is, a
routable TE address of a leaf. This will often be the TE
Router ID of the leaf, but can be any interface address.
When a signaling protocol is used, this object corresponds
to the S2L Sub-LSP destination address field in the
S2L_SUB_LSP object.
This object is interpreted in the context of
mplsTeP2mpTunnelDestDestinationType."
REFERENCE
"RFC 4875 - Extensions to Resource Reservation Protocol -
Traffic Engineering (RSVP-TE) for Point-to-Multipoint TE
Label Switched Paths (LSPs), R. Aggarwal, D. Papadimitriou,
and S. Yasukawa, May 2007."
::= { mplsTeP2mpTunnelDestEntry 8 }
mplsTeP2mpTunnelDestBranchOutSegment OBJECT-TYPE
SYNTAX MplsIndexType
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object identifies the outgoing branch from this LSR
towards the destination represented by this table entry. It
must be a unique identifier within the scope of this tunnel.
If MPLS-LSR-STD-MIB is implemented, this object should
contain an index into mplsOutSegmentTable.
If MPLS-LSR-STD-MIB is not implemented, the LSR should
assign a unique value to each branch of the tunnel.
The value of this object is also used as an index into
mplsTeP2mpTunnelBranchPerfTable."
::= { mplsTeP2mpTunnelDestEntry 9 }
mplsTeP2mpTunnelDestHopTableIndex OBJECT-TYPE
SYNTAX MplsPathIndexOrZero
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Index into the mplsTunnelHopTable entry that specifies the
explicit route hops for this destination of the P2MP tunnel.
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This object represents the configured route for the branch
of the P2MP tree to this destination and is meaningful only
at the head-end (ingress or root) of the P2MP tunnel. Note
that many such paths may be configured within the
mplsTunnelHopTable for each destination, and that the object
mplsTeP2mpTunnelDestPathInUse identifies which path has been
selected for use."
DEFVAL { 0 }
::= { mplsTeP2mpTunnelDestEntry 10 }
mplsTeP2mpTunnelDestPathInUse OBJECT-TYPE
SYNTAX MplsPathIndexOrZero
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This value denotes the configured path that was chosen as
the explicit path to this destination of this P2MP tunnel.
This value reflects the secondary index into
mplsTunnelHopTable where the primary index comes from
mplsTeP2mpTunnelDestHopTableIndex.
The path indicated by this object might not exactly match
the one signaled and recorded in mplsTunnelCHopTable as
specific details of the path might be computed locally.
Similarly, the path might not match the actual path in use
as recorded in mplsTunnelARHopTable due to the fact that
some details of the path may have been resolved within the
network.
A value of zero denotes that no path is currently in use or
available."
DEFVAL { 0 }
::= { mplsTeP2mpTunnelDestEntry 11 }
mplsTeP2mpTunnelDestCHopTableIndex OBJECT-TYPE
SYNTAX MplsPathIndexOrZero
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Index into the mplsTunnelCHopTable that identifies the
explicit path for this destination of the P2MP tunnel.
This path is based on the chosen configured path identified
by mplsTeP2mpTunnelDestHopTableIndex and
mplsTeP2mpTunnelDestPathInUse, but may have been modified
and automatically updated by the agent when computed hops
become available or when computed hops get modified.
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If this destination is the destination of the 'first S2L
sub-LSP' then this path will be signaled in the Explicit
Route Object. If this destination is the destination of a
'subsequent S2L sub-LSP' then this path will be signaled in
a Secondary Explicit Route Object."
REFERENCE
"RFC 4875 - Extensions to Resource Reservation Protocol -
Traffic Engineering (RSVP-TE) for Point-to-Multipoint TE
Label Switched Paths (LSPs), R. Aggarwal, D. Papadimitriou,
and S. Yasukawa, May 2007."
::= { mplsTeP2mpTunnelDestEntry 12 }
mplsTeP2mpTunnelDestARHopTableIndex OBJECT-TYPE
SYNTAX MplsPathIndexOrZero
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Index into the mplsTunnelARHopTable that identifies the
actual hops traversed to this destination of the P2MP
tunnel. This is automatically updated by the agent when the
actual hops becomes available.
If this destination is the destination of the 'first S2L
sub-LSP' then this path will be signaled in the Recorded
Route Object. If this destination is the destination of a
'subsequent S2L sub-LSP' then this path will be signaled in
a Secondary Recorded Route Object."
REFERENCE
"RFC 4875 - Extensions to Resource Reservation Protocol -
Traffic Engineering (RSVP-TE) for Point-to-Multipoint TE
Label Switched Paths (LSPs), R. Aggarwal, D. Papadimitriou,
and S. Yasukawa, May 2007."
::= { mplsTeP2mpTunnelDestEntry 13 }
mplsTeP2mpTunnelDestTotalUpTime OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This value represents the aggregate up time for all
instances of this tunnel to this destination, if this
information is available.
If this information is not available, this object MUST
return a value of 0."
::= { mplsTeP2mpTunnelDestEntry 14 }
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mplsTeP2mpTunnelDestInstanceUpTime OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This value identifies the total time that the currently
active tunnel instance to this destination has had its
operational status (mplsTeP2mpTunnelDestOperStatus) set to
up(1) since it was last previously not up(1)."
::= { mplsTeP2mpTunnelDestEntry 15 }
mplsTeP2mpTunnelDestPathChanges OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object counts the number of times the actual path for
this destination of this P2MP tunnel instance has changed.
This object should be read in conjunction with
mplsTeP2mpTunnelDestDiscontinuityTime."
::= { mplsTeP2mpTunnelDestEntry 16 }
mplsTeP2mpTunnelDestLastPathChange OBJECT-TYPE
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Specifies the time since the last change to the actual path
for this destination of this P2MP tunnel instance."
::= { mplsTeP2mpTunnelDestEntry 17 }
mplsTeP2mpTunnelDestCreationTime OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Specifies the value of sysUpTime when the first instance of
this tunnel came into existence for this destination. That
is, when the value of mplsTeP2mpTunnelDestOperStatus was
first set to up(1)."
::= { mplsTeP2mpTunnelDestEntry 18 }
mplsTeP2mpTunnelDestStateTransitions OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"This object counts the number of times the status
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(mplsTeP2mpTunnelDestOperStatus) of this tunnel instance to
this destination has changed.
This object should be read in conjunction with
mplsTeP2mpTunnelDestDiscontinuityTime."
::= { mplsTeP2mpTunnelDestEntry 19 }
mplsTeP2mpTunnelDestDiscontinuityTime OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime on the most recent occasion at which
any one or more of this row's Counter32 objects experienced
a discontinuity. If no such discontinuity has occurred since
the last re-initialization of the local management
subsystem, then this object contains a zero value."
::= { mplsTeP2mpTunnelDestEntry 20 }
mplsTeP2mpTunnelDestAdminStatus OBJECT-TYPE
SYNTAX INTEGER {
up(1), -- ready to pass data
down(2), -- out of service
testing(3) -- in some test mode
}
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Indicates the desired operational status of this
destination of this P2MP tunnel."
DEFVAL { up }
::= { mplsTeP2mpTunnelDestEntry 21 }
mplsTeP2mpTunnelDestOperStatus OBJECT-TYPE
SYNTAX INTEGER {
up(1), -- ready to pass data
down(2), -- out of service
testing(3), -- in some test mode
unknown(4), -- status cannot be determined
lowerLayerDown(7) -- down due to the state of
-- lower layer interfaces
}
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Indicates the actual operational status of this destination
of this P2MP tunnel. This object may be compared to
mplsTunnelOperStatus that includes two other values:
dormant(5) -- some component is missing
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notPresent(6) -- down due to the state of
-- lower layer interfaces.
These states do not aply to an individual destinaton of a
P2MP MPLS-TE LSP and so are not included in this object."
REFERENCE
"RFC 3812 - Multiprotocol Label Switching (MPLS) Traffic
Engineering (TE) Management Information Base (MIB),
Srinivasan, C., Viswanathan, A., and T. Nadeau, June 2004."
::= { mplsTeP2mpTunnelDestEntry 22 }
mplsTeP2mpTunnelDestRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"This object is used to create, modify, and/or delete a row
in this table. When a row in this table is in active(1)
state, no objects in that row can be modified by SET
operations except mplsTeP2mpTunnelDestAdminStatus and
mplsTeP2mpTunnelDestStorageType."
::= { mplsTeP2mpTunnelDestEntry 23 }
mplsTeP2mpTunnelDestStorageType OBJECT-TYPE
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
DESCRIPTION "The storage type for this table entry.
Conceptual rows having the value 'permanent' need
not allow write-access to any columnar objects in
the row."
DEFVAL { volatile }
::= { mplsTeP2mpTunnelDestEntry 24 }
-- End of mplsTeP2mpTunnelDestTable
-- MPLS Tunnel Branch Performance Table.
mplsTeP2mpTunnelBranchPerfTable OBJECT-TYPE
SYNTAX SEQUENCE OF MplsTeP2mpTunnelBranchPerfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table provides per-tunnel branch MPLS performance
information.
This table is not valid for switching types other than
packet."
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::= { mplsTeP2mpObjects 4 }
mplsTeP2mpTunnelBranchPerfEntry OBJECT-TYPE
SYNTAX MplsTeP2mpTunnelBranchPerfEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"An entry in this table is created by the LSR for each
downstream branch (out-segment) from this LSR for this P2MP
tunnel.
More than one destination as represented by an entry in the
mplsTeP2mpTunnelDestTable may be reached through a single
out-segment. More than one out-segment may belong to a
single P2MP tunnel represented by an entry in
mplsTeP2mpTunnelTable.
Each entry in the table is indexed by the four identifiers
of the P2MP tunnel, and the out-segment that identifies the
outgoing branch."
INDEX { mplsTunnelIndex,
mplsTunnelInstance,
mplsTunnelIngressLSRId,
mplsTunnelEgressLSRId,
mplsTeP2mpTunnelBranchPerfBranch
}
::= { mplsTeP2mpTunnelBranchPerfTable 1 }
MplsTeP2mpTunnelBranchPerfEntry ::= SEQUENCE {
mplsTeP2mpTunnelBranchPerfBranch MplsIndexType,
mplsTeP2mpTunnelBranchPerfPackets Counter32,
mplsTeP2mpTunnelBranchPerfHCPackets Counter64,
mplsTeP2mpTunnelBranchPerfErrors Counter32,
mplsTeP2mpTunnelBranchPerfBytes Counter32,
mplsTeP2mpTunnelBranchPerfHCBytes Counter64,
mplsTeP2mpTunnelBranchDiscontinuityTime TimeStamp
}
mplsTeP2mpTunnelBranchPerfBranch OBJECT-TYPE
SYNTAX MplsIndexType
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This object identifies an outgoing branch from this LSR
for this tunnel. Its value is unique within the context of
the tunnel.
If MPLS-LSR-STD-MIB is implemented, this object should
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contain an index into mplsOutSegmentTable.
Under all circumstances, this object should contain
the same value as mplsTeP2mpTunnelDestBranchOutSegment for
destinations reached on this branch."
::= { mplsTeP2mpTunnelBranchPerfEntry 1 }
mplsTeP2mpTunnelBranchPerfPackets OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of packets forwarded by the tunnel onto this branch.
This object should represents the 32-bit value of the least
significant part of the 64-bit value if both
mplsTeP2mpTunnelBranchPerfHCPackets is returned.
This object should be read in conjunction with
mplsTeP2mpTunnelBranchDiscontinuityTime."
::= { mplsTeP2mpTunnelBranchPerfEntry 2 }
mplsTeP2mpTunnelBranchPerfHCPackets OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"High capacity counter for number of packets forwarded by the
tunnel onto this branch.
This object should be read in conjunction with
mplsTeP2mpTunnelBranchDiscontinuityTime."
::= { mplsTeP2mpTunnelBranchPerfEntry 3 }
mplsTeP2mpTunnelBranchPerfErrors OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of packets dropped because of errors or for other
reasons, that were supposed to be forwarded onto this
branch for this tunnel. This object should be read in
conjunction with mplsTeP2mpTunnelBranchDiscontinuityTime."
::= { mplsTeP2mpTunnelBranchPerfEntry 4 }
mplsTeP2mpTunnelBranchPerfBytes OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Number of bytes forwarded by the tunnel onto this branch.
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This object should represents the 32-bit value of the least
significant part of the 64-bit value if both
mplsTeP2mpTunnelBranchPerfHCBytes is returned.
This object should be read in conjunction with
mplsTeP2mpTunnelBranchDiscontinuityTime."
::= { mplsTeP2mpTunnelBranchPerfEntry 5 }
mplsTeP2mpTunnelBranchPerfHCBytes OBJECT-TYPE
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"High capacity counter for number of bytes forwarded
by the tunnel onto this branch.
This object should be read in conjunction with
mplsTeP2mpTunnelBranchDiscontinuityTime."
::= { mplsTeP2mpTunnelBranchPerfEntry 6 }
mplsTeP2mpTunnelBranchDiscontinuityTime OBJECT-TYPE
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime on the most recent occasion at which
any one or more of this row's Counter32 or Counter64 objects
experienced a discontinuity. If no such discontinuity has
occurred since the last re-initialization of the local
management subsystem, then this object contains a zero
value."
::= { mplsTeP2mpTunnelBranchPerfEntry 7 }
-- End of mplsTeP2mpTunnelBranchPerfTable
-- Notifications.
mplsTeP2mpTunnelNotificationEnable OBJECT-TYPE
SYNTAX TruthValue
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"If this object is true(1), then it enables the generation of
mplsTeP2mpTunnelDestUp and mplsTeP2mpTunnelDestDown
notifications. Otherwise these notifications are not
emitted.
Note that when tunnels have large numbers of destinations,
setting this object to true(1) may result in the generation
of large numbers of notifications."
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DEFVAL { false }
::= { mplsTeP2mpObjects 5 }
mplsTeP2mpTunnelDestUp NOTIFICATION-TYPE
OBJECTS {
mplsTeP2mpTunnelDestAdminStatus,
mplsTeP2mpTunnelDestOperStatus
}
STATUS current
DESCRIPTION
"This notification is generated when a
mplsTeP2mpTunnelDestOperStatus object for one of the
destinations of one of the configured tunnels is about to
leave the down(2) state and transition into some other
state. This other state is indicated by the included value
of mplsTeP2mpTunneldestOperStatus.
This reporting of state transitions mirrors mplsTunnelUp."
REFERENCE
"RFC 3812 - Multiprotocol Label Switching (MPLS) Traffic
Engineering (TE) Management Information Base (MIB),
Srinivasan, C., Viswanathan, A., and T. Nadeau, June 2004."
::= { mplsTeP2mpNotifications 1 }
mplsTeP2mpTunnelDestDown NOTIFICATION-TYPE
OBJECTS {
mplsTeP2mpTunnelDestAdminStatus,
mplsTeP2mpTunnelDestOperStatus
}
STATUS current
DESCRIPTION
"This notification is generated when a
mplsTeP2mpTunnelDestOperStatus object for one of the
destinations of one of the configured tunnels is about to
enter the down(2) state from some other state. This other
state is indicated by the included value of
mplsTeP2mpTunnelDestOperStatus.
This reporting of state transitions mirrors mplsTunnelDown."
REFERENCE
"RFC 3812 - Multiprotocol Label Switching (MPLS) Traffic
Engineering (TE) Management Information Base (MIB),
Srinivasan, C., Viswanathan, A., and T. Nadeau, June 2004."
::= { mplsTeP2mpNotifications 2 }
-- End of notifications.
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--****************************************************************
-- Module Conformance Statement
--****************************************************************
mplsTeP2mpGroups
OBJECT IDENTIFIER ::= { mplsTeP2mpConformance 1 }
mplsTeP2mpCompliances
OBJECT IDENTIFIER ::= { mplsTeP2mpConformance 2 }
--
-- Full Compliance
-- Compliance requirement for fully compliant implementations.
-- Such implementations allow configuration of P2MP tunnels at
-- head-end LSRs via SNMP, and monitoring of P2MP tunnels at all
-- LSRs via SNMP.
--
mplsTeP2mpModuleFullCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"Compliance statement for agents that provide full support
for MPLS-TE-P2MP-STD-MIB. Such devices can be monitored and
also be configured using this MIB module.
The Module is implemented with support for read-create and
read-write. In other words, both monitoring and
configuration are available when using this
MODULE-COMPLIANCE."
MODULE -- this module
MANDATORY-GROUPS {
mplsTeP2mpGeneralGroup,
mplsTeP2mpNotifGroup,
mplsTeP2mpScalarGroup
}
-- mplsTeP2mpTunnelTable
OBJECT mplsTeP2mpTunnelRowStatus
SYNTAX RowStatus { active(1) }
WRITE-SYNTAX RowStatus { createAndGo(4), destroy(6) }
DESCRIPTION
"Support for createAndWait and notInService is not
required."
::= { mplsTeP2mpCompliances 1 }
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mplsTeP2mpModuleReadOnlyCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"Compliance statement for agents that provide read-only
support for MPLS-TE-P2MP-STD-MIB. Such devices can only be
monitored using this MIB module.
The Module is implemented with support for read-only. In
other words, only monitoring is available by implementing
this MODULE-COMPLIANCE."
MODULE -- this module
MANDATORY-GROUPS {
mplsTeP2mpGeneralGroup,
mplsTeP2mpScalarGroup,
mplsTeP2mpNotifGroup
}
-- mplsTeP2mpTunnelTable
OBJECT mplsTeP2mpTunnelP2mpIntegrity
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsTeP2mpTunnelBranchRole
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsTeP2mpTunnelP2mpXcIndex
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsTeP2mpTunnelRowStatus
SYNTAX RowStatus { active(1) }
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, and active(1) is the
only status that needs to be supported."
OBJECT mplsTeP2mpTunnelStorageType
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
-- mplsTeP2mpTunnelDestTable
OBJECT mplsTeP2mpTunnelDestHopTableIndex
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
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OBJECT mplsTeP2mpTunnelDestPathInUse
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsTeP2mpTunnelDestAdminStatus
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
OBJECT mplsTeP2mpTunnelDestRowStatus
SYNTAX RowStatus { active(1) }
MIN-ACCESS read-only
DESCRIPTION
"Write access is not required, and active(1) is the
only status that needs to be supported."
OBJECT mplsTeP2mpTunnelDestStorageType
MIN-ACCESS read-only
DESCRIPTION "Write access is not required."
::= { mplsTeP2mpCompliances 2 }
-- Units of conformance.
mplsTeP2mpGeneralGroup OBJECT-GROUP
OBJECTS {
mplsTeP2mpTunnelConfigured,
mplsTeP2mpTunnelActive,
mplsTeP2mpTunnelTotalMaxHops,
mplsTeP2mpTunnelP2mpIntegrity,
mplsTeP2mpTunnelBranchRole,
mplsTeP2mpTunnelP2mpXcIndex,
mplsTeP2mpTunnelRowStatus,
mplsTeP2mpTunnelStorageType,
mplsTeP2mpTunnelSubGroupIDNext,
mplsTeP2mpTunnelDestSrcSubGroupOriginType,
mplsTeP2mpTunnelDestSrcSubGroupOrigin,
mplsTeP2mpTunnelDestSrcSubGroupID,
mplsTeP2mpTunnelDestSubGroupOriginType,
mplsTeP2mpTunnelDestSubGroupOrigin,
mplsTeP2mpTunnelDestSubGroupID,
mplsTeP2mpTunnelDestDestinationType,
mplsTeP2mpTunnelDestDestination,
mplsTeP2mpTunnelDestBranchOutSegment,
mplsTeP2mpTunnelDestHopTableIndex,
mplsTeP2mpTunnelDestPathInUse,
mplsTeP2mpTunnelDestCHopTableIndex,
mplsTeP2mpTunnelDestARHopTableIndex,
mplsTeP2mpTunnelDestTotalUpTime,
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mplsTeP2mpTunnelDestInstanceUpTime,
mplsTeP2mpTunnelDestPathChanges,
mplsTeP2mpTunnelDestLastPathChange,
mplsTeP2mpTunnelDestCreationTime,
mplsTeP2mpTunnelDestStateTransitions,
mplsTeP2mpTunnelDestDiscontinuityTime,
mplsTeP2mpTunnelDestAdminStatus,
mplsTeP2mpTunnelDestOperStatus,
mplsTeP2mpTunnelDestRowStatus,
mplsTeP2mpTunnelDestStorageType,
mplsTeP2mpTunnelBranchPerfPackets,
mplsTeP2mpTunnelBranchPerfHCPackets,
mplsTeP2mpTunnelBranchPerfErrors,
mplsTeP2mpTunnelBranchPerfBytes,
mplsTeP2mpTunnelBranchPerfHCBytes,
mplsTeP2mpTunnelBranchDiscontinuityTime,
mplsTeP2mpTunnelNotificationEnable
}
STATUS current
DESCRIPTION
"Collection of objects needed for MPLS P2MP."
::= { mplsTeP2mpGroups 1 }
mplsTeP2mpNotifGroup NOTIFICATION-GROUP
NOTIFICATIONS {
mplsTeP2mpTunnelDestUp,
mplsTeP2mpTunnelDestDown
}
STATUS current
DESCRIPTION
"Notifications implemented in this module."
::= { mplsTeP2mpGroups 2 }
mplsTeP2mpScalarGroup OBJECT-GROUP
OBJECTS {
mplsTeP2mpTunnelConfigured,
mplsTeP2mpTunnelActive,
mplsTeP2mpTunnelTotalMaxHops
}
STATUS current
DESCRIPTION
"Scalar objects needed to implement P2MP MPLS tunnels."
::= { mplsTeP2mpGroups 3 }
END
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8. Security Considerations
It is clear that this MIB module is potentially useful for the
monitoring of P2MP MPLS TE tunnels. This MIB module can also be used
for the configuration of certain objects, and anything that can be
configured can be incorrectly configured, with potentially disastrous
results.
There are a number of management objects defined in this MIB module
with a MAX-ACCESS clause of read-write and/or read-create. Such
objects may be considered sensitive or vulnerable in some network
environments. The support for SET operations in a non-secure
environment without proper protection can have a negative effect on
network operations. These are the tables and objects and their
sensitivity/vulnerability:
- The mplsTeP2mpTunnelTable and mplsTeP2mpTunnelDestTable contain
objects that can be used to provision P2MP MPLS tunnels, the
destinations of those tunnels, and the hops that those tunnels take
through the network. Unauthorized access to objects in these tables
could result in disruption of traffic in the network. This is
especially true if a tunnel has already been established.
The use of stronger mechanisms, such as SNMPv3 security, should be
considered where possible. Specifically, SNMPv3 VACM and USM MUST
be used with any v3 agent which implements this MIB module.
Administrators SHOULD also consider whether read access to these
objects is allowed, since read access may be undesirable under
certain circumstances as described below.
- The use of this MIB module depends on the use of certain objects
within MPLS-TE-STD-MIB defined in [RFC3812]. Note that those
objects are also subject to the same security considerations, and
any vulnerability to those objects could compromise the P2MP MPLS
tunnels and/or data in the network. The security section of
[RFC3812] MUST be applied in conjunction with this security
section.
- This MIB module does not depend on MPLS-LSR-STD-MIB, but may be
used in conjunction with that MIB module. If MPLS-LSR-STD-MIB is
implemented on an LSR, then access to its objects can compromise
any P2MP MPLS tunnels that start or end on, or transit the LSR.
MPLS-LSR-STD-MIB is defined in [RFC3813] which has its own security
section that MUST be applied in conjunction with this security
section if both MIB modules are supported.
Some of the readable objects in this MIB module (i.e., objects with a
MAX-ACCESS other than not-accessible) may be considered sensitive or
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vulnerable in some network environments. It is thus important to
control even GET and/or NOTIFY access to these objects, and possibly
even to encrypt the values of these objects when sending them over
the network via SNMP. These are the tables and objects and their
sensitivity/vulnerability:
- The mplsTeP2mpTunnelTable, mplsTeP2mpTunnelDestTable, and
mplsTeP2mpTunnelBranchPerfTable collectively show information about
the P2MP MPLS tunnel, its route through the network, and its
performance characteristics. Knowledge of this information could be
used to compromise the network, or simply to breach
confidentiality. If an Administrator does not want to reveal this
information, these tables should be considered
sensitive/vulnerable.
- The objects in MPLS-TE-STD-MIB also provide information about the
P2MP MPLS tunnels defined in this MIB module. If an Administrator
does not want to reveal this information, the security section of
[RFC3812] should be applied.
- The objects in MPLS-LSR-STD-MIB, if implemented, may also provide
information about the P2MP MPLS tunnels present at an LSR,
especially the label swapping and cross-connect operations. If an
Administrator does not want to reveal this information, the
security section of [RFC3813] should be applied.
SNMP versions prior to SNMPv3 did not include adequate security.
Even if the network itself is secure (for example by using IPSec),
there is still no control as to who on the secure network is allowed
to access and GET/SET (read/change/create/delete) the objects in this
MIB module.
It is RECOMMENDED that implementers consider the security features as
provided by the SNMPv3 framework (see [RFC3410], section 8),
including full support for the SNMPv3 cryptographic mechanisms (for
authentication and privacy).
Further, deployment of SNMP versions prior to SNMPv3 is NOT
RECOMMENDED. Instead, it is RECOMMENDED that SNMPv3 be deployed and
cryptographic security enabled. It is then a customer/operator
responsibility to ensure that the SNMP entity giving access to an
instance of this MIB module is properly configured to give access to
only those principals (users) that have legitimate rights to those
objects.
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9. Acknowledgments
The authors wish to thank Tom Petch, Ben Niven-Jenkins, Markus
Stenberg, and Subodh Kumar for their input to this work. Thanks to
Zafar Ali for discussions. Nic Neate provided very many helpful
suggestions.
Joan Cucchiara provided a very thorough and helpful early MIB Doctor
review which caught a lot of issues.
10. IANA Considerations
As requested in MPLS-TC-STD-MIB [RFC3811], MPLS-related standards
track MIB modules should be rooted under the mplsStdMIB subtree.
There is one new MPLS MIB module contained in this document, and the
following "IANA Considerations" subsection requests IANA for a new
assignment under the mplsStdMIB subtree.
New assignments can only be made via a Standards Action as specified
in [RFC5226].
10.1. IANA Considerations for MPLS-TE-P2MP-STD-MIB
IANA is requested to assign an oid under the mplsStdMIB subtree to
the MPLS-TE-P2MP-STD-MIB module specified in this document.
-- RFC Editor. Please see the marker YYY in this document and replace it
-- with the value assigned by IANA.
-- Please remove this note.
11. References
11.1. Normative References
[RFC2119] Bradner, S., "Key Words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC2578] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"Structure of Management Information Version 2 (SMIv2)",
STD 58, RFC 2578, April 1999.
[RFC2579] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"Textual Conventions for SMIv2", STD 58, RFC 2579, April
1999.
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[RFC2580] McCloghrie, K., Perkins, D., and J. Schoenwaelder,
"Conformance Statements for SMIv2", STD 58, RFC 2580,
April 1999.
[RFC3031] Rosen, E., Viswanathan, A., and R. Callon, "Multiprotocol
Label Switching Architecture", RFC 3031, January 2001.
[RFC3209] Awduche, D., Berger, L., Gan, D., Li, T., Srinivasan, V.,
and G. Swallow, "RSVP-TE: Extensions to RSVP for LSP
Tunnels", RFC 3209, December 2001.
[RFC3289] Baker, F., Chan, K., and A. Smith, "Management Information
Base for the Differentiated Services Architecture", RFC
3289, May 2002.
[RFC3811] Nadeau, T. and J. Cucchiara, "Definition of Textual
Conventions and for Multiprotocol Label Switching (MPLS)
Management", RFC 3811, June 2004.
[RFC3812] Srinivasan, C., Viswanathan, A., and T. Nadeau,
"Multiprotocol Label Switching (MPLS) Traffic
Engineering (TE) Management Information Base (MIB)",
RFC 3812, June 2004.
[RFC3813] Srinivasan, C., Viswanathan, A., and T. Nadeau,
"Multiprotocol Label Switching (MPLS) Label Switching
(LSR) Router Management Information Base (MIB)", RFC 3813,
June 2004.
[RFC3945] Mannie, E., Ed., "Generalized Multiprotocol Label
Switching (GMPLS) Architecture", RFC 3945, October 2004.
[RFC4001] Daniele, M., Haberman, B., Routhier, S., and J.
Schoenwaelder, "TextualConventions for Internet Network
Addresses", RFC 4001, February 2005.
[RFC4875] Aggarwal, R., Papadimitriou, D., and Yasukawa, S.,
"Extensions to Resource Reservation Protocol - Traffic
Engineering (RSVP-TE) for Point-to-Multipoint TE Label
Switched Paths (LSPs)", RFC 4875, May 2007.
11.2. Informative References
[RFC3410] Case, J., Mundy, R., Partain, D., and B. Stewart,
"Introduction and Applicability Statement for Internet
Standard Management Framework", RFC 3410, December 2002.
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Internet Draft draft-ietf-mpls-p2mp-te-mib-08.txt March 2009
[RFC4221] Nadeau, T., Srinivasan, C., and A. Farrel, "Multiprotocol
Label Switching (MPLS) Management Overview", RFC 4221,
November 2005.
[RFC4461] S. Yasukawa, Editor "Signaling Requirements for
Point-to-Multipoint Traffic Engineered MPLS LSPs",
RFC 4461, April 2006.
[RFC4802] Nadeau, T. and A. Farrel, "Generalized Multiprotocol
Label Switching (GMPLS) Traffic Engineering Management
Information Base", RFC 4802, February 2007.
[RFC4803] Nadeau, T. and A. Farrel, "Generalized Multiprotocol
Label Switching (GMPLS) Label Switching Router (LSR)
Management Information Base", RFC 4803, February 2007.
[RFC5226] Narten, T. and H. Alvestrand., "Guidelines for Writing an
IANA Considerations Section in RFCs", BCP 26, RFC 5226,
May 2008.
12. Authors' Addresses
Adrian Farrel
Old Dog Consulting
Email: adrian@olddog.co.uk
Seisho Yasukawa
NTT Corporation
9-11, Midori-Cho 3-Chome
Musashino-Shi, Tokyo 180-8585 Japan
Phone: +81 422 59 4769
EMail: s.yasukawa@hco.ntt.co.jp
Thomas D. Nadeau
BT
BT Centre
81 Newgate Street
EC1A 7AJ
London
Email: tom.nadeau@bt.com
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under such rights might or might not be available; nor does it
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represent that it has made any independent effort to identify any
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15. Full Copyright Statement
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Farrel, Yasukawa, and Nadeau [Page 62]
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