ZyXEL Communications MSC1000G User Manual page 477

Figure 317 IPv6 Neighbor Cache
The following table describes the labels in this screen.
Table 234 IPv6 Neighbor Cache
LABEL
In-band/Out-of-
band
Index
Neighbor
MAC
State
Flags
Expire
Management Switch Card User's Guide
DESCRIPTION
This is the MSC's interface on which the IPv6 address is created or through which a
neighbor can be reached.
This is the index number of the entry.
This is the IPv6 address of a neighbor or the MSC's interface.
This is the MAC address of the interface on which the IPv6 address is configured.
This field displays whether the neighboring IPv6 interface is reachable. In IPv6, "reachable"
means an IPv6 packet can be correctly forwarded to a neighboring node (host or router)
and the neighbor can successfully receive and handle the packet. The available options in
this field are:
Reachable: The interface of the neighboring device is reachable. (The MSC has received a
response to its neighbor solicitation.)
Stale: The last reachable time has expired or the MSC received an unrequested
advertisement that updates the cached link-layer address from the neighboring interface.
Delay: A packet is being sent to the neighboring interface in Stale state. The MSC delays
sending request packets for a short time to give upper-layer protocols a chance to
determine reachability. If no reachability confirmation is received within the delay timer, the
MSC sends a neighbor solicitation and changes the state to Probe.
Probe: The MSC is sending neighbor solicitations and waiting for the neighbor's response.
Invalid: The neighbor address is an invalid IPv6 address.
Unknown: The status of the neighboring interface can not be determined.
Incomplete: Address resolution is in progress and the link-layer address of the neighbor
has not yet been determined (see RFC 4861). The interface of the neighboring device did
not give a complete response.
This displays R when the neighboring device is a router. Otherwise, this field is blank to
indicate the neighboring device is a host.
This displays how long (hhhmmmsss) an address can be used before it expires. When an
address is manually configured, it displays permanent (never expires).
Chapter 12 Statistics Screens
477