3Com Switch 8800 Family Configuration Guide

MSDP Configuration 479
Please perform the following configurations in MSDP view.
The SA request message sent by a local RP will get the immediate response about
all active sources.
By default, the router does not send SA request message to its MSDP peer when
receiving the join message of a group. Instead, it waits for the arrival of SA
message of the next period.
Controlling the Source
Information Created
Filtering the multicast routing entries imported
RP filters the registered sources to control the information of the active sources
advertised in SA message. MSDP peers can be configured to only advertise the
qualified (S, G) entries in the multicast routing table when creating SA messages,
that is, to control the (S,G) entries imported from the multicast routing table to the
domain.
Please perform the following configurations in MSDP view.
By default, only intra-domain sources are advertised in SA messages.
If the import-source command without acl parameter is executed, no source is
advertised in SA messages.
Filtering SA request messages
Please perform the following configurations in MSDP view.
By default, only the routers which caches SA messages can respond to SA request
messages. Routers receive all SA request messages from its MSDP peers.
Tab le 471 Request source information of MSDP peers
Operation Command
Configure the router to send SA request
message to the specified MSDP peer when
receiving the join message of a group
peer peer-address request-sa-enable
Restore the default configuration undo peer peer-address request-sa-enable
Tab le 472 Filter the multicast routing entries imported
Operation Command
Advertise only the (S, G) entries permitted by
the ACL
import-source [ acl acl-number ]
Remove the above configuration undo import-source
Tab le 473 Filter SA request messages
Operation Command
Filter all the SA request messages from a
specified MSDP peer
peer peer-address sa-request-policy
Filter the SA request messages of the groups
of a specified MSDP peer permitted by the
basic ACL from
peer peer-address sa-request-policy acl
acl-number
Remove the configuration of filtering SA
request messages
undo peer peer-address sa-request-policy