OSPF - OSPF Configuration - Configuring Classic OSPF Authentication

4 important questions on OSPF - OSPF Configuration - Configuring Classic OSPF Authentication

What is the default authentication with OSPF?

-None (type0) (no authentication)

What is the command to change the default authentication with OSPF?

(config-router)#area ID authentication (clear text)

(config-router)#area ID authentication message-digest (md5)

What is the command to configure type 0 (none) authentication with ospf on an interface?

(config-if)#ip ospf authentication null
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What is the command to check OSPF authentication on an interface?


R1#show  ip ospf interface gigabitEthernet 0/0

GigabitEthernet0/0 is up, line protocol is up
  Message digest authentication enabled

    Youngest key id is 1
R1#

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