Configuring The Transmission And Filtering Of Sa Request Messages; Configuring A Rule For Filtering The Multicast Sources Of Sa Messages - H3C S5600 SERIES Operation Manual

To do...
Enter MSDP view
Enable SA message caching
mechanism
Configure the maximum
number of SA messages that
can be cached

Configuring the Transmission and Filtering of SA Request Messages

After you enable the sending of 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. The SA message that the remote MSDP peer sends in response 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.
Follow these steps to configure the transmission and filtering of SA request messages:
To do...
Enter system view
Enter MSDP view
Enable SA message
caching mechanism
Enable MSDP peers to
send SA request
messages
Configure a rule for
filtering the SA
messages received by
an MSDP peer

Configuring a Rule for Filtering the Multicast Sources of SA Messages

An RP filters each registered source to control the information of active sources advertised in the SA
message. An MSDP peer can be configured to advertise only the (S, G) entries in the multicast routing
table that satisfy the filtering rule when the MSDP creates the SA message; that is, to control the (S, G)
entries to be imported from the multicast routing table to the PIM-SM domain. If the import-source
command is executed without the acl keyword, no source will be advertised in the SA message.
Follow these steps to configure a rule for filtering multicast sources using SA messages:
Use the command...
msdp
cache-sa-enable
peer peer-address
sa-cache-maximum sa-limit
Use the command...
system-view
msdp
cache-sa-enable
peer peer-address
request-sa-enable
peer peer-address
sa-request-policy [ acl
acl-number ]
5-12
Remarks
—
Optional
Enabled by default
Optional
The default is 2,048.
Remarks
—
—
Optional
By default, the router caches the SA
state upon receipt of an SA message.
Optional
By default, upon receipt of a Join
message, the router sends no SA
request message to its MSDP peer but
waits for the next SA message.
Optional
By default, a router receives all SA
request messages from the MSDP peer.