Monitoring ARP Details

Purpose

Display information about ARP.

Action

To display information about ARP:

host1#show arp
        Address    Age   Hardware Addr  Interface
 172.31.192.217   21340  00d0.58f2.67e0 loopback1
    192.168.1.0   20730  00e0.09ed.5312 fastEthernet6/0 *
    192.168.1.1   12550  00e0.b06a.4c75 fastEthernet6/0 *
  192.168.1.217   21600  0090.1a00.0230 fastEthernet6/0 *
  192.168.1.255   21600  00f0.c2d1.1200 fastEthernet6/0 *
      12.40.0.2   24320  0020.6393.4233 atm5/0.1
     172.18.2.1   21600  0020.bed2.8738 atm5/1.1
     172.18.2.2   21600  0020.5b91.60f2 atm5/1.1
 172.31.192.206   21600  00d0.43b5.1032 atm5/1.1

Meaning

Table 15 lists the show arp command output fields.

Table 15: show arp Output Fields

Field Name

Field Description

Address

IP address of the entry

Age

Time to live for this entry in seconds

Hardware Addr

Physical (MAC) address of the entry

Interface

Interface-specifier of the entry (for example, fastEthernet6/0 is an Ethernet interface on slot 6, port 0)

*—Indicates that an ARP entry was added because of an arp validate command, rather than just an arp command.

Related Documentation