l When the local switch wants to receive (S, G) information, it sends an SA Request message
to a specified remote MSDP peer.
l On receiving the SA Request message, the MSDP peer responds to the SA Request message
with the required (S, G) information. If the "filtering rule of SA Request message" is
configured on the remote MSDP peer, it checks the SA Request messages received from a
specified peers and determines whether to respond according to the checking results.
Pre-configuration Tasks
Before configuring an SA request, complete the following tasks:
l Configuring a unicast routing protocol to implement interconnection at the network layer
l Enabling IP multicast
l Configuring a PIM-SM domain to implement intra-domain multicast
l Configuring PIM-SM Inter-domain Multicast or Configuring an Anycast RP in a
PIM-SM Domain
Data Preparation
To configure an SA request, you need the following data.
No. Data
1 Address of a remote MSDP peer
2 Filtering list for receiving SA request messages
7.7.2 Configuring "Sending SA Request Messages" on the Local
switch
When a device receives a new Join message and no corresponding (S, G) entry exists locally or
in the SA cache, the device immediately sends an SA Request message to the specified MSDP
peer rather than waits for the SA message in the next period.
Context
Do as follows on the local switch:
Procedure
Step 1 Run:
system-view
The system view is displayed.
Step 2 Run:
msdp [ vpn-instance vpn-instance-name ]
The MSDP view is displayed.
Step 3 Run:
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.
244
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