user manual

Chapter 3 Configuring Open Shortest Path First (OSPF)
Showing OSPF Information
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Cisco Content Services Switch Routing and Bridging Configuration Guide
OL-4580-01
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.
Table 3-5 Field Descriptions for show ospf interfaces Command (continued)
Field Description