Configuring Sa Message Cache; Displaying And Maintaining Msdp - 3Com MSR 50 Series Configuration Manual

1144 C 70: MSDP C
HAPTER
Configuring SA Message
Cache
Displaying and
Maintaining MSDP
ONFIGURATION
To do...
Configure the minimum TTL
value of multicast packets to
be encapsulated in SA
messages
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:
To do...
Enter system view
Enter public instance MSDP
view or VPN instance MSDP
view
Enable the SA message cache
mechanism
Configure the maximum
number of SA messages the
router can cache
To do...
View the brief information
of MSDP peers
View the detailed
information about the
status of MSDP peers
View the (S, G) entry
information in the MSDP
cache
View the number of SA
messages in the MSDP
cache
Use the command...
peer peer-address
minimum-ttl ttl-value
Use the command...
system-view
msdp [ vpn-instance
vpn-instance-name ]
cache-sa-enable
peer peer-address
sa-cache-maximum sa-limit
Use the command...
display msdp [ vpn-instance
vpn-instance-name | all-instance ] brief
[ state { connect | down | listen | shutdown
| up } ]
display msdp [ vpn-instance
vpn-instance-name | all-instance ]
peer-status [ peer-address ]
display msdp [ vpn-instance
vpn-instance-name | all-instance ] sa-cache
[ group-address | source-address | as-number ]
*
display msdp [ vpn-instance
vpn-instance-name | all-instance ] sa-count
[ as-number ]
Remarks
Optional
0 by default
Remarks
-
-
Optional
Enabled by default
Optional
8192 by default
Remarks
Available in any
view
Available in any
view
Available in any
view
Available in any
view