Show ARP Table Information
Show ARP information to view the configuration information in the ARP table.
About this task
When you use the interface parameter with the show ip arp command,you can display ARP configuration information only for a specific switch.
The show ip arp command displays all configured and dynamically learned ARP entries in the ARP table.
Procedure
Example
Switch:1#show ip arp ========================================================================================= IP Arp - GlobalRouter ========================================================================================= IP_ADDRESS MAC_ADDRESS VLAN PORT TYPE TTL(10 Sec) TUNNEL ----------------------------------------------------------------------------------------- 192.0.2.1 00:09:0f:09:00:08 20 1/3 DYNAMIC 2159 192.0.2.12 b4:a9:5a:ff:f8:40 20 1/3 DYNAMIC 458 192.0.2.25 e4:5d:52:3c:65:00 20 - LOCAL 2160 192.0.2.154 d4:ea:0e:c2:08:00 20 1/3 DYNAMIC 2131 192.0.2.157 00:1c:17:b1:ec:80 20 1/3 DYNAMIC 2131 192.0.2.161 fc:a8:41:fb:40:00 20 1/3 DYNAMIC 2131 192.0.2.253 e0:db:55:d4:e5:7c 20 1/3 DYNAMIC 2041 192.0.2.255 ff:ff:ff:ff:ff:ff 20 - LOCAL 2160 =========================================================================================== IP Arp Extn - GlobalRouter =========================================================================================== MULTICAST-MAC-FLOODING AGING(Minutes) ARP-THRESHOLD ------------------------------------------------------------------------------------------- disable 360 500 c: customer vid u: untagged-traffic 8 out of 8 ARP entries displayed ARPs on TX-NNI: Current = 0, re-ARP count = 0
Variable definitions
Use the data in the following table to help you use the show ip arp command.
Variable |
Value |
---|---|
-s |
Specifies the subnet for the table. |
gigabitEthernet |
Displays the entries for a particular brouter port. |
interface |
Displays ARP interface configuration information. Use the following parameters to display ARP table information specifically
for:
|
nlb |
Displays the Network Load Balancing (NLB) ARP entries on the switch. |
spbm-tunnel-as-mac |
Displays the remote host name in the TUNNEL column for the SPBM ARP entry. |
vlan |
Specifies the VLAN ID in the range of 1 to 4059. By default, VLAN IDs 1 to 4059 are configurable and the system reserves VLAN IDs 4060 to 4094 for internal use. On switches that support the vrf-scaling and spbm-config-mode boot configuration flags, if you enable these flags, the system also reserves VLAN IDs 3500 to 3998. VLAN ID 1 is the default VLAN and you cannot create or delete VLAN ID 1. Use these parameters to display ARP table information specifically
for:
|
vrf WORD <1-16> |
Specifies the name of the VRF. The total number of ARPs listed in the summary line of the "show ip arp" display represents the total number of ARPs on the chassis including all VRFs. |
vrfids WORD <0-512> |
Specifies the VRF ID. The total number of ARPs listed in the summary line of the "show ip arp" display represents the total number of ARPs on the chassis including all VRFs. |
<A.B.C.D> |
Specifies the network IP address for the table. |
Use the data in the following table to help you understand the output of the show ip arp command.
Parameter |
Description |
---|---|
IP_ADDRESS |
Indicates the IP address where ARP is configured. |
MAC_ADDRESS |
Indicates the MAC address where ARP is configured. |
VLAN |
Indicates the VLAN address where ARP is configured. |
PORT |
Indicates the port where ARP is configured. |
TYPE |
Indicates the type of learning (dynamic or local) where ARP is configured. |
TTL<10 secs> |
Indicates the time to live as tenths of a second where ARP is configured. |
TUNNEL |
Displays the remote host name in the TUNNEL column for the SPBM ARP entry. |
MULTICAST-MAC-FLOODING |
Displays whether IP ARP multicast MAC flooding is enabled or disabled. When enabled, the ARP entries for multicast MAC addresses are associated with the VLAN or port interface on which they were learned. |
AGING (Minutes) |
Displays when the ARP aging timer expires. |
ARP-THRESHOLD |
Displays the maximum number of outstanding ARP requests that a device can generate. |