OSPF Route Manipulation

[Simon Young]

Hi

I am looking to change my routing architecture

Requirement

Allow all traffic to go via the primary WAN

Allow one route to go via the secondary WAN

In the event of a WAN drop, everything to use the working link

Current

I have 2 exit points from my network to the same provider, diverse paths

I run iBGP between the routers and the switch, local preference is used and one route goes to secondary, the rest via primary

I use MED to influence traffic inbound from remote sites, BGP to my provider

I run OSPF on the switch to the rest of the network

Future

I'd like to move away from iBGP to OSPF

Can I do the same thing?

How do I manipulate a single route, so that it is preferred via the secondary link?

Thanks

[Joseph W. Doherty · Accepted solution]

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Posting

Can I do the same thing?

Maybe, depends on how your OSPF is setup.  For example, if your route is injected by two different ASBRs, you can cost the route being distributed differently.  If the route is an internal area route, much would depend on your topology, whether you could adjust some transit path cost to favor or disfavor one end-to-end path vs. another.

BGP supports route manipulation very well, OSPF not so much.