Dear Members,
With reference to OSPF authentication I would like to clear the following points. * When asked to configure OSPF area wide authentication, we have to define authentication in OSPF Process and also configure interface with key to complete the authentication process like Router ospf 1 Area 0 authentication message-digest Int s 1/0 Ip ospf message-digest-key 1 md5 CCIE In addition, If Virtual link is configured, key & authentication will be configured in OSPF process Area 1 virtual-link 2.2.2.2 authentication message-digest Area 1 virtual link 2.2.2.2 message-digest-key 1 md5 CCIE * When asked to configure OSPF authentication and not specifically mentioned anything, then we could define authentication on interface level like Int s 1/0 Ip ospf authentication message-digest Ip ospf message-digest-key 1 md5 CCIE But virtual link will be authenticated in OSPF process similarly like Router ospf 1 Area 1 virtual-link 2.2.2.2 authentication message-digest Area 1 virtual link 2.2.2.2 message-digest-key 1 md5 CCIE Please correct me if I am wrong. Thank you for your time and comments. Regards / AT
