> The hard part is going to be directing requests to the proxies, and > handling failure well. I haven't done ISP proxy deployments in a long > time, so I'll leave it to others to give you advice on that part. I'm > assuming you'll want it to be transparent (e.g., use WCCP)? If transparent, WCCPv2 has cache failure detection and load balancing. I imagine it would be the easiest/cheapest method if your routers support it.