Applicable Environment
In the traditional PIM-SM domain, each multicast group is mapped to only one RP. When the
network is overloaded or burst traffic is transmitted, many network problems occur. For example,
the load of RP is too heavy; routes converge slowly after RP fails; the multicast forwarding path
is not the optimal path.
You can use the anycast RP in a PIM-SM domain. A multicast source then registers to the nearest
RP and a receiver joins the nearest RP. In this case, the load of a single RP is reduced, the RP
is backed up, and the forwarding path is optimized.
The following configuration scheme is recommended:
l Configure an interface on each S9300 in the PIM-SM domain as the loopback interface,
configure the loopback interfaces with the same IP address, and advertise the IP address in
unicast routing mode.
l Configure the loopback interfaces on the S9300s as C-RPs, or configure the addresses on
all S9300s in the PIM-SM domain as static RPs.
l Establish MSDP peer relation between the S9300s. If more than three S9300s exist,
establish the MSDP peer relation between the S9300s and add them to the same mesh group.
l Specify the logical RP address for SA messages exchanged between these MSDP peers.
Pre-configuration Tasks
Before configuring the anycast RP, complete the following tasks:
l Configuring the unicast routing protocol to ensure the IP routes between nodes are
reachable
l Configuring the PIM-SM domain without RPs
Data Preparation
To configure the anycast RP, you need the following data.
No.
Data
1 RP address
2 Name and number of the interface on the local
MSDP peer and address of the local MSDP
peer
3 Name and number of the interface on the
remote MSDP peer and address of the remote
MSDP peer
4 Description of the MSDP peer
5.6.2 Configuring the IP Address of an RP
Quidway S9300 Terabit Routing Switch
Configuration Guide - Multicast 5 MSDP Configuration
Issue 01 (2009-07-28) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
5-13
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