IP\-MPTCP

Section: Linux (8)
Updated: 4 Apr 2020
Page Index

NAME

ip-mptcp - MPTCP path manager configuration

SYNOPSIS

ip [ OPTIONS ] mptcp { endpoint | limits | help }

ip mptcp endpoint add IFADDR [ dev IFNAME ] [ id ID ] [ FLAG-LIST ]

ip mptcp endpoint del id ID

ip mptcp endpoint show [ id ID ]

ip mptcp endpoint flush

FLAG-LIST := [ FLAG-LIST ] FLAG

FLAG := [ signal | subflow | backup ]

ip mptcp limits set [ subflow SUBFLOW_NR ] [ add_addr_accepted ADD_ADDR_ACCEPTED_NR ]

ip mptcp limits show

DESCRIPTION

MPTCP is a transport protocol built on top of TCP that allows TCP connections to use multiple paths to maximize resource usage and increase redundancy. The ip-mptcp sub-commands allow configuring several aspects of the MPTCP path manager, which is in charge of subflows creation:

The endpoint object specifies the IP addresses that will be used and/or announced for additional subflows:

ip mptcp endpoint add	add new MPTCP endpoint
ip mptcp endpoint delete	delete existing MPTCP endpoint
ip mptcp endpoint show	get existing MPTCP endpoint
ip mptcp endpoint flush	flush all existing MPTCP endpoints

ID

is a unique numeric identifier for the given endpoint

signal

the endpoint will be announced/signalled to each peer via an ADD_ADDR MPTCP sub-option

subflow

if additional subflow creation is allowed by MPTCP limits, the endpoint will be used as the source address to create an additional subflow after that the MPTCP connection is established.

backup

the endpoint will be announced as a backup address, if this is a signal endpoint, or the subflow will be created as a backup one if this is a subflow endpoint

The limits object specifies the constraints for subflow creations:

ip mptcp limits show	get current MPTCP subflow creation limits
ip mptcp limits set	change the MPTCP subflow creation limits

SUBFLOW_NR: specifies the maximum number of additional subflows allowed for each MPTCP connection. Additional subflows can be created due to: incoming accepted ADD_ADDR option, local subflow endpoints, additional subflows started by the peer.
ADD_ADDR_ACCEPTED_NR: specifies the maximum number of ADD_ADDR suboptions accepted for each MPTCP connection. The MPTCP path manager will try to create a new subflow for each accepted ADD_ADDR option, respecting the SUBFLOW_NR limit.

AUTHOR

Original Manpage by Paolo Abeni <pabeni@redhat.com>