Dell PowerConnect M6348 Cli Reference Manual page 560

The disadvantage of enabling dynamic renew is that once an ARP cache entry is created, that
cache entry continues to take space in the ARP cache as long as the neighbor continues to
respond to ARP requests, even if no traffic is being forwarded to the neighbor. In a network
where the number of potential neighbors is greater than the ARP cache capacity, enabling
dynamic renew could prevent some neighbors from communicating because the ARP cache is
full.
Example
console#configure
console(config)#arp dynamicrenew
console(config)#no arp dynamicrenew
arp purge
Use the arp purge command in Privileged EXEC mode to cause the specified IP address to be
removed from the ARP cache. Only entries of type dynamic or gateway are affected by this
command.
Syntax
ip-address
arp purge
ip-address — The IP address to be removed from ARP cache.
•
Default Configuration
This command has no default configuration.
Command Mode
Privileged EXEC mode
User Guidelines
This command has no user guidelines.
Example
The following example removes the specified IP address from arp cache.
console#arp purge 192.168.1.10
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