3Com Switch 7750 Configuration Guide Guide

450 CHAPTER 45: MSDP CONFIGURATION
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.
Displaying and
Maintaining MSDP
Configuration
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.
Tracing the transmission path of an SA message over the network
You can use the msdp-tracert command in any view to trace the path along
which the multicast data travels from the multicast source to the destination
receiver over the network, so as to locate errors, if any.
Tabl e 357 Configure SA message cache
Operation Command Description
Enter system view system-view -
Enter MSDP view msdp -
Enable SA message caching
mechanism
cache-sa-enable
Optional
By default, the SA message
caching mechanism is
enabled.
Configure the maximum
number of SA messages
cached
peer peer-address
sa-cache-maximum sa-limit
Optional
By default, the maximum
number of SA messages
cached on a router is 2,048.
Tabl e 358 Display and debug MSDP configuration
Operation Command
Display the brief information of MSDP peer
state
display msdp brief
Display the detailed information of MSDP peer
status
display msdp peer-status [ peer-address ]
Display the (S, G) state learned from MSDP
peers
display msdp sa-cache [ group-address | [
source-address ] ]
[autonomous-system-number ]
Display the number of sources and groups in
the MSDP cache
display msdp sa-count
[autonomous-system-number ]
Reset the TCP connection with the specified
MSDP peer
reset msdp peer peer-address
Clear the cached SA messages reset msdp sa-cache [ group-address ]
Clear the statistics information of the specified
MSDP peer without resetting the MSDP peer
reset msdp statistics [ peer-address ]