Hi Guys

I've done some reading but I am still unclear on the practicality of what I want to implement.

My network currently has 4x different internet breakouts each with each of them having an uplink to a different high site...ie 1 internet breakout per highsite
Currently, I am splitting my high sites into 4 different "groups" and then routing each "group" over the closest internet breakout.
However, I am getting to the stage where some internet breakouts will have fibre bandwidth to upstream provides and others normal ADSL lines. Also, some high sites will have more business clients compared to home clients and vice versa at other sites.

So is it possible to a create different OSPF instances for each "internet breakout" and then inject clients to a specific OSPF instance at from each highsite. So I can route all business clients can go over the fibre, and all cheap uncapped clients can go over the ADSL lines without me having to create 1000x of mangle rules at each highsite. This will also make the failover routing so much simpler as well.

Your thoughts?

Thanks

Just my $.02 here, but I wouldn't run multiple OSPF instances. This will increase CPU/memory load on all of your gear.

From your question it seems like you have multi internet connections, each at a different tower?

I'm thinking that you could have a special portion of your IP addressing set aside for specific routing and just a handfull of routing rules.
EX: subnet is 192.168.0.0/24. If I want client A to do special routing, I assign him an IP address that is 192.168.0.200 or higher. Then I have mangle rules that say if the addressing is .200 or higher I route them to this tower and if it is .199 or lower, just route it regularly.

You could alternately just have another subnet that you assign these clients into that do selective routing.

You could also assign those clients into an MPLS VRF who's internet connection was route leaked from the appropriate border router.

Hi Greg

Correct, I have 4 towers and 4 breakouts. Each tower has 1 breakout.

Currently, I have the clients split into logical subnets which does allow me to use source based routing to send specific clients to their respective breakout. Works well until a tower/ADSL line goes down. (more so the ADSL lines)

However, if one of the ADSL Lines goes down then the traffic does not automatically fail over to another breakout. This is due to the static nature of sourcebased routing (and mangling for that matter).

I like the idea of the MPLS VRF.

Assume the below situation:
-VRF configured accoss the 4 towers for various Home clients
-VRF configured accoss the 4 towers for various Business clients
-2x ADSL breakouts ( Tower A and B)
-2x Fibre breakouts. (Tower C and D)

Would I be able to leake two default routes for each VRF and use some form of costing for failover? So Home clients would use Tower A as the Primary breakout and then failover to Tower B should Tower A go down? Likewise for business clients using Tower C first and then Tower D as a failover

Thanks for your reply