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Cisco IOS in a Nutshell, 2nd Edition by James Boney

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Name

ip ospf authentication — interface

Synopsis

ip ospf authentication [message-digest | null]
no ip ospf authentication

Configures

OSPF authentication

Default

No authentication

Description

This command enables OSPF authentication for an interface, to be used if the area authentication command is not enabled. If you enable this command with no options, specify the password with the ip ospf authentiation-key command. If you use the message-digest option, specify the password with the ip ospf message-digest-key command. The null option can be used to disable authentication for this interface if authentication of the entire area has already been configured.

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