Cisco ASR 9000 Series Command Reference Manual page 340

show ipv6 neighbors (BNG)
Field
Cisco ASR 9000 Series Aggregation Services Router Broadband Network Gateway Command Reference,
Release 5.2.x
326
Description
The state of the neighbor cache entry. These are the
states for dynamic entries in the IPv6 neighbor
discovery cache:
• INCMP (incomplete)—Address resolution is
being performed on the entry. A neighbor
solicitation message has been sent to the
solicited-node multicast address of the target,
but the corresponding neighbor advertisement
message has not yet been received.
• reach (reachable)—Positive confirmation was
received within the last ReachableTime
milliseconds that the forward path to the
neighbor was functioning properly. While in
reach state, the device takes no special action
as packets are sent.
• stale—More than ReachableTime milliseconds
have elapsed since the last positive confirmation
was received that the forward path was
functioning properly. While in stale state, the
device takes no action until a packet is sent.
• delay—More than ReachableTime milliseconds
have elapsed since the last positive confirmation
was received that the forward path was
functioning properly. A packet was sent within
the last DELAY_FIRST_PROBE_TIME
seconds. If no reachability confirmation is
received within
DELAY_FIRST_PROBE_TIME seconds of
entering the delay state, send a neighbor
solicitation message and change the state to
probe.
• probe—A reachability confirmation is actively
sought by resending neighbor solicitation
messages every RetransTimer milliseconds until
a reachability confirmation is received.
These are the possible states for static entries in the
IPv6 neighbor discovery cache:
• reach (reachable)—The interface for this entry
is up.
• INCMP (incomplete)—The interface for this
entry is down.
Note Reachability detection is not applied to static
entries in the IPv6 neighbor discovery cache;
IPv4 and IPv6 Commands