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SN The link state sequence number, used to remove previous duplicate
LSAs.
Age The number of seconds since this LSA was originated.
Displaying the Neighbor Table
Each router exchanges link state information with all neighbors physically attached to
the same network segment. This table displays a summary of the link state for all
adjacent neighbors. (Note that neighboring routers are discovered by this device via
Hello messages.)
Parameter Description
IP Address IP address of the neighboring router.
ID The index number of the router interface to which this neighbor is
attached. For IP protocol, this value will always be zero.
Router ID The OSPS identifier for the neighboring router.
Option The optional OSPF capabilities supported by the neighbor. The
neighbor's optional OSPF capabilities are also listed in its Hello
packets. This enables received Hellos to be rejected (i.e., neighbor
relationships will not even start to form) if there is a mismatch in
certain crucial OSPF capabilities. The OSPF optional capabilities
currently accepted include external routing capability and TOS
capability.
You need to map the binary bits to the supported options. For
example, “3” indicates both routing capability and TOS capability.
Priority The neighbor’s router priority. This priority is used in electing the
designated router for the area in which it exists. This value will be set
to zero if this router cannot be elected.