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Upstream mapping in Echo Request

Upstream mapping in Echo Request. draft-ankur-mpls-upstream-mapping-00. Ankur Saxena , Mahesh Jethanandani. IETF 89, March 2014, London, UK. Agenda. Problem Statement Introduction Update. Problem Statement. Co-routed LSP is not working MPLS ping – no response

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Upstream mapping in Echo Request

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  1. Upstream mapping in Echo Request draft-ankur-mpls-upstream-mapping-00 AnkurSaxena, Mahesh Jethanandani IETF 89, March 2014, London, UK

  2. Agenda • Problem Statement • Introduction • Update

  3. Problem Statement • Co-routed LSP is not working • MPLS ping – no response • MPLS traceroute – downstream path • Upstream ?

  4. Introduction • Add upstream information to trace-route when trace-route is sent over a co-routed network path.

  5. Updates • Updates trace-route mechanism defined in RFC 4379 • Verify both DSMap and UpStreamMap (UPMap)

  6. UPMap • Similar to DSMap the UPMap TLV will have following information 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 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | MTU | Address Type | DS Flags | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Upstream IP Address (4 or 16 octets) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Upstream Interface Address (4 or 16 octets) | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Multipath Type| Depth Limit | Multipath Length | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ . . . (Multipath Information) . . . +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Upstream Label | Protocol | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ . . +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Upstream Label | Protocol | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

  7. Theory of Ops • LER1 sends packet with DSMap for Label L0 and UPMap for L1 • LSR validates DSMap • If DSMap doesn’t match return DSMapmis-match. • LSR “validates” UPMap • If UPMap does not match return UPMapmis-match • If both UPMap and DSMap do not match return both Maps as mis-match • If both match send UPMap information for L3 L2 L0 LER1 LSR LER2 L1 L3

  8. Theory of Ops (cont.) • LER1 receives the trace-route reply message • - Copies the DSMapfor L2 and UPMap for L3 and sends it to LER2 • LER2 validates DSMap. • - If DSMap doesn’t match return DSMapmis-match. • LER2 “validates” UPMap L2 L0 LER1 LSR LER2 L1 L3

  9. Help • How to truly validate the upstream path? L2 L0 LER1 LSR LER2 L1 L3

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