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OSPF configuration and route preference

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Last Modified: 2012-05-12
I want to create a very simple OSPF network with two links between two devices.  All data to PCs should go over link A unless there is failure in which case data to PCs would go over link B.  All data to IP phones should go over link B unless there is a failure in which case data to IP phones would go over link A.

I believe the config below would start route exchange between the two devices.  But the traffic would here be load balanced as the two links would have the same cost.  How to go about implementing the preferences I described above?  Thank you.

Router A:
router ospf 87
router-id 10.10.69.1
network 10.10.100.0.0 0.0.0.255 area 0

Reouter B:
router ospf 87
router-id 10.10.69.2
network 10.10.20.0 0.0.0.255 area 0
network 10.10.21.0 0.0.0.255 area 0 Network in need of a dynamic routing protocol
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