The peer sa-cache-maximum command limits the maximum number of (S, G) entries that are learnt from MSDP peers and cached by the SA cache.
The undo peer sa-cache-maximum command restores the maximum number of (S, G) entries that are learnt from MSDP peers and cached by the SA cache to the default configuration.
By default, the maximum number of (S, G) entries in the SA cache is 8192.
| Parameter | Description | Value |
|---|---|---|
peer-address |
Specifies the address of an MSDP peer. |
The address is in dotted decimal notation. |
sa-limit |
Specifies the maximum number of (S, G) entries that are allowed to cache. |
The number is an integer that ranges from 1 to 4294967295. |
Usage Scenario
You are recommended to perform this configuration on all MSDP peers on the network vulnerable to DoS attacks.
Prerequisites
MSDP peers have been configured using the peer connect-interface (MSDP) command.
Configuration Impact
The total number of (S, G) entries that can be stored in SA-Cache is limited by the specification of the SA-Cache. At present, for an entire switch, the maximum number of (S, G) entries in SA-Cache is 8192.
For the (S, G) entries of a single peer:
If the number of (S, G) entries is not set or exceeds 8192, the maximum number of (S, G) entries in the SA cache can be set to 8192.
If the number of (S, G) entries is smaller than 8192, the maximum number of (S, G) entries in the SA cache is the configured value. The redundant (S, G) entries are not cached or advertised to PIM-SM but can be forwarded through SA messages.
# Set the maximum number of (S, G) entries that are learnt from MSDP peers and cached by the SA cache to 100 when the switch receives an SA message from MSDP peer 10.10.7.6.
<HUAWEI> system-view [HUAWEI] multicast routing-enable [HUAWEI] msdp [HUAWEI-msdp] peer 10.10.7.6 connect-interface vlanif 100 [HUAWEI-msdp] cache-sa-enable [HUAWEI-msdp] peer 10.10.7.6 sa-cache-maximum 100