
Customizing OSPF Services
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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.
You can use the BCC or Site Manager to specify a Hello interval.
Using the BCC
To set the Hello interval, navigate to an OSPF interface prompt (for example,
box;
eth 2/2; ip/2.2.2.2/255.255.0.0; ospf
) and enter:
hello-interval
<
interval>
interval
is the 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#
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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