Dynamic Routing at the Customer Edge

[Kevin Melton]

I need some assistance from some of the more experienced Network Designers out there.

Here is the situation. I have a customer whom has 2 Edge routers. Both of the Edge routers connect back to the Same ISP. While the same ISP provides the services, the IP addressing schemes are different ( we have a class C space in one, and just one public address in the other. Each one has a PIX 515 behind it heading into the interior of the network.

I want to be able to somehow have the ability to re-route traffic if one of the ISP circuits goes down. I am including a Visio drawing to illustrate.

What can I do to make this happen given the circumstances??

[thomuff]

Can you request more IP addresses for the connection with one public IP address? You would need at least three for each network in the scenario I am thinking of to have automatic failover. It would involve BGP, HSRP, sub interfaces, dot1q trunks Placing a switch between the PIX and the edge routers (capable of vlans)

One for the Pix outside

One for new edge router

One for Old edge router

[Kevin Melton]

Thanks for your response.

As it turns out, we may be moving away from our DSL circuits all together. At that point, i will be challenged with load balancing a Metro Ethernet connnection (4 mg) and the current T1. Perhaps your ideas will still work... I am very interested.

Thanks

Kevin