Displaying And Debugging Msdp Configuration - 3Com 7757 Configuration Manual

Configuring SA Message
Cache
Displaying and
Debugging MSDP
Configuration
Table 391 Configure a rule for filtering received and forwarded SA messages
Operation
Configure to filter SA
messages to be received
or forwarded
Configure the minimum
TTL for the multicast
packets sent to the
specified MSDP peer
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.
You can configure the number of SA entries cached in each MSDP peer on the
router by executing the following command, but the number must be within the
system limit. The maximum number of cached SA messages on each MSDP peer
and on all the MSDP peers on a router is limited by the system. To protect a router
against Deny of Service (DoS) attacks, you can manually configure the maximum
number of SA messages cached on the router. Generally, the configured number
of SA messages cached should be less than the system limit.
Table 392 Configure SA message cache
Operation
Enter system view
Enter MSDP view
Enable SA message
caching mechanism
Configure the maximum
number of SA messages
cached

Displaying and debugging MSDP configuration

After the above-mentioned configuration, you can use the display command in
any view to display the MSDP running information, so as to verify configuration.
In user view, you can execute the reset command to reset the MSDP counter.
Table 393 Display and debug MSDP configuration
Operation
Display the brief information of MSDP peer state
Display the detailed information of MSDP peer
status
Displaying and Debugging MSDP Configuration
Command
peer peer-address
sa-policy { import | export }
[ acl acl-number ]
peer peer-address
minimum-ttl ttl-value
Command
system-view
msdp
cache-sa-enable
peer peer-address
sa-cache-maximum sa-limit
Command
display msdp brief
display msdp peer-status
[ peer-address ]
Description
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.
Optional
By default, the value of TTL
threshold is 0.
Description
-
-
Optional
By default, the SA message
caching mechanism is enabled.
Optional
By default, the maximum
number of SA messages cached
on a router is 2,048.
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