Concept Guide

arp inspection
Examples of Viewing the ARP Information
To view entries in the ARP database, use the show arp inspection database command.
DellEMC#show arp inspection database
Protocol Address Age(min) Hardware Address Interface VLAN CPU
---------------------------------------------------------------------
Internet 10.1.1.251 - 00:00:4d:57:f2:50 Gi 1/2 Vl 10 CP
Internet 10.1.1.252 - 00:00:4d:57:e6:f6 Gi 1/1 Vl 10 CP
Internet 10.1.1.253 - 00:00:4d:57:f8:e8 Gi 1/3 Vl 10 CP
Internet 10.1.1.254 - 00:00:4d:69:e8:f2 Gi 1/5 Vl 10 CP
DellEMC#
To see how many valid and invalid ARP packets have been processed, use the show arp inspection statistics command.
DellEMC#show arp inspection statistics
Dynamic ARP Inspection (DAI) Statistics
---------------------------------------
Valid ARP Requests : 0
Valid ARP Replies : 1000
Invalid ARP Requests : 1000
Invalid ARP Replies : 0
DellEMC#
Conguring dynamic ARP inspection-limit
To congure dynamic ARP inspection rate limit on a port, perform the following task.
1 Enter into global conguration mode.
EXEC Privilege mode
configure terminal
2 Select the interface to be congured.
CONFIGURATION mode
interface interface-name
3 Congure ARP packet inspection rate limiting.
INTERFACE CONFIGURATION mode
arp inspection-limit {rate pps [interval seconds]}
The rate packet per second (pps) range is from 1 to 2048. The default is 15.
The rate burst interval range is from 1 to 15 seconds. The default is 1.
Examples of viewing the ARP inspection-limit information
DellEMC# show running-config interface gigabitethernet 1/1
interface GigabitEthernet 1/1
no ip address
switchport
arp inspection-limit rate 15 interval 1
no shutdown
DellEMC#
284
Dynamic Host Conguration Protocol (DHCP)