How do I configure OSPF area authentication on the AR router

Run the system-view command to enter the OSPF view.
Run the ospf [ process-id ] command to enter the OSPF process view.
Run the area area-id command to enter the OSPF area view.
Run the authentication-mode simple [ plain plain-text | [ cipher ] cipher-text ] command to configure an authentication mode in the OSPF area.
plain specifies the plain-text password.
cipher specifies the cipher-text password. In MD5/HMAC-MD5 mode, the default value is cipher.
Run the authentication-mode { md5 | hmac-md5 | hmac-sha256 } [ key-id { plainplain-text | [ cipher ] cipher-text } ] command to configure an authentication mode in the OSPF area.
md5 indicates MD5 cipher-text authentication.
hmac-md5 indicates HMAC-MD5 cipher text authentication.
hmac-sha256 indicates HMAC-SHA256 cipher text authentication.
key-id specifies the ID in cipher text authentication.
Run the authentication-mode keychain keychain-name command to configure Keychain authentication in an OSPF area.
Notes:
To use the Keychain verification mode, configure the Keychain information in the system view. Ensure that the values of key-id, algorithm, and key-string in ActiveSendKey of the local and remote ends are the same so that OSPF neighbor relationships can be established.

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