Information Commands
48
ARP information
The Address Resolution Protocol (ARP) information includes IP address and MAC address of each entry,
address status flags, VLAN, and port for the address, and port referencing information.
The following table describes the Address Resolution Protocol commands.
Table 31 ARP information
Command Usage
show ip arp find <IP address>
Displays a single ARP entry by IP address.
Command mode: All except User EXEC
show ip arp interface port <port
number>
Displays the ARP entries on a single port.
Command mode: All except User EXEC
show ip arp vlan <1-4095>
Displays the ARP entries on a single VLAN.
Command mode: All except User EXEC
show ip arp
Displays all ARP entries, including:
• IP address and MAC address of each entry
• Address status flag
• The VLAN and port to which the address belongs
• The ports which have referenced the address (empty if no
port has routed traffic to the IP address shown)
Command mode: All except User EXEC
show ip arp reply
Displays the ARP address list: IP address, IP mask, MAC address,
and VLAN flags.
Command mode: All except User EXEC
Show all ARP entry information
The following command displays ARP information:
show ip arp
Command mode: All except User EXEC
IP address Flags MAC address VLAN Port
--------------- ----- ----------------- ---- ----
192.168.2.4 00:50:8b:b2:32:cb 1 18
192.168.2.19 00:0e:7f:25:89:b5 1 17
192.168.2.61 P 00:0f:6a:ed:46:00 1
The Flag field provides additional information about an entry. If no flag displays, the entry is normal.
Table 32 ARP dump flag parameters
Flag Description
P
Permanent entry created for switch IP interface.
R
Indirect route entry.
U
Unresolved ARP entry. The MAC address has not been learned.
