ospf route manipulation doesn't work as expected

[sampath1]

Hello Everyone,

PFA, I have recently made a change in our environment where our DC devices connected to our remote sites A & B are on Area 0 and all the remote site devices are in area 200.

I have a opsf cost of 1 in my router A to prefer the path to ISP 1 and Ospf cost of 15000 as back up from router to ISP2(These are backup VPN Tunnels). 

Since the router 2 has presence in Area 0, this router alone is taking the tunnels to ISP 2 and the traffics from router 2 is not hitting the Router-1. Is there any manipulation to fix this issue?

I need the router 2 to consider the ISP-1 as the primary route, all the other devices are going through R1 and taking ISP1 as primary path except R2.

Thanks,

Sam

[Julio E. Moisa]

Hi

Just some questions, The switch is working in L3 mode? or have you verified if Router B has adjacency with Router A and it is learning routes from Router A?

:-)

[Richard Burts]

As I look at the drawing it appears that the connection between the routers is in area 200. It mentions that both routers are in area 0 but does not show how that is. Can you clarify the connection to area 0 for both routers and how they would communicate with each other in area 0? Perhaps the output of show ip ospf from each router would be helpful.

HTH

Rick

[sampath1]

The router B is a secondary router for our Internet links over Site to Site & GRE tunnels using one of our ISP(ISP2). this is our backup link connected to a different DC(lets call this DC2) using Area 0.

Router A is connected to a different DC(lets call it DC1)  using VPLS and this is our primary connection. As I mentioned the switch tarffic goes through router A but router B doesn't go through Router A because the Router B has area 0 presebce with DC2 and its preferring DC2 path even if the OSPF cost is higher.

My target is get the traffic on router B pass thorugh Router A and use the DC1.

For your information, DC1 and DC2 are connected over 10G links with OSPF Area 0.

Hope this helps, Thanks for your time.

[sampath1]

Switch works as L3 mode and Router B doesn't form adjacency with Router A.

[sampath1]

Switch works as L3 mode and Router B doesn't form adjacency with Router A.

it doesn't have to learn the routes from Router A. Router B is connected to Switch using two OSPF routed links & connected to a DC using two tunnels and its forming neighbor ship with all the devices its connected to.