make an inter area route perferred over intra area route

[mmercaldieze]

I am setting up ospf between area 1 and area 0 along with 2 9500 switches that are connected to both area 1 and area 0. 9500A and 9500B are connected on the same vlan that is part of area 1, however I need 9500B to prefer the area 0 routes learned from the 9500A rather than 9500B.  Other than creating a 2nd vlan that will neighbor up the switches together on area 2, is there a way to get this done?

[paul driver]

Hello
Ospf will always choose the backbone area non backbone areas and any type 1-2 lsa’s will be preferred over type 3 lsa
Can you post a topology of what your trying to achieve it may be applicable that a virtual-link could be created so then the routes this area its connected could then be advertise it route as intra-area routes.

[Deepak Kumar]

Hi,

The OSPF path selection rules in order as:

Intra-Area (O)
Inter-Area (O IA)
External Type 1 (E1)
External Type 2 (E2)
NSSA Type 1 (N1)
NSSA Type 2 (N2)

But keep in mind that after ISO 15.1.(2) (Not really remember for complete version) this order has changed:

Intra-Area (O)
Inter-Area (O IA)
External Type 1 (E1)

NSSA Type 1 (N1)
External Type 2 (E2)
NSSA Type 2 (N2)

As we need your topology to understand and guide you correct.

Regards,

Deepak Kumar

[Sergey Lisitsin]

mmercaldieze,

You say "I need 9500B to prefer the area 0 routes learned from the 9500A rather than 9500B". That doesn't make much sense. You want 9500B to prefer routes via 9500A rather than via itself? Or do you mean that you want 9500B to route traffic towards area 0 learned routes via 9500A rather than via whatever other gateway it learns them? Can you please clarify.