• 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 congurations, 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.
The bold lines in the example show the change on the interface. The change is reected in the OSPF conguration.
Dell(conf-if)#ip ospf cost 45
Dell(conf-if)#show config
!
interface GigabitEthernet 1/1
ip address 10.1.2.100 255.255.255.0
no shutdown
ip ospf cost 45
Dell(conf-if)#end
Dell#show ip ospf 34 interface
GigabitEthernet 1/1 is up, line protocol is up
Internet Address 10.1.2.100/24, Area 2.2.2.2
Process ID 34, Router ID 10.1.2.100, Network Type BROADCAST,
Cost: 45
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 10.1.2.100, Interface address 10.1.2.100
Backup Designated Router (ID) 10.1.2.100, Interface address 0.0.0.0
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:06
Neighbor Count is 0, Adjacent neighbor count is 0
Dell#
Enabling OSPFv2 Authentication
To enable or change various OSPF authentication parameters, use the following commands.
• Set a clear text authentication scheme on the interface.
CONFIG-INTERFACE mode
ip ospf authentication-key key
Congure a key that is a text string no longer than eight characters.
556
Open Shortest Path First (OSPFv2 and OSPFv3)
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