Configuring An Sa Message Filtering Rule - H3C S7500E Series Operation Manual

Operation Manual – Multicast
H3C S7500E Series Ethernet Switches
Configure a filtering rule
for SA request messages
Caution:
Before you can enable the device to send SA requests, be sure to disable the SA
message cache mechanism.

6.5.4 Configuring an SA Message Filtering Rule

By configuring an SA message creation rule, you can enable the router to filter the (S, G)
entries to be advertised when creating an SA message, so that the propagation of
messages of multicast sources is controlled.
In addition to controlling SA message creation, you can also configure filtering rules for
forwarding and receiving SA messages, so as to control the propagation of multicast
source information in the SA messages.
By configuring a filtering rule for receiving or forwarding SA messages, you can
enable the router to filter the (S, G) forwarding entries to be advertised when
receiving or forwarding an SA message, so that the propagation of multicast
source information is controlled at SA message reception or forwarding.
An SA message with encapsulated multicast data can be forwarded to a
designated MSDP peer only if the TTL value in its IP header exceeds the threshold.
Therefore, you can control the forwarding of such an SA message by configuring
the TTL threshold of the encapsulated data packet.
Follow these steps to configure a filtering rule for receiving or forwarding SA messages:
Enter system view
Enter MSDP view
Configure an SA message
creation rule
Configure a filtering rule
for receiving or forwarding
SA messages
To do...
peer peer-address
sa-request-policy [ acl
acl-number ]
To do...
system-view
msdp
import-source [ acl
acl-number ]
peer peer-address
sa-policy { import |
export } [ acl acl-number ]
Use the command...
Use the command...
6-15
Chapter 6 MSDP Configuration
Remarks
Optional
SA request messages are
not filtered by default
Remarks
—
—
Required
No restrictions on (S, G)
entries by default
Required
No filtering rule by default