MultiPath TCP

MultiPath TCP (MPTCP) is an effort towards enabling the simultaneous use of several IP-addresses/interfaces by a modification of TCP that presents a regular TCP interface to applications, while in fact spreading data across several subflows. Benefits of this include better resource utilization, better throughput and smoother reaction to failures.

Get sources from mptcp or patch it yourself.

Now, you need to configure kernel:

If you want to use the Coupled Congestion Control, that guarantees fairness across a shared bottleneck, you have to enable

External resources

 * Userspace configuration
 * Official MultiPath TCP for Linux website
 * Official guide How to Install MPTCP
 * Gentoo Bugzilla: Request for adding MPTCP into gentoo-sources
 * MPTCP-related bugzilla