S
ETTING
THE
S
WITCH
’
S
IP A
DDRESS
(IP V
ERSION
6)
4-25
- An interface that is re-activated restarts duplicate address detection
for all unicast IPv6 addresses on the interface. While duplicate address
detection is performed on the interface’s link-local address, the other
IPv6 addresses remain in a “tentative” state. If no duplicate link-local
address is found, duplicate address detection is started for the
remaining IPv6 addresses.
- If a duplicate address is detected, it is set to “duplicate” state, and a
warning message is sent to the console. If a duplicate link-local
address is detected, IPv6 processes are disabled on the interface. If a
duplicate global unicast address is detected, it is not used. All
configuration commands associated with a duplicate address remain
configured while the address is in “duplicate” state.
- If the link-local address for an interface is changed, duplicate address
detection is performed on the new link-local address, but not for any
of the IPv6 global unicast addresses already associated with the
interface.
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.
To Next Page
Loading...
Need help?
General
