Cisco catalyst 3750 Command Reference Manual page 241

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Catalyst 3750 Switch Cisco IOS Commands

The rate limit is calculated separately on each switch in a switch stack. For a cross-stack EtherChannel,

this means that the actual rate limit might be higher than the configured value. For example, if you set

the rate limit to 30 pps on an EtherChannel that has one port on switch 1 and one port on switch 2, each

port can receive packets at 29 pps without causing the EtherChannel to become error-disabled.

The rate of incoming ARP packets on EtherChannel ports equals the sum of the incoming rate of ARP

packets from all the channel members. Configure the rate limit for EtherChannel ports only after

examining the rate of incoming ARP packets on all the channel members.

This example shows how to limit the rate of incoming ARP requests on a port to 25 pps and to set the

interface monitoring interval to 5 consecutive seconds:

Switch(config)# interface gigabitethernet1/0/1

Switch(config-if)# ip arp inspection limit rate 25 burst interval 5

You can verify your settings by entering the show ip arp inspection interfaces interface-id privileged

EXEC command.

Related Commands

show inventory

Displays the trust state and the rate limit of ARP packets for the specified

interface or all interfaces.

ip arp inspection limit

Catalyst 3750 Switch Command Reference

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