H3C S3600 Series User Manual

Operation Manual – Multicast
H3C S3600 Series Ethernet Switches-Release 1510 Chapter 8 MSDP Configuration
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8.4.4 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.
By default, an MSDP peer receives and forwards all SA messages.
MSDP inbound/outbound filter implements the following functions:
z Filtering out all (S, G) entries
z 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 when the TTL in its IP header exceeds the threshold; therefore,
you can control the forwarding of SA messages that carry encapsulated data by
configuring the TTL threshold.
Table 8-10 Configure a rule for filtering received and forwarded SA messages
Operation Command Description
Enter system view
system-view
—
Enter MSDP view
msdp
—
Configure to filter
imported and exported
SA messages
peer peer-address
sa-policy { import |
export } [ acl acl-number ]
Optional
By default, no filtering is
imposed on SA messages to
be received or forwarded,
namely all SA messages
from MSDP peers are
received or forwarded.
Configure the
minimum TTL for the
multicast packets sent
to the specified MSDP
peer
peer peer-address
minimum-ttl ttl-value
Optional
By default, the value of TTL
threshold is 0.
8.4.5 Configuring SA Message Cache
With the SA message caching mechanism enabled on the router, the group that a new
member subsequently joins can obtain all active sources directly from the SA cache
and join the corresponding SPT source tree, instead of waiting for the next SA
message.

H3C S3600 Series Specifications

General

Brand	H3C
Model	S3600 Series
Category	Switch
Language	English