Controlling The Source Information Forwarded - H3C S9500 Series Operation Manual

Operation Manual – MSDP
H3C S9500 Series Routing Switches
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.
Perform the following operations in MSDP view to filter the multicast routing entries
imported or remove the configuration:
Advertise only the (S, G) entries
permitted by the ACL
Remove the above configuration
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.
II. Filtering SA request messages
Perform the following operations in MSDP view to filter SA request messages or
remove the configuration:
Filter all the SA request messages from
a specified MSDP peer
Filter the SA request messages of the
groups of a specified MSDP peer
permitted by the basic ACL from
Remove the configuration of filtering SA
request messages
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.
Multicast group addresses are described in ACL. If no ACL is specified, all SA request
messages sent by the corresponding MSDP peer will be ignored. If an ACL is specified,
only SA request messages of the groups permitted by the ACL will be processed.

1.2.9 Controlling the Source Information Forwarded

Controlling of source information also includes that of forwarding and receiving source
information besides that of creating source information. The outbound filter or time to
live (TTL) threshold of SA messages can be used to control the SA message forwarding.
By default, all SA messages are forwarded to other MSDP peers.
I. Using MSDP outbound filter
MSDP outbound filter of are functional in:
To do...
To do...
1-8
Chapter 1 MSDP Configuration
Use the command...
import-source [ acl acl-number ]
undo import-source
Use the command...
peer peer-address sa-request-policy
peer peer-address sa-request-policy
acl acl-number
undo peer peer-address
sa-request-policy