Configuring The Transmission And Filtering Of Sa Request Messages - Huawei Quidway S3900 Series Operation Manual

Operation Manual – Multicast Protocol
Quidway S3900 Series Ethernet Switches-Release 1510
8.4.1 Configuration Prerequisites
Before you configure SA message transmission, perform the following tasks:
Configuring a unicast routing protocol.
Configuring basic IP multicast functions.
Configuring basic PIM-SM functions.
Configuring basic MSDP functions.
Table 8-7 Configuration tasks
Configure the transmission and filter
of SA request messages
Configure a rule for filtering the
multicast source of SA messages
Configure a rule for filtering received
and forwarded SA messages
Configure SA message cache

8.4.2 Configuring the Transmission and Filtering of SA Request Messages

After you enable sending SA request messages, when a router receives a Join
message, it sends an SA request message to the specified remote MSDP peer, which
responds with an SA message that it has cached. After sending an SA request
message, the router will get immediately a response from all active multicast sources.
By default, the router does not send an SA request message to its MSDP peers upon
receipt of a Join message; instead, it waits for the next SA message..
The SA message that the remote MSDP responds with is cached in advance; therefore,
you must enable the SA message caching mechanism in advance. Typically, only the
routers caching SA messages can respond to SA request messages.
After you have configured a rule for filtering received SA messages, if no ACL is
specified, all SA request messages sent by the corresponding MSDP peer will be
ignored; if an ACL is specified, the SA request messages that satisfy the ACL rule are
received while others are ignored.
Operation
Huawei Technologies Proprietary
8-12
Chapter 8 MSDP Configuration
Description Related section
Section 8.4.2
the
Optional
Filtering
Messages
Section 8.4.3 Configuring a
Rule
Optional
Multicast Sources of SA
Messages
Section 8.4.4 Configuring a
Rule for Filtering Received
Optional
and
Messages
Section 8.4.5
Optional
SA Message Cache
Configuring
Transmission and
of SA Request
for Filtering the
Forwarded SA
Configuring