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??
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)
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.
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