Can linux bond (aggregate) several GPRS (sticks)

Question

is it possible to bond (aggregate) multiple connections over GPRS (usb stick) and use it as one link in linux?

Answer 1

It is technically possible. Linux has a module called bonding which can assemble several interfaces into one logical interface. If you set the mode of the bonding interface to balance-rr, it will distribute the packets between the two interfaces. You will also need a server somewhere to reassemble the traffic that will come from your two links.

However, in practice the results with such setups are awful, especially with high latency and high jitter links like GPRS. The main reason is that you get a lot of out of order delivery and protocols like TCP become crazy in these conditions. So the resulting throughput will never reach the total throughput of the two links.