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The dead interval must be the same on all routers in the OSPF network.
• Change the time interval between hello-packet transmission.
CONFIG-INTERFACE mode
ip ospf hello-interval seconds
– seconds: the range is from 1 to 65535 (the default is 10 seconds).
The hello interval must be the same on all routers in the OSPF network.
• Use the MD5 algorithm to produce a message digest or key, which is sent instead of the key.
CONFIG-INTERFACE mode
ip ospf message-digest-key keyid md5 key
– keyid: the range is from 1 to 255.
– Key: a character string.
NOTE: Be sure to write down or otherwise record the key. You cannot learn the key after it is
configured. You must be careful when changing this key.
NOTE: You can configure a maximum of six digest keys on an interface. Of the available six
digest keys, the switches select the MD5 key that is common. The remaining MD5 keys are
unused.
• Change the priority of the interface, which is used to determine the Designated Router for the OSPF
broadcast network.
CONFIG-INTERFACE mode
ip ospf priority number
– number: the range is from 0 to 255 (the default is 1).
• Change the retransmission interval between LSAs.
CONFIG-INTERFACE mode
ip ospf retransmit-interval seconds
– seconds: the range is from 1 to 65535 (the default is 5 seconds).
The retransmit interval must be the same on all routers in the OSPF network.
• Change the wait period between link state update packets sent out the interface.
CONFIG-INTERFACE mode
ip ospf transmit-delay seconds
– seconds: the range is from 1 to 65535 (the default is 1 second).
The transmit delay must be the same on all routers in the OSPF network.
Example of Changing and Verifying the cost Parameter and Viewing Interface Status
To view interface configurations, use the show config command in CONFIGURATION INTERFACE
mode.
To view interface status in the OSPF process, use the show ip ospf interface command in EXEC
mode.
Open Shortest Path First (OSPFv2 and OSPFv3)
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