Neighbor Discovery Cache - Avaya ERS 8800 series Configuration Manual

IPv4 neighbor function IPv6 neighbor function
Router advertisement
message (optional)
Redirect message

Neighbor discovery cache

The neighbor discovery cache lists information about neighbors in your network.
The neighbor discovery cache can contain the following types of neighbors:
• static: a configured neighbor
• local: a device on the local system
• dynamic: a discovered neighbor
Table 3: Neighbor cache states
Table 3: Neighbor cache states
State
Incomplete
Reachable
Stale
Delay
Configuration — IPv6 Routing
Router advertisement
(required)
Redirect message
on page 25 describes neighbor cache states.
A node sends a neighbor solicitation message to a multicast
device. The multicast device sends no neighbor advertisement
message in response.
You receive positive confirmation within the last reachable time
period.
A node receives no positive confirmation from the neighbor in
the last reachable time period.
A time period longer than the reachable time period passes
since the node received the last positive confirmation, and a
packet was sent within the last DELAY_FIRST_PROBE_TIME
period. If no reachability confirmation is received within
Description
message requests that routers
generate router advertisement
immediately rather than at the
scheduled time.
Routers send this message to
advertise their presence with various
links and Internet parameters either
periodically or in response to a router
solicitation message. Router
advertisements contain prefixes that
you use for on-link determination or
address configuration, and a
suggested hop limit value.
Routers send this message to inform
hosts of a better first hop for a
destination.
Description
Neighbor discovery
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