OSPF Notes – Authentication

Corrections appreciated.

Type 0 : No authentication.  This is the default type.

R0(config-if)#ip ospf authentication null
-----
R0(config-router)#area 1 virtual-link 2.2.2.2 authentication null 

Type 1 : Clear text authentication

-----
R0(config-if)#ip ospf authentication
  - or -
R0(config-router)#area 1 authentication
R0(config-if)#ip ospf authentication-key MYKEY live sex online
-----
R0(config-router)#area 1 virtual-link 2.2.2.2 authentication-key MYKEY

Type 2 : MD5 authentication

-----
R0(config-if)#ip ospf authentication message-digest
  - or -
R0(config-router)#area 1 authentication message-digest
R0(config-if)#ip ospf message-digest-key 1 md5 MYKEY
-----
R0(config-router)#area 1 virtual-link 2.2.2.2 authentication message-digest message-digest-key 1 md5 MYKEY
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