Paul,

Are you redistributing any other routes into OSPF?

When you do this it will make your router an ASBR.

Pat

Fri, Mar 26, 2010 at 11:05:25AM -0700, Paul Gerstenberger wrote:


> The best way to transition from our switched network to routed that I can 
> figure is to set up the existing VLANs for our geographic areas as OSPF areas 
> and start dividing off our existing tower sites with mikrotiks on-site. I've 
> had a backbone area set up between our Riverstone (ASBR) and mikrotik routers 
> (ABRs), and now I've created the additional areas for the three vlans.
> 
> The riverstone has the default route out of the network and is DR for 
> backbone area 0 and is only a member of area 0, so it should be the ASBR. By 
> my reckoning, the backbone mikrotiks should be ABRs (members of area 0 and 1, 
> 2, 3), then the tower site mikrotiks will be members of 1, 2, OR 3.
> 
> But, they're all showing as ASBRs, and I'm not understanding why. They're all 
> only running OSPF, and there is only one router (only in area 0) with a 
> static default route out of the network. Any thoughts why I'm seeing this?
> 
> Here is a simple example of my OSPF configuration. In reality the IPs are 
> different and there will be more routers in each zone, but first things 
> first...:
> 
> Area 0 (broadcast), 10.0.0.0/27, riverstone-1 ASBR is 10.0.0.1 and mikrotik-1 
> ABR is 10.0.0.2
> Area 1 (NBMA), 10.0.0.32/27, mikrotik-1 ABR is 10.0.0.33 and mikrotik-2 @ 
> tower A is 10.0.0.34
> Area 2 (NBMA), 10.0.0.64/27, mikrotik-1 ABR is 10.0.0.65 and mikrotik-3 @ 
> tower B is 10.0.0.66
> Area 3 (NBMA), 10.0.0.96/27, mikrotik-1 ABR is 10.0.0.97 and mikrotik-4 @ 
> tower C is 10.0.0.98
> 
> Thanks!
> 
> -Paul
> 
> 
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