OSPF-EIGRP Interesting Scenario

From: Ken.Farrington@barclayscapital.com
Date: Sat Dec 06 2003 - 14:58:30 GMT-3


Hi everyone, Hope you are all very well :)

I have a problem with a scenario, which I need a little help with.

         (50 networks)
         ospf networks
               |
               |
               |
     64k-s0 +----+ 64k-s0
   +---------| Ra |----------+
   | +----+ |
   | ospf ospf |
   | | redist-rtr
+----+ +----+
| Rb |--------------------| Rc |-------------------
+----+ <- eigrp -> +----+ eigrp networks
             1 Gbps (4 networks)

Rb and Rc are running ospf and eigrp - Rc is mutually redistributing
eigrp<->ospf.
Now Rc is receiving eigrp externals with AD 170.

This means that when redist into ospf, Rb is always going to learn the eigrp
routes via the serials and not the 1 gig link becuase of AD.

Can I prevent this with setting distance.

If i set distance on Rc under eigrp, it only sets distance localaly on the
router.
If I set distance on Rb under eigrp, using distance 90 100, I route via the
ethernet
for the rest of the ospf network which I dont want.

I know a good design would be to move the redist to Rb, but assume, that
cannot happen.

The bottom line is that I want to set only the 4 ex eigrp routes to use the
1gig link.

Can any help with with this scenario?

Best Regards,
Ken

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