draft-ietf-mpls-crldp-unnum-03.txt   draft-ietf-mpls-crldp-unnum-04.txt 
Network Working Group Kireeti Kompella Network Working Group Kireeti Kompella
Internet Draft Juniper Networks Internet Draft Juniper Networks
Expiration Date: June 2002 Yakov Rekhter Expiration Date: August 2002 Yakov Rekhter
Juniper Networks Juniper Networks
Alan Kullberg Alan Kullberg
NetPlane Systems NetPlane Systems
Signalling Unnumbered Links in CR-LDP Signalling Unnumbered Links in CR-LDP
draft-ietf-mpls-crldp-unnum-03.txt draft-ietf-mpls-crldp-unnum-04.txt
1. Status of this Memo 1. Status of this Memo
This document is an Internet-Draft and is in full conformance with This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026. all provisions of Section 10 of RFC2026.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet- other groups may also distribute working documents as Internet-
Drafts. Drafts.
skipping to change at page 4, line 41 skipping to change at page 4, line 41
| Interface ID (32 bits) | | Interface ID (32 bits) |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
The Type is 0x0805 (Unnumbered Interface ID) and the Length is 8. The Type is 0x0805 (Unnumbered Interface ID) and the Length is 8.
The Interface ID is the identifier assigned to the link by the LSR The Interface ID is the identifier assigned to the link by the LSR
specified by the router ID. specified by the router ID.
6.1. Processing the IF_ID TLV 6.1. Processing the IF_ID TLV
When an LSR receives a REQUEST message containing the IF_ID TLV with When an LSR receives a REQUEST message containing the IF_ID TLV (see
the IF_INDEX TLV, the LSR processes this TLV as follows. The LSR [GMPLS-CRLDP]) with the IF_INDEX TLV, the LSR processes this TLV as
must have information about the identifiers assigned by its neighbors follows. The LSR must have information about the identifiers assigned
to the unnumbered links between the neighbors and the LSR. The LSR by its neighbors to the unnumbered links between the neighbors and
uses this information to find a link with tuple <Router ID, local the LSR. The LSR uses this information to find a link with tuple
identifier> matching the tuple <IP Address, Interface ID> carried in <Router ID, local identifier> matching the tuple <IP Address,
the IF_INDEX TLV. If the matching tuple is found, the match Interface ID> carried in the IF_INDEX TLV. If the matching tuple is
identifies the link for which the LSR has to perform label found, the match identifies the link for which the LSR has to perform
allocation. label allocation.
Otherwise, the LSR SHOULD return an error. Otherwise, the LSR SHOULD return an error.
6.2. Processing the ERO object 6.2. Processing the ERO object
The Unnumbered Interface ID subobject is defined to be a part of a The Unnumbered Interface ID subobject is defined to be a part of a
particular abstract node if that node has the Router ID that is equal particular abstract node if that node has the Router ID that is equal
to the Router ID field in the subobject, and if the node has an to the Router ID field in the subobject, and if the node has an
(unnumbered) link or an (unnumbered) Forwarding Adjacency whose local (unnumbered) link or an (unnumbered) Forwarding Adjacency whose local
identifier (from that node's point of view) is equal to the value identifier (from that node's point of view) is equal to the value
 End of changes. 

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