LevelOne GSW-2600TXM manual 166

Parameter	Description
IP Address	The IP address of this OSPF interface.
Router ID	Router ID for this router.
Designated	The IP of the designated router. The designated router advertises the
Router	link state of the OSPF Area.
Backup DR	The backup designated router. If the designated router fails, the
	backup designated router takes its place.
Status	This interface’s status in this OSPF area.
Events	The number of events since the designated router was selected.

Displaying the Link State Table

The link state table displays all advertisements in the link state database. This database contains linkage information for all the areas to which this router is attached. Note that all the routers within an area exchange information to ensure that they maintain an identical link state database. This database can therefore be used to troubleshoot network configuration problems.

Parameter	Description
Area ID	An OSPF area identifier configured for a group of OSPF routers. (For
	information on how to assign this identifier to a specific interface, see
	chapter 3 “Configuring OSPF”.)
Type	The link state advertisement type:
	RtrLSA:	Router LSA – All area routers advertise the state of links
		from the router itself to the its local area.
	NetLSA:	Network LSA – The designated router for each area
		advertises the link state for each transit area; i.e., an area
		with more than one attached router. This LSA includes
		information about each router attached to the area,
		including the designated router itself.
	SumLSA:	Summary LSA – Advertise the cost to a specific
		subnetwork outside the router’s area, or the cost to a
		specific autonomous system boundary router.
	ExtLSA:	External LSA – Advertises link state information for each
		known network outside the autonomous system.
Link State ID	The identifier for the router originating this entry, usually in the form of
	an IP address.
Router ID	The IP address of the originating router.
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