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Configuration Guide - IP Multicast

S7700 and S9700 V200R013C00

This document describes the configurations of IP multicast, including IP multicast basics, IGMP, MLD, IPv4 PIM, IPv6 PIM, MSDP, multicast VPN, layer 3 multicast CAC, IPv4 multicast route management, IPv6 multicast route management, IGMP snooping, MLD snooping, static multicast MAC address, multicast VLAN replication, layer 2 multicast CAC, multicast network management.
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Inter-AS Multicast Using MBGP and MSDP

Inter-AS Multicast Using MBGP and MSDP

Both Multiprotocol Border Gateway Protocol (MBGP) and MSDP connections are TCP connections. Two MSDP peers can set up an MBGP peer relationship to ensure that SA messages can pass RPF checks.

Figure 6-7  Inter-AS multicast using MBGP and MSDP

As shown in Figure 6-7, the RPs in different PIM-SM domains are not directly connected to each other, and the RPs and ASBRs are deployed on different routers. After the RPs set up an MSDP peer relationship, they can also set up an MBGP peer relationship to ensure that SA messages can pass RPF checks.

  • IBGP: sets up IBGP peer relationships between RPs in the same AS, such as RP1 and RP2, and RP3 and RP4.

  • EBGP: sets up EBGP peer relationships between RPs in different ASs, such as RP1 and RP3, and RP2 and RP4.

The MBGP and MSDP peer relationship must be set up on the same interface. MBGP and MSDP are often used together. For details about MBGP, see BGP Configuration in the S7700 and S9700 V200R013C00 Configuration Guide - IP Unicast Routing.

Updated: 2019-04-08

Document ID: EDOC1100065742

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