BGP session with dual peer and failover

[gilson_machado]

I have three sites to interconnect and two SP. One SP connecting two site. The other SP connecting the three sites.

I would like to use my router (7206) to route my company's traffic between the two SP if one of my site have a failure with one of the two SP. Sounds complicate but it can be done. Does anyone have a configuration sample?

Thnaks in advance.

[j-block]

You could connect the First site (say A) to the service provider 1 and the second site B to the SP 2.You could then run BGP between the A and the service provider and between B and the SP. You could then have a link between A and B just to add redundancy. Now you could connect the third site C to either A or B. I guess this is the efficient way of doing this.

[gilson_machado]

In my case one SP1 connects the three sites (A,B,C). The second SP2 only can be connected to two sites(A, B). My question is: In case SP2 fail to provide services to site A, Can I use SP1 to provide routes from A via C to B? What BGP features I have to use ( weight, route map)?

[vinaymurthy]

To answer your question on route selection you use weight commands.

As per as design architecture,

connect A to SP1, SP2 & C to SP1.

What happens if SP1 fails then Site C gets isoloated. So eBGP A & C.

if you want SP1 to provide routes from A via C to B...then use match-as & route maps.