
Customizing OSPF Services
117356-A Rev. A 7-41
Setting the Hello Interval
The hello interval specifies how often the router sends hello messages on the
interface. By default, OSPF transmits a hello message every 10 seconds.
Each type of network has an optimum hello interval. If the interface is connected
to a broadcast network, we suggest you use the default setting -- 10 seconds. We
suggest the following settings for network types supported by OSPF:
You can use the BCC or Site Manager to specify a hello interval.
Using the BCC
Navigate to an interface-specific OSPF prompt and enter
hello-interval
interval
interval is number of seconds between hello messages.
For example, the following command causes OSPF to transmit a hello message
every 20 seconds on IP interface 2.2.2.2.
ospf/2.2.2.2# hello-interval 20
ospf/2.2.2.2#
Network Type Suggested Hello Interval
Broadcast 10 seconds (default)
Point-to-point 15 seconds
NBMA 20 seconds
Point-to-multipoint 15 seconds
Note: This value must be the same for all routers attached to the same
network.
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