draft-ietf-isis-gmpls-extensions-18.txt   draft-ietf-isis-gmpls-extensions-19.txt 
Network Working Group K. Kompella, Editor Network Working Group K. Kompella, Editor
Internet Draft Y. Rekhter, Editor Internet Draft Y. Rekhter, Editor
Category: Informational Juniper Networks Category: Informational Juniper Networks
Updates: <isis te> October 2003 Updates: <isis te> October 2003
Expires: April 2004 Expires: April 2004
IS-IS Extensions in Support of Generalized IS-IS Extensions in Support of Generalized
Multi-Protocol Label Switching Multi-Protocol Label Switching
draft-ietf-isis-gmpls-extensions-18.txt draft-ietf-isis-gmpls-extensions-19.txt
Status of this Memo 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.
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Specification of Requirements Specification of Requirements
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in RFC 2119 [RFC2119]. document are to be interpreted as described in RFC 2119 [RFC2119].
Changes since last revision Changes since last revision
(RFC Editor: remove this section before publication.) (RFC Editor: remove this section before publication.)
Incorporated IESG comments on the GMPLS OSPF document. Incorporated IESG comments: updated Security Considerations and IANA
Considerations.
More formatting changes.
1. Introduction 1. Introduction
This document specifies extensions to the IS-IS routing protocol in This document specifies extensions to the IS-IS routing protocol in
support of carrying link state information for Generalized support of carrying link state information for Generalized
Multi-Protocol Label Switching (GMPLS). The set of required Multi-Protocol Label Switching (GMPLS). The set of required
enhancements to IS-IS are outlined in [GMPLS-ROUTING]. Support for enhancements to IS-IS are outlined in [GMPLS-ROUTING]. Support for
unnumbered interfaces assumes support for the "Point-to-Point unnumbered interfaces assumes support for the "Point-to-Point
Three-Way Adjacency" IS-IS Option type [ISIS-3way]. Three-Way Adjacency" IS-IS Option type [ISIS-3way].
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|Protection Cap | Reserved | |Protection Cap | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
The first octet is a bit vector describing the protection The first octet is a bit vector describing the protection
capabilities of the link (see Section "Link Protection Type" of capabilities of the link (see Section "Link Protection Type" of
[GMPLS-ROUTING]). They are: [GMPLS-ROUTING]). They are:
0x01 Extra Traffic 0x01 Extra Traffic
0x02 Unprotected
0x02 Unprotected
0x04 Shared 0x04 Shared
0x08 Dedicated 1:1 0x08 Dedicated 1:1
0x10 Dedicated 1+1 0x10 Dedicated 1+1
0x20 Enhanced 0x20 Enhanced
0x40 Reserved 0x40 Reserved
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Vishal Sharma Vishal Sharma
EMail: v.sharma@ieee.org EMail: v.sharma@ieee.org
4. Acknowledgements 4. Acknowledgements
The authors would like to thank Jim Gibson, Suresh Katukam, Jonathan The authors would like to thank Jim Gibson, Suresh Katukam, Jonathan
Lang and Quaizar Vohra for their comments on the draft. Lang and Quaizar Vohra for their comments on the draft.
5. Security Considerations 5. Security Considerations
This document raises no new security concerns for IS-IS. This document specifies the contents of GMPLS TE TLVs in ISIS. As
these TLVs are not used for SPF computation or normal routing, the
extensions specified here have no direct effect on IP routing.
Tampering with GMPLS TE TLVs may have an effect on the underlying
transport (optical and/or SONET-SDH) network. Mechanisms to secure
ISIS Link State PDUs and/or the TE TLVs can be used to secure the
GMPLS TE TLVs as well.
6. IANA Considerations
This document defines the following new ISIS TLV type that needs to
be reflected in the ISIS TLV code-point registry:
Type Description IIH LSP SNP
---- ---------------------- --- --- ---
138 Shared Risk Link Group n y n
This document also defines the following new sub-TLV types of
top-level TLV 22 that need to be reflected in the ISIS sub-TLV
registry for TLV 22:
Type Description Length
---- ------------------------------ --------
4 Link Local/Remote Identifiers 8
20 Link Protection Type 2
21 Interface Switching Capability variable
Descriptor
Normative References Normative References
[GMPLS-ROUTING] Kompella, K., and Rekhter, Y. (Editors), "Routing [GMPLS-ROUTING] Kompella, K., and Rekhter, Y. (Editors), "Routing
Extensions in Support of Generalized Multi-Protocol Label Extensions in Support of Generalized Multi-Protocol Label
Switching", (work in progress) [draft-ietf-ccamp-gmpls- Switching", (work in progress) [draft-ietf-ccamp-gmpls-
routing-08.txt] routing-08.txt]
[GMPLS-RSVP] Berger, L., (Editor), "Generalized Multi-Protocol Label [GMPLS-RSVP] Berger, L., (Editor), "Generalized Multi-Protocol Label
Switching (GMPLS) Signaling Resource ReserVation Protocol-Traffic Switching (GMPLS) Signaling Resource ReserVation Protocol-Traffic
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