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Use of Wildcard in S-PMSI Auto. Discovery Routes draft-rekhter-mvpn-wildcard-spmsi Rahul Aggarwal (Juniper) Wim Henderickx Use of Wildcard in S-PMSI Auto. Discovery Routes draft-rekhter-mvpn-wildcard-spmsi Rahul Aggarwal (Juniper) Wim Henderickx (Alcatel-Lucent) Praveen Muley (Alcatel-Lucent) Ray Qiu (Alcatel-Lucent) Yakov Rekhter (Juniper)

Background (1) • draft-ietf-l 3 vpn-2547 bis-mcast-bgp (already) defines S-PMSI encoding/procedures for aggregating multiple Background (1) • draft-ietf-l 3 vpn-2547 bis-mcast-bgp (already) defines S-PMSI encoding/procedures for aggregating multiple C-multicast flows onto a single P-Multicast tree – “A PE MAY aggregate two or more S-PMSIs originated by the PE onto the same P-Multicast tree” (Section 12. 1 of draft-ietf-l 3 vpn-2547 bis-mcast -bgp) – C-multicast flows may belong to either the same, or different MVPNs – Aggregation is controlled by the PE that is the root of the P-Multicast tree • This is accomplished by PE advertising the same P-Multicast tree in all the S-PMSI A-D routes for these C-flows • draft-ietf-l 3 vpn-2547 bis-mcast-bgp procedures for aggregating S-PMSIs improve control AND data plane scalability on P routers – By reducing the number of P-Multicast trees • draft-ietf-l 3 vpn-2547 bis-mcast-bgp procedures for aggregating S-PMSIs also improve data plane scalability on PE routers – By reducing the number of P-Multicast trees

Background (2) • However, encoding/procedures specified in draft-ietfl 3 vpn-2547 bis-mcast-bgp limit the granularity Background (2) • However, encoding/procedures specified in draft-ietfl 3 vpn-2547 bis-mcast-bgp limit the granularity of a single S -PMSI A-D route to a single (C-S, C-G) C-multicast flow • Removing this limitation could improve control plane scalability on PE routers and Route Reflectors – By reducing the number of S-PMSI A-D routes • Removing this limitation will have no impact on P routers, and no impact on the data plane of PE routers • draft-rekhter-mvpn-wildcard-spmsi specifies extensions to the encoding/procedures (already) specified in draft-ietfl 3 vpn-2547 bis-mcast-bgp that remove this limitation – Extensions to sections 4. 3, 12. 1, and 12. 3 of draft-ietf-l 3 vpn -2547 bis-mcast-bgp – Extensions are OPTIONAL

Possible applications (1) • (C-*, C-G) applications: – C-G is in the ASM range: Possible applications (1) • (C-*, C-G) applications: – C-G is in the ASM range: • PE connected to a site that contains C-RP uses a single (C-*, C-G) S-PMSI A-D route to advertise aggregation onto a single P-Multicast tree of all (C-Ss, C-G) flows for the same C -G traveling along the customer’s RPT tree • PE uses a single (C-*, C-G) S-PMSI A-D route to advertise aggregation onto a single P-Multicast tree of all (C-Ss, C-G) flows for the same C-G traveling along customer’s SPT trees for all the C-Ss within the MVPN sites connected to that PE – C-G is in the PIM-Bidir range: • PE uses a single (C-*, C-G) S-PMSI A-D route to advertise aggregation onto a single P-Multicast tree of all (C-Ss, C-G) flows for the same C-G for all the C-Ss within the MVPN sites connected to a given PE

Possible applications (2) • (C-S, C-*) applications: – C-S originates (multiple) PIM-SM in SSM Possible applications (2) • (C-S, C-*) applications: – C-S originates (multiple) PIM-SM in SSM mode (multicast) streams • PE uses a single (C-S, C-*) S-PMSI A-D route to advertise aggregation onto a single P-Multicast tree of all (C-S, C-Gs) SSM flows originated by the same C-S – C-S is within a site connected to that PE

Possible applications (3) • (C-*, C-*) applications: – MVPN runs in “S-PMSI only” mode: Possible applications (3) • (C-*, C-*) applications: – MVPN runs in “S-PMSI only” mode: • PE uses a single (C-*, C-*) S-PMSI A-D route to advertise aggregation onto a single P-Multicast tree of all (C-S, C-G)s flows originated within the MVPN sites connected to that PE – Except for the flows that the PE already advertises in either (C-S, C-G) S-PMSI A-D routes, or (C-*, C-G) SPMSI A-D routes, or (C-S, C-*) S-PMSI A-D routes