Operation Manual
Vigor1000 Series User’s Guide 
223
Item Description 
It is not used by recent kernels, but may be needed by 
routing daemons. 
Expires 
Display the lifetime of the route. 
MTU 
Display the largest size (in bytes) of a packet. 
Advmss 
Display the largest size (in bytes) of an unfragmented piece 
of a routing advertisement. 
Hoplimit 
Display the number of network segments on which the 
packet is allowed to travel before discarded. 
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4
4
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1
1
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3
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5
5
I
I
P
P
v
v
6
6
N
N
e
e
i
i
g
g
h
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b
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IPv6 uses neighbor discovery protocol to find out neighbors on the same link. 
Each item is explained as follows: 
Item Description 
Device 
The interface name of the link where the neighbor is on. 
IP Address 
The IPv6 address of the neighbor. 
MAC Address 
The link-layer address of the neighbor. 
State 
Possible states include: 
incomplete - address resolution is in progress. 
reachable - neighbor is reachable. 
stale – neighbor(s) may be unreachable but not verified 
until a packet is sent). 
delay - neighbor may be unreachable and a packet was sent.
probe - neighbor may be unreachable and probes are sent to 
verify the reachability. 
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