Configuring Sa Message Policies - HP FlexFabric 5950 series Configuration Manual

Step
1. Enter system view.
2. Enter MSDP view.
3. Enable the device to send
SA request messages to
an MSDP peer.
4. Configure an SA request
policy for an MSDP peer.

Configuring SA message policies

To control the propagation of multicast source information, you can configure the following policies:
•
SA creation policy—Limits the multicast source information advertised in SA messages. This
policy enables the router to advertise (S, G) entries based on the used ACL that specifies the
multicast sources and groups.
•
SA incoming or outgoing policy—Limits the receipt or forwarding of SA messages. This
policy enables the router to receive or forward SA messages based on the used ACL that
specifies the multicast sources and groups.
By default, multicast data packets are encapsulated in SA messages and forwarded to MSDP peers
only if the TTL values in the packets are larger than zero. You can set the lower TTL threshold for
multicast data packets encapsulated in SA messages that are sent to an MSDP peer. Then, only
multicast data packets whose TTL values are larger than or equal to the configured value are
encapsulated in SA messages. Only SA messages whose TTL values are larger than or equal to the
configured value are forwarded to the specified MSDP peer. This controls the multicast data packet
encapsulation and limits the propagation range of the SA messages.
To configure SA message policies:
Step
1. Enter system view.
2. Enter MSDP view.
3. Configure an SA creation
policy.
4. Configure an SA
incoming or outgoing
policy.
5. Set the lower TTL
threshold for multicast
data packets
encapsulated in SA
messages.
Command
system-view
msdp [ vpn-instance vpn-instance-name ]
peer peer-address request-sa-enable
peer peer-address sa-request-policy
[ acl ipv4-acl-number ]
Command
system-view
msdp [ vpn-instance vpn-instance-name ]
import-source [ acl ipv4-acl-number ]
peer peer-address sa-policy { export
| import } [ acl ipv4-acl-number ]
peer peer-address minimum-ttl ttl-value
182
Remarks
N/A
N/A
By default, after receiving a
new join message, a device
does not send an SA
request message to any
MSDP peer. Instead, it
waits for the next SA
message from its MSDP
peer.
By default, no SA request
policy exists, and all SA
request from an MSDP peer
are permitted.
Remarks
N/A
N/A
By default, no SA creation
policies exist.
By default, no SA incoming
or outgoing policy exists.
The default setting is 0.