draft-ietf-mpls-number-0-bw-te-lsps-03.txt   draft-ietf-mpls-number-0-bw-te-lsps-04.txt 
Networking Working Group JP. Vasseur, Ed. Networking Working Group JP. Vasseur, Ed.
Internet-Draft Cisco Systems, Inc Internet-Draft Cisco Systems, Inc
Intended status: Standards Track Matthew. R. Meyer Intended status: Standards Track Matthew. R. Meyer
Expires: June 1, 2007 Global Crossing Expires: June 11, 2007 Global Crossing
K. Kumaki K. Kumaki
KDDI Corporation KDDI Corporation
Alberto. Tempia Bonda Alberto. Tempia Bonda
Telecom Italia Telecom Italia
November 28, 2006 December 8, 2006
A Link-Type sub-TLV to convey the number of Traffic Engineering Label A Link-Type sub-TLV to convey the number of Traffic Engineering Label
Switch Paths signalled signalled with zero reserved bandwidth across a Switch Paths signalled signalled with zero reserved bandwidth across a
link link
draft-ietf-mpls-number-0-bw-te-lsps-03 draft-ietf-mpls-number-0-bw-te-lsps-04
Status of this Memo Status of this Memo
By submitting this Internet-Draft, each author represents that any By submitting this Internet-Draft, each author represents that any
applicable patent or other IPR claims of which he or she is aware applicable patent or other IPR claims of which he or she is aware
have been or will be disclosed, and any of which he or she becomes have been or will be disclosed, and any of which he or she becomes
aware will be disclosed, in accordance with Section 6 of BCP 79. aware will be disclosed, in accordance with Section 6 of BCP 79.
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
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and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt. http://www.ietf.org/ietf/1id-abstracts.txt.
The list of Internet-Draft Shadow Directories can be accessed at The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html. http://www.ietf.org/shadow.html.
This Internet-Draft will expire on June 1, 2007. This Internet-Draft will expire on June 11, 2007.
Copyright Notice Copyright Notice
Copyright (C) The Internet Society (2006). Copyright (C) The IETF Trust (2006).
Abstract Abstract
Several Link-type sub-TLVs have been defined for OSPF and ISIS in the Several Link-type sub-TLVs have been defined for OSPF and ISIS in the
context of Multiprotocol Label Switching (MPLS) Traffic Engineering context of Multiprotocol Label Switching (MPLS) Traffic Engineering
(TE) in order to advertise some link characteristics such as the (TE) in order to advertise some link characteristics such as the
available bandwidth, traffic engineering metric, administrative group available bandwidth, traffic engineering metric, administrative group
and so on. By making statistical assumption on the aggregated and so on. By making statistical assumption on the aggregated
traffic carried onto a set of TE Label Switched Paths (LSPs) traffic carried onto a set of TE Label Switched Paths (LSPs)
signalled with zero bandwdith (referred to as unconstrained TE LSP in signalled with zero bandwdith (referred to as unconstrained TE LSP in
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3. Protocol extensions 3. Protocol extensions
The Number of 0-bandwidth TE LSP(s) Sub-TLV is defined that specifies The Number of 0-bandwidth TE LSP(s) Sub-TLV is defined that specifies
the number of TE LSPs signalled with zero bandwidth across a link. the number of TE LSPs signalled with zero bandwidth across a link.
3.1. IS-IS 3.1. IS-IS
The Number of 0-bandwidth TE LSP(s) sub-TLV is OPTIONAL and MUST The Number of 0-bandwidth TE LSP(s) sub-TLV is OPTIONAL and MUST
appear at most once within the extended IS reachability TLV (type 22) appear at most once within the extended IS reachability TLV (type 22)
specified in [RFC3784]. If a second instance of the Number of specified in [RFC3784].
0-bandwidth TE LSP(s) sub-TLV is present, the receiving system MUST
only process the first instance of the sub-TLV.
The IS-IS Number of 0-bandwidth TE LSP(s) sub-TLV format is defined The IS-IS Number of 0-bandwidth TE LSP(s) sub-TLV format is defined
below: below:
Type (1 octet): To be assigned by IANA (suggested value = 18) Type (1 octet): To be assigned by IANA (suggested value = 18)
Length (1 octet): 4 Length (1 octet): 2
Value (4 octets): number of unconstrained TE LSP(s) signalled across
Value (2 octets): number of unconstrained TE LSP(s) signalled across
the link. the link.
3.2. OSPF 3.2. OSPF
The Number of 0-bandwidth TE LSP(s) sub-TLV is OPTIONAL and MUST The Number of 0-bandwidth TE LSP(s) sub-TLV is OPTIONAL and MUST
appear at most once within the Link TLV (Type 2) that is itself appear at most once within the Link TLV (Type 2) that is itself
carried within the Traffic Engineering LSA specified in [RFC3630] or carried within the Traffic Engineering LSA specified in [RFC3630] or
the OSPFv3 Intra-Area-TE LSA (function code 10) defined in the OSPFv3 Intra-Area-TE LSA (function code 10) defined in
[OSPFv3-TE]. If a second instance of the Number of draft-ietf-ospf-ospfv3-traffic-07.txt. If a second instance of the
0-bandwidth TE LSP(s) sub-TLV is present, the receiving Number of 0-bandwidth TE LSP(s) sub-TLV is present, the receiving
system MUST only process the first instance of the sub-TLV. system MUST only process the first instance of the sub-TLV.
The OSPF Number of 0-bandwidth TE LSP(s) sub-TLV format is defined The OSPF Number of 0-bandwidth TE LSP(s) sub-TLV format is defined
below: below:
Type (2 octets): To be assigned by IANA (suggested value = 18) Type (2 octets): To be assigned by IANA (suggested value = 18)
Length (2 octets): 4 Length (2 octets): 4
Value (4 octets): number of unconstrained TE LSP(s) signalled across Value (4 octets): number of unconstrained TE LSP(s) signalled across
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6. Security Considerations 6. Security Considerations
The function described in this document does not create any new The function described in this document does not create any new
security issues for the OSPF and the IS-IS protocols. Security security issues for the OSPF and the IS-IS protocols. Security
considerations are covered in [RFC2328] and [RFC2470] for the base considerations are covered in [RFC2328] and [RFC2470] for the base
OSPF protocol and in [RFC1194] for IS-IS. OSPF protocol and in [RFC1194] for IS-IS.
7. Acknowledgements 7. Acknowledgements
The authors would like to thank Jean-Louis Le Roux, Adrian Farrel, The authors would like to thank Jean-Louis Le Roux, Adrian Farrel,
Daniel King, Acee Lindem and Loa Anderson for their useful inputs. Daniel King, Acee Lindem, Loa Anderson and Les Ginsberg for
their useful inputs.
8. References 8. References
8.1. Normative References 8.1. Normative References
[RFC1194] Zimmerman, D., "Finger User Information Protocol", [RFC1194] Zimmerman, D., "Finger User Information Protocol",
RFC 1194, November 1990. RFC 1194, November 1990.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997. Requirement Levels", BCP 14, RFC 2119, March 1997.
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Alberto Tempia Bonda Alberto Tempia Bonda
Telecom Italia Telecom Italia
via G. Reiss Romoli 274 via G. Reiss Romoli 274
Torino, 10148 Torino, 10148
ITALIA ITALIA
Email: alberto.tempiabonda@telecomitalia.it Email: alberto.tempiabonda@telecomitalia.it
Full Copyright Statement Full Copyright Statement
Copyright (C) The Internet Society (2006). Copyright (C) The IETF Trust (2006).
This document is subject to the rights, licenses and restrictions This document is subject to the rights, licenses and restrictions
contained in BCP 78, and except as set forth therein, the authors contained in BCP 78, and except as set forth therein, the authors
retain all their rights. retain all their rights.
This document and the information contained herein are provided on an This document and the information contained herein are provided on an
"AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND
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INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
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