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AII Types for Aggregation: Improving Provisioning Efficiency in Networking

This draft proposes new AII types for aggregation to enhance networking efficiency, including PWid Type 1, Short Prefix Type 2, and Long Prefix Type 3, catering to various provisioning needs and streamlining AII distribution mechanisms.

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AII Types for Aggregation: Improving Provisioning Efficiency in Networking

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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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