
Customizing OSPF Services
117356-A Rev. A 7-43
Setting the Dead Interval
The dead interval is the number of seconds that OSFP waits to receive a hello
packet from a neighbor before considering the neighbor to be down. The dead
interval value should be some multiple of the hello Interval value.
Each type of network has an optimum dead interval. If the interface is connected
to a broadcast network, we suggest you use the default setting -- 40 seconds. We
suggest the following settings for other network types supported by OSPF:
You can use the BCC or Site Manager to specify a dead interval.
Using the BCC
Navigate to an interface-specific OSPF prompt and enter
dead-interval
interval
interval is the dead interval expressed in seconds.
For example, the following command causes OSPF to wait 60 seconds on IP
interface 2.2.2.2 for a hello message before declaring the neighbor down.
ospf/2.2.2.2# dead-interval 60
ospf/2.2.2.2#
Network Type Suggested Dead Interval
Broadcast 40 seconds (default)
Point-to-point 60 seconds
NBMA 80 seconds
Point-to-multipoint 60 seconds
Note: This value must be the same for all routers attached to the same
network.
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