ISIS Route Tag sub-TLV draft-ietf-isis-admin-tags-02.txt Christian Martin (cmartin@gnilink.net) Brad Neal (bneal@broadwing.com) Stefano Previdi (sprevidi@cisco.com) 60th IETF, San Diego, August 2004

60th IETF, San Diego, August 2004 Summary New sub-TLV part of Extended IP Reachability TLV (135 and 235). Allow route colouring Use tag (colors) for SIMPLE policies Route propagation/leaking across levels Some technologies require propagation of host routes (router’s loopback addresses) across levels (i.e.: MPLS-VPN) Route redistribution across protocols Route prioritization during convergence 60th IETF, San Diego, August 2004

60th IETF, San Diego, August 2004 Sub-TLVs format Sub-TLV 1 (to be assigned by IANA) 1 byte Type (value: 1) 1 byte Length (value: multiple of 4) One or more instances of 4 bytes of admin tag Sub-TLV 2 (to be assigned by IANA) 1 byte Type (value: 2) 1 byte Length (value: multiple of 8) One or more instances of 8 bytes of admin tag 60th IETF, San Diego, August 2004

60th IETF, San Diego, August 2004 Sub-TLVs format An implementation may consider only one of the encoded tags, in which case the first encoded tag must be considered. A tag value of zero is reserved and should be treated as "no tag". There is no implied meaning to the ordering of the tags 60th IETF, San Diego, August 2004

60th IETF, San Diego, August 2004 Next Step… Implementations and deployments exist No outstanding issues No major changes expected WG document ? 60th IETF, San Diego, August 2004