Configuring Sa Message Filtering Rules - HP 6125XLG Ip Multicast Configuration Manual

Step
1. Enter system view.
2. Enter MSDP view.
3. Enable the device to send
SA request messages.
4. Configure a filtering rule
for SA request messages.

Configuring SA message filtering rules

An SA message creation rule enables the router to filter the (S, G) entries to be advertised when the router
creates an SA message. This controls the propagation of multicast source information when the router
creates SA messages.
An SA message filtering rule enables the router to filter the (S, G) forwarding entries to be advertised
when the router receives or forwards an SA message. This controls the propagation of multicast source
information when the router receives or forwards SA messages.
The lower TTL threshold for multicast data packets encapsulated in SA messages controls the multicast
data packet encapsulation and limits the propagation range of the SA messages:
Before creating an SA message with an encapsulated multicast data packet, the router examines
•
the TTL value of the multicast data packet:
If the TTL value is less than the threshold, the router does not create the SA message.
If the TTL value is greater than or equal to the threshold, the router encapsulates the multicast
data in the SA message and sends the SA message.
After receiving an SA message with an encapsulated multicast data packet, the router decreases the
•
TTL value of the multicast packet by 1 and then checks the TTL value:
If the TTL value is less than the threshold, the router does not forward the SA message to the
designated MSDP peer.
If the TTL value is greater than or equal to the threshold, the router re-encapsulates the multicast
data in an SA message and sends the SA message.
To configure a filtering rule for creating, receiving, or forwarding SA messages:
Step
1. Enter system view.
2. Enter MSDP view.
3. Configure an SA message
creation rule.
4. Configure a filtering rule for
receiving or forwarding SA
messages.
Command
system-view
msdp [ vpn-instance vpn-instance-name ]
peer peer-address request-sa-enable
peer peer-address sa-request-policy [ acl
acl-number ]
Command
system-view
msdp [ vpn-instance
vpn-instance-name ]
import-source [ acl acl-number ]
peer peer-address sa-policy
{ export | import } [ acl
acl-number ]
150
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, SA request messages
are not filtered.
Remarks
N/A
N/A
By default, no creating rule is
configured.
By default, no filtering rule is
configured.