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area virtual-link message-digest-key md5
ip ospf authentication-key
ip ospf authentication message-digest
The no version has no effect.
See area virtual-link authentication-none
Use to enable MD5 authentication and to configure MD5 keys for virtual links.
The MD5 key is a character string up to 16 characters long. You must also specify
a key identifier and whether the key is entered in unencrypted or encrypted
format. If you do not specify which, the string is assumed to be unencrypted.
Example
host1(config-router)#area 27.0.0.0 virtual-link 327.3.4.5 message-digest-key 2
md5 rc45lsm2c
Use the no version to remove the password.
See area virtual-link message-digest-key md5
Use to configure a type 1 authentication (a simple password) on the interface.
Neighboring OSPF routers use the password to access the router's interface.
Use the same password on all neighboring routers on the same network.
Use this password only when you enable authentication for the interface.
You can specify whether the key is entered in unencrypted or encrypted format.
If you do not specify which, the string is assumed to be unencrypted.
Use a password that is a continuous string up to 8 characters long.
Example
host1(config-if)#ip ospf authentication-key yourpwd
Use the no version to remove the password on the interface.
See ip ospf authentication-key
Use to specify the authentication method for the interface as MD5.
You must configure the MD5 key ID and password with the ip ospf
message-digest-key md5 command.
Switching between authentication types does not delete a configured MD5 key
ID or password; only using the no version of that configuration command can
delete the MD5 key ID and password.
Example
host1(config-if)#ip ospf authentication message-digest
Chapter 5: Configuring OSPF
Configuring Authentication
275
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