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DES-7200 Configuration Guide Chapter 4 OSPF
Configuration
4-66
The following information only shows the steps to configure OSPF area
authentication. For other configurations, please refer to the examples shown in
"OSPF Virtual Link".
Configure Switch A
Step 1: In OSPF router configuration mode, specify Area 0 to enable MD5
authentication
SwitchA(config)#router ospf 1
SwitchA(config-router)#area 0 authentication message-digest
SwitchA(config-router)#exit
Step 2: Configure authentication type and authentication key on the interface.
SwitchA(config)#interface gigabitEthernet 0/1
SwitchA(config-if-GigabitEthernet 0/1)#ip ospf message-digest-key 1 md5
hello
Configure Switch B
Step 1: In OSPF router configuration mode, specify Area 0 to enable MD5
authentication
SwitchB(config)#router ospf 1
SwitchB(config-router)#area 0 authentication message-digest
SwitchB(config-router)#exit
Step 2: Configure authentication type and authentication key on the interface.
SwitchB(config)#interface gigabitEthernet 0/3
SwitchB(config-if-GigabitEthernet 0/3)#ip ospf message-digest-key 1 md5
hello
Configure Switch C
! Enable backbone area (Area 0) authentication on Switch C
SwitchC(config)#router ospf 1
SwitchC(config-router)#area 0 authentication message-digest
Verify configurations
Step 1: Display the OSPF information of respective devices when authentication
is only enabled on Switch A and Switch B (not enabled on Switch C).
! Display the virtual link configurations of Switch B
SwitchB#show ip ospf virtual-links
Virtual Link VLINK0 to router 3.3.3.3 is up
Transit area 0.0.0.1 via interface GigabitEthernet 0/3
Local address 192.168.2.1/32
Remote address 192.168.2.2/32