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3Com Switch 8800 Configuration Guide Chapter 30 MSDP Configuration
30-7
30.2.6 Configuring the Maximum Number of SA caching
To prevent DoS (Deny of Service) attacks, you can set the maximum number of SAs
cached on the router.
Perform the following configuration in MSDP view.
Table 30-6 Configuring the maximum number of SA caching
Operation Command
Configuring the maximum number of SA
caching
peer peer-address sa-cache-maximum
sa-limit
Restore the default configuration
undo peer peer-address
sa-cache-maximum
By default, the maximum number of SA caching is 2048.
30.2.7 Requesting Source Information of MSDP Peers
When a new group joins, the router will send a SA request message to the specified
MSDP peer, and the MSDP peer will respond with the SA messages it caches. If the
MSDP peer does not enable the SA caching, the configuration is invalid.
Please perform the following configurations in MSDP view.
Table 30-7 Requesting source information of MSDP peers
Operation Command
Configure the router to send SA request message to
the specified MSDP peer when receiving the join
message of a group
peer peer-address
request-sa-enable
Restore the default configuration
undo peer peer-address
request-sa-enable
The SA request message sent by a local RP will get the immediate response about all
active sources.
By default, the router does not send SA request message to its MSDP peer when
receiving the join message of a group. Instead, it waits for the arrival of SA message of
the next period.
30.2.8 Controlling the Source Information Created
I. Filtering the multicast routing entries imported
RP filters the registered sources to control the information of the active sources
advertised in SA message. MSDP peers can be configured to only advertise the