From: Hoyle, Anthony (AL) (ALHoyle@dow.com)
Date: Fri Nov 21 2003 - 18:23:01 GMT-3
You could configure null authentication between 3 and 2. I think when you configure authentication in an area, you have to use
The "area # authentication" command under the OSPF router process. Therefore you have to run simple (at the minimum) or MD5 if you
Choose to between the routers. I would use the "ip OSPF authentication null" command on the interfaces for 2 and 3 -if they ask
you to use authentication in the area as a whole...
OR...couldn't you just run interface specific authentication between the two routers (only in the case where they don't
Ask you to run authentication specifically in the area?)
-I'm pretty sure about it...I'm checking my Cisco OSPF command and configuration handbook now..thoughts anyone?
Hoyle
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Carter, Lee
Sent: Friday, November 21, 2003 2:49 PM
To: 'ccielab@groupstudy.com'
Subject: OSPF Authentication
All,
I have a hub / spoke setup and am working on a lab that has asked me to do the following:
R2=Hub
R1&3 = Spokes in a point-to-multipoint connection
Configure OSPF link authentication between R2 & R1 but NOT R3 and R2.
I can do this using tunnel interfaces but this seems like a lengthy configuration having to deny OSPF to the physical R1 interface and only permit OSPF out the tunnel interfaces...
Is there another creative way to authenticate only part of the routers (r1 &
r2) without bring up authentication on the whole link (r1, r2 & r3)?
Thanks,
Lee
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