Trunking internet links with Cisco 3750's

[hill17]

I have a network spread across 4 offices all connected by fiber and Cisco 3750's on a flat network.
At present they all have just one internet connection (t1) terminated in office A. But another leased line (frac t1) has become available in office B. I would like to combine this bandwidth with the T1 in office A but they are in different offices?
I'm thinking that perhaps if I vlan out the frac T1, trunk it across the fiber that will allow me to present it office A. Then perhaps I can bundle them together somehow.
Am I on the right road? Any idea's, suggestions would be greatly appreciated.
Thanks

 

[baddos]

Are the T1's from the same ISP?

 

[hill17]

No, different isp's.

 

[baddos]

You couldn't do per-packet load balancing, but you could do some easy load distribution. Basically saying that one VLAN's default gateway is Router A and the other VLANs are Router B.