OSPF Authentication and Virtual Links

From: Richard Wagner (Richard.Wagner@xxxxxxxxxxxx)
Date: Mon Feb 28 2000 - 19:28:05 GMT-3


   
   
    Title: OSPF Authentication and Virtual Links
    
   When configuring OSPF with multiple areas, I tried implementing md5
   authentication in Area0.
   
   I had the whole mess working without the authentication, and the the
   virtual link was working fine.
   
   When I enable authentication in Area0, the virtual link no longer
   worked.
   
   I pounded on it for a while and just couldn't make it work. I tried a
   few things with no success:
   
   -applying authentication parameters on the virtual-link statements
   (seemed reasonable)
   -applying md5 authentication to all areas and interfaces *everywhere*
   on *every* router (shotgun approach)
   
   (I was hoping that those desparate measures would yield a working
   config where I could remove things one-by-one to determine what was
   really necessary)
   
   The debugs would show (I'm recalling this while at work)... "expected
   type 2, got type 0 for ospf authentication" or something like that
   (sorry for not being exact).
   
   In the end, I removed all authentication statements and the world
   worked again.
   
   There's a "stunt" here... does anybody know what it is?
   
   Thanks for your help everybody!
   
   Richard



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