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AII Types for Aggregation draft-metz-aii-aggregate-01.txt

Chris Metz, chmetz@cisco.com Luca Martini, lmartini@cisco.com Florin Balus, balus@nortel.com Jeff Sugimoto, sugimoto@nortel.com Vacouver IETF Nov. 2005. AII Types for Aggregation draft-metz-aii-aggregate-01.txt. Changes from -00. Added PWid AII Type (Type 1)

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AII Types for Aggregation draft-metz-aii-aggregate-01.txt

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  1. Chris Metz, chmetz@cisco.com Luca Martini, lmartini@cisco.com Florin Balus, balus@nortel.com Jeff Sugimoto, sugimoto@nortel.com Vacouver IETF Nov. 2005 AII Types for Aggregationdraft-metz-aii-aggregate-01.txt

  2. Changes from -00 • Added PWid AII Type (Type 1) • compatibility with L2VPN signaling draft • FEC129 signaling support of attachment circuits provisioned with 32-bit identifier (i.e. PWid from FEC128) • Short and Long Prefix AII Type fields adjustments: • Global ID is 6 bytes in length (big enough to accommodate 2 and 4 octet ASN or IPv6 /48 as global identifiers) • flags field removed • Removed aggregation examples • Streamlined text

  3. PWid AII Type (Type 1) 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 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | AII Type=01 | Length | PWid | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | PWid (contd.) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ • Used where provisioning model required fixed-length 32-bit AII value • draft-ietf-l2vpn-signaling-06.txt • FEC129 signaling of older PWid-configured attachment circuits • section 2.1 of draft

  4. Short Prefix AII Type (Type 2) 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 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | AII Type=02 | Length | Global ID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Global ID (contd.) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Prefix | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | AC ID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ • Used where provisioning model (e.g. inter-domain VPWS) permits distribution of AII aggregates prior to PWE3 signaling • reduced scaling burden on AII distribution mechanisms (e.g. MP-BGP) and PE memory • section 2.2 of draft

  5. Long Prefix AII Type (Type 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 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | AII Type=03 | Length | Global ID | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Global ID (contd.) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | | | | | | Prefix | | | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ • Same use as Short Prefix except: • larger prefix field (256 bits vs 32 bits); no AC ID • offers greater numbering flexibility given larger prefix field • section 2.3 of draft

  6. Next Steps • Synced up with L2VPN signaling and dynamic MS-PW placement drafts • We need PWid AII Type for sure • … and we need Prefix-based AII Types (Short, Long or both) • Adopt as PWE3 WG document

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