Configuring A Rule For Filtering The Multicast Sources Of Sa Messages; Configuring A Rule For Filtering Received And Forwarded Sa Messages - 3Com 5500-EI PWR Install Manual

To do...
Configure a rule for filtering the
SA messages received by an
MSDP peer

Configuring a Rule for Filtering the Multicast Sources of SA Messages

An RP filters each registered source to control the information of active sources advertised in the SA
message. An MSDP peer can be configured to advertise only the (S, G) entries in the multicast routing
table that satisfy the filtering rule when the MSDP creates the SA message; that is, to control the (S, G)
entries to be imported from the multicast routing table to the PIM-SM domain. If the import-source
command is executed without the acl keyword, no source will be advertised in the SA message.
Follow these steps to configure a rule for filtering multicast sources using SA messages:
To do...
Enter system view
Enter MSDP view
Configure to filter multicast
sources using SA messages

Configuring a Rule for Filtering Received and Forwarded SA Messages

Besides the creation of source information, controlling multicast source information allows you to
control the forwarding and reception of source information. You can control the reception of SA
messages using the MSDP inbound filter (corresponding to the import keyword); you can control the
forwarding of SA messages by using either the MSDP outbound filter (corresponding to the export
argument) or the TTL threshold. MSDP inbound/outbound filter implements the following functions:
Filtering out all (S, G) entries
Receiving/forwarding only the SA messages permitted by advanced ACL rules (You can configure
ACL rules for filtering source IP addresses and group IP addresses.)
An SA message carrying encapsulated data can reach the specified MSDP peer outside the domain
only if the TTL in its IP header is greater than the threshold; therefore, you can control the forwarding
range of SA messages that carry encapsulated data by configuring the TTL threshold.
Follow these steps to configure a rule for filtering received and forwarded SA messages:
To do...
Enter system view
Enter MSDP view
Use the command...
peer peer-address
sa-request-policy [ acl
acl-number ]
Use the command...
system-view
msdp
import-source [ acl
acl-number ]
Use the command...
system-view
msdp
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Remarks
Optional
By default, a router receives all SA
request messages from the MSDP
peer.
Remarks
—
—
Optional
By default, all the (S, G) entries
in the domain are advertised in
the SA message.
Remarks
—
—