draft-ietf-ccamp-rfc4420bis-02.txt   draft-ietf-ccamp-rfc4420bis-03.txt 
INTERNET-DRAFT Adrian Farrel (Editor) INTERNET-DRAFT Adrian Farrel (Editor)
Network Working Group Old Dog Consulting Network Working Group Old Dog Consulting
Obsoletes: RFC4420 Dimitri Papadimitriou Obsoletes: RFC4420 Dimitri Papadimitriou
Updates: RFC3209, RFC3473 Alcatel Updates: RFC3209, RFC3473 Alcatel
Category: Standards Track Jean-Philippe Vasseur Category: Standards Track Jean-Philippe Vasseur
Created: March 15, 2008 Cisco Systems, Inc. Created: May 27, 2008 Cisco Systems, Inc.
Expires: September 15, 2008 Arthi Ayyangar Expires: November 27, 2008 Arthi Ayyangar
Juniper Networks Juniper Networks
Encoding of Attributes for Multiprotocol Label Switching (MPLS) Encoding of Attributes for Multiprotocol Label Switching (MPLS)
Label Switched Path (LSP) Establishment Using RSVP-TE Label Switched Path (LSP) Establishment Using RSVP-TE
draft-ietf-ccamp-rfc4420bis-02.txt draft-ietf-ccamp-rfc4420bis-03.txt
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 other Task Force (IETF), its areas, and its working groups. Note that other
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12. Security Considerations .......................................18 12. Security Considerations .......................................18
13. Acknowledgements ..............................................19 13. Acknowledgements ..............................................19
14. Changes from RFC 4420 to RFC XXXX .............................19 14. Changes from RFC 4420 to RFC XXXX .............................19
15. Normative References ..........................................19 15. Normative References ..........................................19
16. Informative References ........................................20 16. Informative References ........................................20
17. Authors' Addresses ............................................20 17. Authors' Addresses ............................................20
1. Introduction and Problem Statement 1. Introduction and Problem Statement
This document replaces and obsoletes the previous version of this This document replaces and obsoletes the previous version of this
work published as RFC 4420. The only change is in the encoding of the work published as RFC 4420 [RFC4420]. The only change is in the
Type-Length-Variable (TLV) data structures presented in Section 3. encoding of the Type-Length-Variable (TLV) data structures presented
See Section 14 for a summary of changes. in Section 3. See Section 14 for a summary of changes.
Traffic-Engineered Multiprotocol Label Switching (MPLS) Label Traffic-Engineered Multiprotocol Label Switching (MPLS) Label
Switched Paths (LSPs) [RFC3031] may be set up using the Path message Switched Paths (LSPs) [RFC3031] may be set up using the Path message
of the RSVP-TE signaling protocol [RFC3209]. The Path message of the RSVP-TE signaling protocol [RFC3209]. The Path message
includes the SESSION_ATTRIBUTE object, which carries a Flags field includes the SESSION_ATTRIBUTE object, which carries a Flags field
used to indicate desired options and attributes of the LSP. used to indicate desired options and attributes of the LSP.
The Flags field in the SESSION_ATTRIBUTE object has eight bits. Just The Flags field in the SESSION_ATTRIBUTE object has eight bits. Just
three of those bits are assigned in [RFC3209]. A further two bits three of those bits are assigned in [RFC3209]. A further two bits
are assigned in [RFC4090] for fast re-reroute functionality leaving are assigned in [RFC4090] for fast re-reroute functionality leaving
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An LSR that recognizes an attribute, but does not wish to support the An LSR that recognizes an attribute, but does not wish to support the
attribute, reacts according to the definition of the attribute in the attribute, reacts according to the definition of the attribute in the
defining RFC. This may allow the LSR to ignore the attribute and defining RFC. This may allow the LSR to ignore the attribute and
forward it unchanged, or may require it to fail the LSP setup. The forward it unchanged, or may require it to fail the LSP setup. The
LSR may additionally be required to report whether it supports the LSR may additionally be required to report whether it supports the
attribute using the RRO Attributes subobject. attribute using the RRO Attributes subobject.
11. IANA Considerations 11. IANA Considerations
The IANA allocations made for RFC 4420 now apply to this document The IANA allocations made for RFC 4420 [RFC4420] now apply to this
and are listed here for completeness. document and are listed here for completeness.
This document makes no further requests for IANA action, but IANA This document makes no further requests for IANA action, but IANA
should update the registry entries created for RFC 4420 to reference should update the registry entries created for RFC 4420 to reference
this document which is now the normative reference for those entries. this document which is now the normative reference for those entries.
11.1. New RSVP C-Nums and C-Types 11.1. New RSVP C-Nums and C-Types
Two new RSVP C-Nums are defined in this document and have been Two new RSVP C-Nums are defined in this document and have been
assigned by IANA. assigned by IANA.
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Thanks to the OIF for noticing the discrepency in RFC 4420 that is Thanks to the OIF for noticing the discrepency in RFC 4420 that is
fixed in this document. Alfred Hoenes noted several typographical fixed in this document. Alfred Hoenes noted several typographical
errors. errors.
14. Changes from RFC 4420 to RFC XXXX 14. Changes from RFC 4420 to RFC XXXX
[RFC Editor - Please replace "XXXX" with the RFC number assigned for [RFC Editor - Please replace "XXXX" with the RFC number assigned for
this work and remove this note.] this work and remove this note.]
This document obsoletes RFC 4420. The only change is in Section 3. This document obsoletes RFC 4420 [RFC4420]. The only change is in
Section 3 describes the semantic of the Length field of the Section 3. Section 3 describes the semantic of the Length field of
Attributes TLV. the Attributes TLV.
Prior to the change, the Length field indicated the length of the Prior to the change, the Length field indicated the length of the
Value field only. After the change, as described in Section 3, the Value field only. After the change, as described in Section 3, the
Length field indicates the length of the whole TLV. This change means Length field indicates the length of the whole TLV. This change means
that this document is consistent with the subobject format defined in that this document is consistent with the subobject format defined in
[RFC3209] and the TLV format defined in [RFC3471]. [RFC3209] and the TLV format defined in [RFC3471].
15. Normative References 15. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
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[RFC4090] Pan, P., Swallow, G., and A. Atlas, "Fast Reroute [RFC4090] Pan, P., Swallow, G., and A. Atlas, "Fast Reroute
Extensions to RSVP-TE for LSP Tunnels", RFC 4090, May Extensions to RSVP-TE for LSP Tunnels", RFC 4090, May
2005. 2005.
[RFC4206] Kompella, K. and Y. Rekhter, "Label Switched Paths (LSP) [RFC4206] Kompella, K. and Y. Rekhter, "Label Switched Paths (LSP)
Hierarchy with Generalized Multi-Protocol Label Switching Hierarchy with Generalized Multi-Protocol Label Switching
(GMPLS) Traffic Engineering (TE)", RFC 4206, October (GMPLS) Traffic Engineering (TE)", RFC 4206, October
2005. 2005.
[RFC4420] Farrel, A., Ed., Papadimitriou, D., Vasseur, J.-P., and
A. Ayyangar, "Encoding of Attributes for Multiprotocol
Label Switching (MPLS) Label Switched Path (LSP)
Establishment Using Resource ReserVation Protocol-Traffic
Engineering (RSVP-TE)", RFC 4420, February 2006.
17. Authors' Addresses 17. Authors' Addresses
Adrian Farrel Adrian Farrel
Old Dog Consulting Old Dog Consulting
Phone: +44 (0) 1978 860944 Phone: +44 (0) 1978 860944
EMail: adrian@olddog.co.uk EMail: adrian@olddog.co.uk
Dimitri Papadimitriou Dimitri Papadimitriou
Alcatel Alcatel
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