BIER Ingress Multicast Flow Overlay using Multicast Listener

BIER Ingress Multicast Flow Overlay using Multicast Listener Discovery Protocols draft-pfister-bier-mld-00 Pierre Pfister – IJsbrand Wijnands – Markus Stenberg draft-pfister-bier-mld 22/07/15 0

BIER stack status Control traffic Assigns Bits Insert + Remove header Forward BIER packets draft-pfister-bier-mld Multicast Flow Overlay draft-pfister-bier-mld BIER Layer draft-ietf-bier-isis-extensions draft-ietf-bier-ospf-bier-extensions Routing Underlay draft-ietf-bier-mpls-encapsulation 22/07/15 1

Solution Scope This proposal does not intend to boil the ocean (or make coffee). Distributed Target Centralized Small Networks draft-pfister-bier-mld Large Networks 22/07/15 2

MLDv 2 / IGMPv 3 - Relies on all-nodes + all-queriers multicast on a single multicast capable link MLDv 2/IGMPv 3 Queriers Elected Querier Multicast Capable Link MLDv 2/IGMPv 3 Listeners draft-pfister-bier-mld 22/07/15 3

BMLD - Relies on all-BMLD-Nodes + all-BMLD-Queriers multicast in a single BIER domain BMLD Queriers Elected Querier BIER Multicast Domain BMLD Listeners draft-pfister-bier-mld 22/07/15 4

Configuration Parameters - A multicast address for BMLD-All-Queriers (Traffic Ingress) - A multicast address for BMLD-All-Nodes (Traffic Egress + Ingress) - BFR-ID of BMLD Queriers - BFR-ID of BMLD Listeners Could be dynamic (Advertised with BFR-IDs…) - Configure the BIER Layer with such info. To be able to send packets to BMLD-All-Queriers and BMLD-All-Nodes multicast groups. draft-pfister-bier-mld 22/07/15 5

Functionning details - Send BMLD Queries with: • BMLD-All-Nodes destination group address • Sender’s BFR Prefix Address source address • No hop-by-hop Alert Option - Send BMLD Reports with: • BMLD-All-Queriers destination group address • Sender’s BFR Prefix Address source address • No hop-by-hop Alert Option - Queriers do MLDv 2/IGMPv 3 processing with explicit tracking. draft-pfister-bier-mld 22/07/15 6

Forwarding entering packets Mapping by MLD Explicit Tracking Membership Mapping by BIER Control Plane BFR-Prefix BFRID Mapping provided to BIER Layer draft-pfister-bier-mld 22/07/15 7

Open Issues - Prevent duplicated traffic from entering the network - A forwarder could subscribe to traffic and react when duplicated traffic is detected (Tie breaking with BFR-Prefix – No more signaling required). Define messages ? Extension to MLDv 2 ? - Prevent duplicated packet from leaving the network - Handled by the next-domain flow overlay ? draft-pfister-bier-mld 22/07/15 8

Thanks Questions ? draft-pfister-bier-mld 22/07/15 9