My current environment consists of a 7204 w/ DS3 card at the core connected to 13 wan locations. Edge routers are 1841's with a single T1 wic and dual FE ports.
We are going metro ether, though I can only bring up one site at a time on ether. This requires supporting two wan configurations(serial and ether) and has exceeding my knowledge of routing within the Cisco world.
I'd like to get some advice on how to prepare for and execute this migration in the coming months. I'll be happy to provide current configs if necessary. Any assistance is greatly appreciated!