IPv6 Address Linklayer Addr Interface
2001::1 00d0.f800.0001 vlan 1
State: Reach/H Age: - asked: 0
fe80::200:ff:fe00:1 00d0.f800.0001 vlan 1
State: Reach/H Age: - asked: 0
State of the neighbor: state/H(R)
The values of STATE are as below:
INCMP (Incomplete): The address resolution of the neighbor is underway, the NS is
sent, but the NA is not received.
REACH (Reachable): The switch is connected with the neighbor. In this state, the
switch takes no additional action when sending packets to the neighbor.
STALE: The reachable time of the neighbor expires. In this state, the switch takes no
additional action; it only starts NUD (Neighbor Unreachability Detection) after a
packet is sent to the neighbor.
DELAY: A packet is sent to the neighbor in STALE state. If the STALE state changes
to DELAY, DELAY will be changed to PROBE if no neighbor reachability notification
is received within DELAY_FIRST_PROBE_TIME seconds (5s), the NS will be sent to
the neighbor to start NUD.
PROBE: The NUD is started to check the reachability of the neighbor. The NS
packets are sent to the neighbor at the interval of RetransTimer milliseconds until the
response from the neighbor is received or the number of the sent NSs hits
MAX_UNICAST_SOLICIT(3).
?: Unknown state.
/R—indicate the neighbor is considered as a device
/H: The neighbor is a host.
The reachable time of the neighbor. ’-‘ indicates that the neighbor is always
reachable. Note that the reachability of a static neighbor depends on the actual
situation. ’expired’ indicates that the lifetime of the neighbor expires, and the
neighbor is waits for the triggering of NUD.