4.6.6.5.3 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 OSPF 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.

WGS3 Layer 3 Switch User’s Manual

- 126 -