-- the protocol address of the neighbour. It is either an IPv4 or IPv6 address.
-- the interface to which this neighbour is attached.
-- the link layer address of the neighbour.
LLADDRESS can also be
-- the state of the neighbour entry.
nud is an abbreviation for ``Neighbour
Unreachability Detection''. The state can take one of the following values:
permanent-- the neighbour entry is valid forever and can be only be removed administratively.
noarp-- the neighbour entry is valid. No attempts to validate this entry will be made but it can be removed when its lifetime expires.
reachable-- the neighbour entry is valid until the reachability timeout expires.
stale-- the neighbour entry is valid but suspicious. This option to
ip neighdoes not change the neighbour state if it was valid and the address is not changed by this command.