Edge-Core Direk Tronik 24/48-Port Management Manual page 80

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Setting an IP Address
- Configuring a value of 0 disables duplicate address detection.
- Duplicate address detection determines if a new unicast IPv6 address already
exists on the network before it is assigned to an interface.
- Duplicate address detection is stopped on any interface that has been
suspended (see "Creating VLANs" on page 23-6). While an interface is
suspended, all unicast IPv6 addresses assigned to that interface are placed in a
"pending" state. Duplicate address detection is automatically restarted when the
interface is administratively re-activated.
- 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.
- 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.
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