Brocade 6910 Ethernet Access Switch Configuration Guide (Supporting R2.2.0.0) - Manual (Page 683)

Brocade 6910 Ethernet Access Switch Configuration Guide 627
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IPv6 Interface
using 8 colon-separated 16-bit hexadecimal values. One double colon may be used in the
address to indicate the appropriate number of zeros required to fill the undefined fields.
Default Setting
All IPv6 neighbor discovery cache entries are displayed.
Command Mode
Privileged Exec
Example
The following shows all known IPv6 neighbors for this switch:
Console#show ipv6 neighbors
State: I1 - Incomplete, I2 - Invalid, R - Reachable, S - Stale, D - Delay,
P1 - Probe, P2 - Permanent, U - Unknown
IPv6 Address Age Link-layer Addr State VLAN
FE80::2E0:CFF:FE9C:CA10 4 00-E0-0C-9C-CA-10 R 1
Console#
TABLE 149 show ipv6 neighbors - display description
Field Description
IPv6 Address IPv6 address of neighbor
Age The time since the address was verified as reachable (in seconds).
Link-layer Addr Physical layer MAC address.
State The following states are used for dynamic entries:
I1 (Incomplete) - Address resolution is being carried out on the entry. A neighbor solicitation
message has been sent to the multicast address of the target, but it has not yet returned a
neighbor advertisement message.
I2 (Invalid) - An invalidated mapping. Setting the state to invalid dis-associates the interface
identified with this entry from the indicated mapping (RFC 4293).
R (Reachable) - Positive confirmation was received within the last ReachableTime interval that
the forward path to the neighbor was functioning. While in REACH state, the device takes no
special action when sending packets.
S (Stale) - More than the ReachableTime interval has elapsed since the last positive
confirmation was received that the forward path was functioning. While in STALE state, the
device takes no action until a packet is sent.
D (Delay) - More than the ReachableTime interval has elapsed since the last positive
confirmation was received that the forward path was functioning. A packet was sent within the
last DELAY_FIRST_PROBE_TIME interval. If no reachability confirmation is received within this
interval after entering the DELAY state, the switch will send a neighbor solicitation message
and change the state to PROBE.
P1 (Probe) - A reachability confirmation is actively sought by resending neighbor solicitation
messages every RetransTimer interval until confirmation of reachability is received.
U (Unknown) - Unknown state.
The following states are used for static entries:
I1 (Incomplete)-The interface for this entry is down.
R (Reachable) - The interface for this entry is up. Reachability detection is not applied to static
entries in the IPv6 neighbor discovery cache.
P2 (Permanent) - Indicates a static entry.
VLAN VLAN interface from which the address was reached.