Configuring Sa Message Cache; Displaying And Maintaining Msdp - H3C S7500E Series Operation Manual

Operation Manual – Multicast
H3C S7500E Series Ethernet Switches
Configure the minimum
TTL value of multicast
packets to be
encapsulated in SA
messages

6.5.5 Configuring SA Message Cache

To reduce the time spent in obtaining the multicast source information, you can have SA
messages cached on the router. However, the more SA messages are cached, the
larger memory space of the router is used.
With the SA cache mechanism enabled, when receiving a new Join message, the
router will not send an SA request message to its MSDP peer; instead, it acts as
follows:
If there is no SA message in the cache, the router will wait for the SA message
sent by its MSDP peer in the next cycle;
If there is an SA message in the cache, the router will obtain the information of all
active sources directly from the SA message and join the corresponding SPT.
To protect the router against denial of service (DoS) attacks, you can configure the
maximum number of SA messages the route can cache.
Follow these steps to configure the SA message cache:
Enter system view
Enter MSDP view
Enable the SA message
cache mechanism
Configure the maximum
number of SA messages
the router can cache

6.6 Displaying and Maintaining MSDP

View the brief information
of MSDP peers
To do...
peer peer-address
minimum-ttl ttl-value
To do...
system-view
msdp
cache-sa-enable
peer peer-address
sa-cache-maximum
sa-limit
To do...
display msdp brief [ state
{ connect | down | listen |
shutdown | up } ]
Use the command...
Use the command...
Use the command...
6-16
Chapter 6 MSDP Configuration
Remarks
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0 by default
Remarks
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Optional
Enabled by default
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