R3166-R3206-HP High-End Firewalls Network Management Configuration Guide-6PW101

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4. To configure OSPF packet authentication in and area, configure the same authentication mode
(non-authentication, simple authentication or MD5 authentication) on all the routers of the area.
The authentication mode and password for interfaces attached to a network segment must be
identical. In the web interface configuration, the authentication mode of the interface firstly
configured with authentication information is taken as the authentication mode of the area.