Caching Source-Active State - Cisco Catalyst 9500 series Configuration Manual

Caching Source-Active State

Caching Source-Active State
If you want to sacrifice some memory in exchange for reducing the latency of the source information, you
can configure the Device to cache SA messages. Perform the following steps to enable the caching of
source/group pairs:
Follow these steps to enable the caching of source/group pairs:
Procedure
Step 1
Step 2
Step 3
Step 4
Routing Configuration Guide, Cisco IOS XE Everest 16.6.x (Catalyst 9500 Switches)
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Command or Action
enable
Example:
Device> enable
configure terminal
Example:
Device# configure terminal
ip msdp cache-sa-state [list
access-list-number]
Example:
Device(config)# ip msdp
cache-sa-state 100
access-list access-list-number {deny
| permit} protocol source
source-wildcard destination
destination-wildcard
Example:
Device(config)# access-list
100 permit ip 171.69.0.0
0.0.255.255 224.2.0.0
0.0.255.255
Purpose
Enables privileged EXEC mode. Enter your password if
prompted.
Enters the global configuration mode.
Enables the caching of source/group pairs (create an SA state).
Those pairs that pass the access list are cached.
For list access-list-number, the range is 100 to 199.
An alternative to this command is the ip msdp
Note
sa-reques global configuration command, which
causes the Device to send an SA request message to
the MSDP peer when a new member for a group
becomes active.
Creates an IP extended access list, repeating the command as
many times as necessary.
• For access-list-number, the range is 100 to 199. Enter
the same number created in Step 2.
• The deny keyword denies access if the conditions are
matched. The permit keyword permits access if the
conditions are matched.
• For protocol, enter ip as the protocol name.
• For source, enter the number of the network or host
from which the packet is being sent.
Configuring MSDP