My current setup is as follows:
Cisco 881 router (only 1 WAN interface) that has a pair of T1's coming in on the WAN interface, this currently provides internet access to two VLANs, 10 and 20.
What is changing:
We are adding another pair of T1's, for a total of two Internet connections.
My thoughts on a solution:
The end goal is to have one pair of T1's be dedicated to VLAN 10 and the other pair to VLAN 20. My thought right now is to add another router that connects to the 881 router that acts as a gateway for the second T1 pair. So I'd have VLAN 10 route to the Internet via the 881 router, and VLAN 20 via a new router that connects to the second pair of T1's. Is this the best setup or would you go about it a different way?