TCP Extensions for Multipath Operation with Multiple Addresses

Tue, 05/26/2020 - 11:18 by Olivier Bonaventure


TCP/IP communication is currently restricted to a single path per
connection, yet multiple paths often exist between peers. The
simultaneous use of these multiple paths for a TCP/IP session would
improve resource usage within the network and thus improve user
experience through higher throughput and improved resilience to
network failure.

Multipath TCP provides the ability to simultaneously use multiple
paths between peers. This document presents a set of extensions to
traditional TCP to support multipath operation. The protocol offers
the same type of service to applications as TCP (i.e., a reliable
bytestream), and it provides the components necessary to establish
and use multiple TCP flows across potentially disjoint paths.

This document specifies v1 of Multipath TCP, obsoleting v0 as
specified in RFC 6824, through clarifications and modifications
primarily driven by deployment experience.

Alan Ford, Costin Raiciu, Mark Handley, Olivier Bonaventure and Christoph Paasch
RFC8684, 2020.
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