
Customizing OSPF Services
308627-14.00 Rev 00
6-27
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, you should use the default setting -- 10 seconds. Table 6-4
lists the suggested settings for network types supported by OSPF.
Table 6-4. Hello Interval Settings
Network Type Suggested Hello Interval (seconds)
Broadcast 10 (default)
Point-to-point 15
NBMA 20
Point-to-multipoint 15
Note:
This value must be the same for all routers attached to the same
network.
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