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Beginner

OSPF Area and Interface Authentication

What is the point of using area authentication when the authentication configuration on the interface overrides any area authentication that is configured?

 

Ex. if message-digest authentication is configured for the area, but null authentication is configured on the interface. 

 

Best regards,

Jason

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VIP Expert

The difference between the two is that for interface authentication you only enable authentication for one link rather than for the whole area. Additionally, if you wanted to only do one type of authentication for certain links and then use a different type (plain text or MD5) then you could use interface authentication.

Configuring Area authentication will enable authentication for the entire area. This is to save some configuration.

Configured at the interface level will override the area configuration command.

 

configuration example :

 

https://community.cisco.com/t5/networking-documents/ospf-authentication/ta-p/3131640



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VIP Expert

The difference between the two is that for interface authentication you only enable authentication for one link rather than for the whole area. Additionally, if you wanted to only do one type of authentication for certain links and then use a different type (plain text or MD5) then you could use interface authentication.

Configuring Area authentication will enable authentication for the entire area. This is to save some configuration.

Configured at the interface level will override the area configuration command.

 

configuration example :

 

https://community.cisco.com/t5/networking-documents/ospf-authentication/ta-p/3131640



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View solution in original post