Configuring an authentication mode for a multi-area adjacency interface improves OSPF network security.
The system view is displayed.
The interface view is displayed.
OSPF is enabled on the interface.
OSPF is enabled on the multi-area adjacency interface.
Run the ospf authentication-mode simple [ plain plain-text | [ cipher ] cipher-text ] multi-area area-id command to configure simple authentication for the multi-area adjacency interface.
Run the ospf authentication-mode { md5 | hmac-md5 | hmac-sha256 } [ key-id { plain plain-text | [ cipher ] cipher-text } ] multi-area area-id command to configure ciphertext authentication for the multi-area adjacency interface.
Run the ospf authentication-mode keychain keychain-name multi-area area-id command to configure keychain authentication for the multi-area adjacency interface.
Run the ospf authentication-mode null multi-area area-id command to configure null authentication for the multi-area adjacency interface.
The configuration is committed.