show arp state

Description

Shows ARP (Address Resolution Protocol) cache entries that are in the specified state.

Command context

Operator (>) or Manager (#)

Parameters

all

Shows the ARP cache entries for all VRF (Virtual Router Forwarding) instances.

failed

Shows the ARP cache entries that are in failed state. The neighbor might have been deleted.

incomplete

Shows the ARP cache entries that are in incomplete state.

An incomplete state means that address resolution is in progress and the link-layer address of the neighbor has not yet been determined. A solicitation request was sent, and the switch is waiting for a solicitation reply or a timeout.

permanent

Shows the ARP cache entries that are in permanent state. ARP entries that are in a permanent state can be removed by administrative action only.

reachable

Shows the ARP cache entries that are in reachable state, meaning that the neighbor is known to have been reachable recently.

stale

Shows ARP cache entries that are in stale state.

ARP cache entries are in the stale state if the elapsed time is in excess of the ARP timeout in seconds since the last positive confirmation that the forwarding path was functioning properly.

[vsx-peer]

Shows the output from the VSX peer switch. If the switches do not have the VSX configuration or the ISL is down, the output from the VSX peer switch is not displayed.

Authority

Operators or Administrators. Users without administrator authority can execute this command from the operator context (>) only.

Examples

switch# show arp state failed

IPv4 Address     MAC                Port         Physical Port    State
---------------------------------------------------------------------------
192.168.1.4                         vlan10                         failed