I've seen where people load balanced two T1's on a per packet basis and achieved 1.5 megs on both circuits. Which would give them a total of 3Megs, but the provider said that they are load balancing 1.5 megs over two T1's. I asked different person same provider, that if I'm load balancing two T1's and utilizing 100% on both circuits, isn't that 3Megs of data. They stuck to their guns and yelled 1.5. They couldn't prove it other than the fact that it came down from a higher source. I tried to google my questions for answers but no luck.If load balancing two circuits on the same router you can go with per packet. But it isn't recommended because it can be CPU intensive. But as for load balancing for servers, it is recommended to go with per destination. This will achieve better data transfer and once the connection is established to a server is will use only that T1 until the data transfer is complete so using a per destination you will never achieve more than 1.5. Some ISP's will strongly recommend per destination. I knew of one that would configure customers on a per packet, but is now only doing per destination. Muxing two T1's together with an ATM IMA, I know will give you a 3M circuit. Maybe the provider is right but I was just looking for some facts. I usually do research before I spead gossip.
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