OSPF custom route

[FranckL]

Hi,

I have differents sites with 2 links between them and central site.

Routers are connected via L2 links with OSPF routing, but they don't have the same bandwith.

Perhaps, I wouldlike to pass a network in one link and the rest of traffic on the other link.

I tried with Policy-Based-Routing but If one link is down the traffic didn't route on the other link.

I searched but I didn't find what I want to do, so I post a new discussion.

Regards,

[Mark Malone]

Hi

PBR is really the way to go here , did you set the next hop ip in the route-map and match it against an acl for those specific subnets , are you saying if the link is down meaning if it fails your route-map doesnt revert to the other working link it keeps sending traffic to the down link ?

If that's the case you could try use ip sla verify reachability with your route-map so it checks is the upstream route available to send to before it does

http://www.firewall.cx/cisco-technical-knowledgebase/cisco-routers/861-cisco-router-pbr-ipsla-auto-redirect.html

[FranckL]

Hi Joseph and Mark,

Thanks a lot for your answers.

I will try PBR with IP SLA.

I'll post if the solution works fine.

Regards,

[Joseph W. Doherty]

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Posting

It should be possible to configure PBR to deal with a link failure, but it does make PBR configuration even a bit more complex.

Are your two links close in bandwidth?  If so, it might be easier to make them appear equal to OSPF and let it route across both of them equally.

If some traffic is more "important" then other traffic, and this is a reason for using PBR, you might meet the same goals using OSPF ECMP with QoS.

If the two links are very dissimilar in bandwidth, PfR might be a better option than PBR.  PfR can also be used with QoS.