Cisco Systems OL-4580-01 manual Field Description

Chapter 3 Configuring Open Shortest Path First (OSPF)

Showing OSPF Information

Table 3-5 Field Descriptions for show ospf interfaces Command (continued)

Field	Description
Priority	The priority assigned to the interface advertised in the hello
	packets. When two routers attached to a network both
	attempt to become the designated router, the router with the
	highest priority takes precedence. A router whose priority
	is set to 0 is ineligible to become the designated router on
	the attached network.
DR	The IP interface address of the designated router selected
	for the attached network. The designated router is selected
	on broadcast networks by the hello protocol. Two pieces of
	identification are kept for the designated router: the Router
	ID and the IP interface address on the network. The
	designated router advertises the link state for the network.
	This network LSA is labeled with the designated router’s
	IP address. The designated router is initialized to 0.0.0.0,
	which indicates the lack of a designated router.
BR	The backup designated router selected for the attached
	network. The backup designated router is also selected on
	all broadcast networks by the hello protocol. All routers on
	the attached network become adjacent to both the
	designated router and the backup designated router. The
	backup designated router becomes the designated router
	when the current designated router fails. The backup
	designated router is initialized to 0.0.0.0, indicating the
	lack of a backup designated router.
Hello	The length of time, in seconds, between the hello packets
	that the router sends on the interface. This interval is
	advertised in hello packets sent out on this interface.
Dead	The number of seconds before the router’s neighbors
	declare that the router is down, and when they stop
	receiving the router’s hello packets. This interval is
	advertised in hello packets sent out on this interface.

	Cisco Content Services Switch Routing and Bridging Configuration Guide
3-32	OL-4580-01