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- When a non-default value is configured, the specified interval is used both for
router advertisements and by the router itself.
Current Neighbor Cache Table
• IPv6 Address – IPv6 address of neighbor device.
• Age – The time since the address was verified as reachable (in minutes). A static
entry is indicated by the value “Permanent.”
• Link-layer Address – Physical layer MAC address.
• State – The current state for an entry.
The following states are used for dynamic entries:
- INCMP (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.
- REACH (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.
- 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.
- 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.
- PROBE - A reachability confirmation is actively sought by resending neighbor
solicitation messages every RetransTimer interval until confirmation of
reachability is received.
- ???? - Unknown state.
The following states are used for static entries:
- INCMP (Incomplete) -The interface for this entry is down.
- REACH (Reachable) - The interface for this entry is up. Reachability detection
is not applied to static entries in the IPv6 neighbor discovery cache.
• VLAN – VLAN interface from which the address was reached.
Adding Static Neighbors (IPv6 Neighbor -- Add)
• IPv6 Address – The IPv6 address of a neighbor device that can be reached
through one of the network interfaces configured on this switch. You can specify
either a link-local or global unicast address formatted according to RFC 2373 “IPv6
Addressing Architecture,” 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.
• VLAN – VLAN ID (Range: 1-4093)
•
Hardware Address
– The 48-bit MAC layer address for the neighbor device. This
address must be formatted as six hexadecimal pairs separated by hyphens.
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Basic Management Tasks
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