Applicable Environment
When a large multicast network is divided into multiple PIM-SM domains, MSDP is used to
connect RPs of various domains to share the source information. In this manner, hosts in a domain
can receive multicast data sent by multicast sources in other domains.
To ensure that all RPs in the network can share the source information, reduce the scale of an
MSDP connected graph. It is recommended to configure MSDP peer relationships between all
RPs, including static RPs and C-RPs, in the network.
To ensure that SA messages transmitted between MSDP peers are not interrupted by RPF rules
and to reduce redundant traffic, the following solutions are recommended:
l Add MSDP peers in the same AS to one Mesh Group.
l If MSDP peers are in different ASs, select either of the following solutions:
– Establish an MBGP peer relationship and use the same interface address.
– Configure each other as a static RPF peer.
NOTE
Both BGP and MBGP can be used to set up inter-AS EBGP peer relationships. MBGP is recommended
because MBGP does not affect the unicast topology of a network.
Pre-configuration Tasks
Before configuring PIM-SM inter-domain multicast, complete the following tasks:
l Configuring a unicast routing protocol to enable interworking at the network layer
l Enabling IP multicast
l Configuring a PIM-SM domain to implement intra-domain multicast
Data Preparation
To configure PIM-SM inter-domain multicast, you need the following data.
No.
Data
1 Address of a remote MSDP peer
2 Type and number of the local interface connected to MSDP peers
3 Description of an MSDP peer
4 Name of a mesh group
7.3.2 Configuring Intra-AS MSDP Peers
When multiple PIM-SM domains exist in an AS or multiple RPs serving different multicast
groups exist in a PIM-SM domain, you are recommended to configure MSDP peer relationships
between all RPs (including static RPs and C-RPs) and add all MSDP peers to a mesh group.
Context
Do as follows on the RPs of all PIM-SM domains that belong to the same AS:
Quidway S7700 Smart Routing Switch
Configuration Guide - Multicast 7 MSDP Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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