show ipv6 neighbors state


show ipv6 neighbors state {all | failed | incomplete | permanent | reachable | stale} [vsx-peer]


Shows all IPv6 neighbor ARP (Address Resolution Protocol) cache entries, or those cache entries that are in the specified state.

Command context

Operator (>) or Manager (#)



Shows all ARP cache entries.


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


Shows 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. This means that a solicitation request was sent, and you are waiting for a solicitation reply or a timeout.


Shows ARP cache entries that are in permanent state.


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


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.


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. This parameter is available on switches that support VSX.


Operators or Administrators or local user group members with execution rights for this command. Operators can execute this command from the operator context (>) only.


switch# show ipv6 neighbors state all

IPv6 Address                  MAC                Port     Physical Port    State
100::2                        48:0f:cf:af:f1:cc  lag1     lag1             reachable
300::3                        48:0f:cf:af:33:be  vlan3    1/4/20           reachable
fe80::4a0f:cfff:feaf:f1cc     48:0f:cf:af:f1:cc  lag1     lag1             reachable
200::3                        48:0f:cf:af:33:be  1/4/11   1/4/11           reachable
fe80::4a0f:cfff:feaf:33be     48:0f:cf:af:33:be  vlan3    1/4/20           reachable

Total Number Of IPv6 Neighbors Entries Listed- 5.