draft-ietf-isis-gmpls-extensions-12.txt   draft-ietf-isis-gmpls-extensions-13.txt 
Network Working Group K. Kompella (Juniper Networks) Network Working Group K. Kompella (Juniper Networks)
Internet Draft Y. Rekhter (Juniper Networks) Internet Draft Y. Rekhter (Juniper Networks)
Expiration Date: November 2002 A. Banerjee (Calient Networks) Expiration Date: December 2002 A. Banerjee (Calient Networks)
J. Drake (Calient Networks) J. Drake (Calient Networks)
G. Bernstein (Ciena) G. Bernstein (Ciena)
D. Fedyk (Nortel Networks) D. Fedyk (Nortel Networks)
E. Mannie (GTS Network) E. Mannie (GTS Network)
D. Saha (Tellium) D. Saha (Tellium)
V. Sharma (Metanoia, Inc.) V. Sharma (Metanoia, Inc.)
IS-IS Extensions in Support of Generalized MPLS IS-IS Extensions in Support of Generalized MPLS
draft-ietf-isis-gmpls-extensions-12.txt draft-ietf-isis-gmpls-extensions-13.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 7, line 10 skipping to change at page 7, line 10
Capability Descriptor (see Section "Interface Switching Capability Capability Descriptor (see Section "Interface Switching Capability
Descriptor" of [GMPLS-ROUTING]) the Interface Switching Capability Descriptor" of [GMPLS-ROUTING]) the Interface Switching Capability
Descriptor sub-TLV may occur more than once within the extended IS Descriptor sub-TLV may occur more than once within the extended IS
reachability TLV. reachability TLV.
6.4. Shared Risk Link Group TLV 6.4. Shared Risk Link Group TLV
The SRLG TLV (of type 138 TBD) contains a data structure consisting The SRLG TLV (of type 138 TBD) contains a data structure consisting
of: of:
7 octets of System ID and Pseudonode Number 6 octets of System ID
1 octet of Pseudonode Number
1 octet Flag 1 octet Flag
4 octets of IPv4 interface address or 4 octets of a Link Local 4 octets of IPv4 interface address or 4 octets of a Link Local
Identifier Identifier
4 octets of IPv4 neighbor address or 4 octets of a Link Remote 4 octets of IPv4 neighbor address or 4 octets of a Link Remote
Identifier Identifier
and a list of SRLG values, where each element in the list has 4 and a list of SRLG values, where each element in the list has 4
octets. The length of this TLV is 16 + 4 * (number of SRLG values). octets. The length of this TLV is 16 + 4 * (number of SRLG values).
The Least Significant Bit of the Flag octet indicates whether the The Least Significant Bit of the Flag octet indicates whether the
interface is numbered (set to 1), or unnumbered (set to 0). All other interface is numbered (set to 1), or unnumbered (set to 0). All other
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The neighbor is identified by its System Id (6-octets), plus one The neighbor is identified by its System Id (6-octets), plus one
octet to indicate the pseudonode number if the neighbor is on a LAN octet to indicate the pseudonode number if the neighbor is on a LAN
interface. interface.
0 1 2 3 0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| System ID | | System ID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| System ID (cont.) | Pseudonode num| | System ID (cont.) | Pseudonode num| Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| IPv4 interface address/Link Local Identifier |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| IPv4 neighbors address/Link Remote Identifier |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Shared Risk Link Group Value | | Shared Risk Link Group Value |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ............ | | ............ |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Shared Risk Link Group Value | | Shared Risk Link Group Value |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
This TLV carries the Shared Risk Link Group information (see Section This TLV carries the Shared Risk Link Group information (see Section
"Shared Risk Link Group Information" of [GMPLS-ROUTING]). "Shared Risk Link Group Information" of [GMPLS-ROUTING]).
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topology changes. TE graceful restart need not be aborted if a TE LSA topology changes. TE graceful restart need not be aborted if a TE LSA
or TE topology changes. or TE topology changes.
8. Security Considerations 8. Security Considerations
The extensions proposed in this document does not raise any new The extensions proposed in this document does not raise any new
security concerns. security concerns.
9. Acknowledgements 9. Acknowledgements
The authors would like to thank Suresh Katukam, Jonathan Lang and The authors would like to thank Jim Gibson, Suresh Katukam, Jonathan
Quaizar Vohra for their comments on the draft. Lang and Quaizar Vohra for their comments on the draft.
10. References 10. References
[ISIS-TE] Smit, H., Li, T., "IS-IS Extensions for Traffic [ISIS-TE] Smit, H., Li, T., "IS-IS Extensions for Traffic
Engineering", Engineering",
draft-ietf-isis-traffic-03.txt (work in progress) draft-ietf-isis-traffic-03.txt (work in progress)
[GMPLS-SIG] Generalized MPLS Group, "Generalized MPLS - Signaling [GMPLS-SIG] Generalized MPLS Group, "Generalized MPLS - Signaling
Functional Functional
Description", draft-ietf-mpls-generalized-signaling-04.txt (work Description", draft-ietf-mpls-generalized-signaling-04.txt (work
 End of changes. 

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