Multipath TCP
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Multipath TCP
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Matthieu Baerts
matttbe@fosstodon.org
Did you know you can have MPTCP support with any devices running Android 16? 😯
OK, it is not easily accessible, but using the included Terminal app 🖥️, you can use MPTCP! 🔀
(Android 16 has a Terminal app which runs a full Linux VM with Debian Bookworm and a kernel 6.1 with MPTCP support. Sadly, Google still didn't add full MPTCP support, despite now using kernels supporting it. If you know people who can change that, please contact me 🙂)
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Edited 1 month ago
Do you use SSH with MPTCP 🔀 for better resilience in mobility use cases or to increase the throughput? Then, feel free to check the new script to pass to ProxyCommand in the SSH config instead of using mptcpize: https://www.mptcp.dev/faq.html#how-to-enable-mptcp-support-with-openssh
Thanks to @shoragan for having shared this script!
(Hopefully the SSH maintainers will allow one of the suggested (1) (2) native MPTCP support at some points!)
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New blog post 📰! What happened the last 9 months around MPTCP 🔀, and which new features will be available in the future LTS v6.18 Linux kernel version: https://blog.mptcp.dev/2025/10/16/v6.18-with-many-features.html
- Better load-balancer deployment support on the client side 🔄
- New 'laminar' endpoints for better controlling addresses signalled by a server 📢
- mptcpd: security review and improvements 🔐
- More apps natively supporting MPTCP 🧑💻
- Misc.: PM, counters, CI, perf, socket options, adaptive ADD_ADDR timeout and future work. 📈
MPTCP or Multipath TCP is an extension to the standard TCP to allow devices to make use of multiple interfaces at once. See https://mptcp.dev for more details.
Thanks to @nlnet for funding part of this work 🎉
#MPTCP #MultipathTCP #Linux
- Better load-balancer deployment support on the client side 🔄
- New 'laminar' endpoints for better controlling addresses signalled by a server 📢
- mptcpd: security review and improvements 🔐
- More apps natively supporting MPTCP 🧑💻
- Misc.: PM, counters, CI, perf, socket options, adaptive ADD_ADDR timeout and future work. 📈
MPTCP or Multipath TCP is an extension to the standard TCP to allow devices to make use of multiple interfaces at once. See https://mptcp.dev for more details.
Thanks to @nlnet for funding part of this work 🎉
#MPTCP #MultipathTCP #Linux
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A 🆕 TCP-in-UDP tool is available, using eBPF 🐝 to translate TCP packets into UDP 🚇 to avoid middleboxes interfering with some TCP extensions like MPTCP 🔀.
Blog post: https://blog.mptcp.dev/2025/07/14/TCP-in-UDP.html
Code and instructions: https://github.com/multipath-tcp/tcp-in-udp
#eBPF #BPF #TCP #MPTCP
Blog post: https://blog.mptcp.dev/2025/07/14/TCP-in-UDP.html
Code and instructions: https://github.com/multipath-tcp/tcp-in-udp
#eBPF #BPF #TCP #MPTCP
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The last Traefik versions 2.11.26 and 3.4.2 have MPTCP support enabled by default 🎉
#Traefik is the Cloud Native Application Proxy: https://traefik.io
#MPTCP is short for Multipath TCP, an extension to TCP to make use of multiple interfaces at once to send and receive TCP packets over a single MPTCP connection: https://mptcp.dev
#Traefik is the Cloud Native Application Proxy: https://traefik.io
#MPTCP is short for Multipath TCP, an extension to TCP to make use of multiple interfaces at once to send and receive TCP packets over a single MPTCP connection: https://mptcp.dev
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The next version of Valkey (8.2) will natively support MPTCP 🔀, thanks to Zhenwei 🎉 and Valkey maintainers:
- https://www.mptcp.dev/apps.html
- https://github.com/valkey-io/valkey/pulls?q=MPTCP
#valkey #MPTCP #Redis #Linux
- https://www.mptcp.dev/apps.html
- https://github.com/valkey-io/valkey/pulls?q=MPTCP
#valkey #MPTCP #Redis #Linux
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A new page has just been added to the MPTCP website to help deploy it behind a stateless L4 load-balancer 🔀
It would be great if CDNs can support MPTCP 😇
https://www.mptcp.dev/load-balancer.html
#MPTCP #Linux #loadbalancer
It would be great if CDNs can support MPTCP 😇
https://www.mptcp.dev/load-balancer.html
#MPTCP #Linux #loadbalancer
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MPTCP changes for Linux 6.15 have just been added to our ChangeLog section:
v6.15: Single subflow optimisation + prepare PM extension
- Optimise MPTCP performance in single subflow mode by ~29%.
- Expose TCP ULP diagnostic info (MPTCP subflows) to non-admin users.
- PM: a lot of cleanups and preparation work (e.g. new pm_kernel.c file) to allow future extensions
- PM: net.mptcp.path_manager (and net.mptcp.available_path_managers) Sysctl knob deprecates net.mptcp.pm_type
- Misc small optimisations and code coverage
https://github.com/multipath-tcp/mptcp_net-next/wiki#changelog
#MPTCP #Linux #kernel
v6.15: Single subflow optimisation + prepare PM extension
- Optimise MPTCP performance in single subflow mode by ~29%.
- Expose TCP ULP diagnostic info (MPTCP subflows) to non-admin users.
- PM: a lot of cleanups and preparation work (e.g. new pm_kernel.c file) to allow future extensions
- PM: net.mptcp.path_manager (and net.mptcp.available_path_managers) Sysctl knob deprecates net.mptcp.pm_type
- Misc small optimisations and code coverage
https://github.com/multipath-tcp/mptcp_net-next/wiki#changelog
#MPTCP #Linux #kernel
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The new networking features for the future6.15 have been accepted in Linus' tree. At the top, we can find:
- Optimize MPTCP performance in single subflow mode by 29%.
🎉
Thanks Paolo for having worked on that!
https://lore.kernel.org/20250326163652.2730264-1-kuba@kernel.org
- Optimize MPTCP performance in single subflow mode by 29%.
🎉
Thanks Paolo for having worked on that!
https://lore.kernel.org/20250326163652.2730264-1-kuba@kernel.org
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OpenWrt 24.10.0 is available: "Activate kernel support for Multipath TCP on devices with big flash sizes." 🎉
All ready to run a transparent proxy to let all clients connected to the router benefit from multiple paths.
https://openwrt.org/releases/24.10/notes-24.10.0
#OpenWrt #MPTCP
All ready to run a transparent proxy to let all clients connected to the router benefit from multiple paths.
https://openwrt.org/releases/24.10/notes-24.10.0
#OpenWrt #MPTCP
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Live from @godevroom 🎉
#MPTCP will be enabled by default on Linux on the server side in the next version!
#MPTCP will be enabled by default on Linux on the server side in the next version!
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There will be an official MPTCP community meetup at FOSDEM this year!
No need to have improvised meetings outside in a cold weather anymore, we can meet on Saturday from 17.30 in H.3242. Feel free to come!
https://fosdem.org/2025/schedule/event/fosdem-2025-6750-mptcp-community-meetup-bof/
#MPTCP #FOSDEM #Brussels
No need to have improvised meetings outside in a cold weather anymore, we can meet on Saturday from 17.30 in H.3242. Feel free to come!
https://fosdem.org/2025/schedule/event/fosdem-2025-6750-mptcp-community-meetup-bof/
#MPTCP #FOSDEM #Brussels
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Edited 11 months ago
#iperf3's next version should support #MPTCP thanks to a new '-m' (or --mptcp) option 🎉
Our PR, initially created in 2021, has recently been merged! It will no longer be needed to use iperf3 with "mptcpize run" on both sides to get MPTCP support, and it is enough to add -m only on the client side!
https://www.mptcp.dev/apps.html
Our PR, initially created in 2021, has recently been merged! It will no longer be needed to use iperf3 with "mptcpize run" on both sides to get MPTCP support, and it is enough to add -m only on the client side!
https://www.mptcp.dev/apps.html
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Nice blog post from Marek (Cloudflare)!
Improvements for the client side are coming (and even already available with an up-to-date kernel ;-) )! Do not hesitate to tell Cloudflare it would be nice if they can support MPTCP on the server side ;-) https://blog.cloudflare.com/multi-path-tcp-revolutionizing-connectivity-one-path-at-a-time/
Improvements for the client side are coming (and even already available with an up-to-date kernel ;-) )! Do not hesitate to tell Cloudflare it would be nice if they can support MPTCP on the server side ;-) https://blog.cloudflare.com/multi-path-tcp-revolutionizing-connectivity-one-path-at-a-time/
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Interested to use #SSH with #MPTCP 🔀? While waiting for a native support in OpenSSH, there are workarounds: a new entry has just been added in our FAQ ⤵️
https://www.mptcp.dev/faq.html#how-to-enable-mptcp-support-with-openssh
https://www.mptcp.dev/faq.html#how-to-enable-mptcp-support-with-openssh
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"#Systemd 257 has been released. As usual, the list of changes is long; it includes support for multipath TCP in socket units" 🎉
https://lwn.net/Articles/1001657/
#MPTCP
Simply add this in your SSH server service file and it will support MPTCP:
[Socket]
SocketProtocol=mptcp
https://lwn.net/Articles/1001657/
#MPTCP
Simply add this in your SSH server service file and it will support MPTCP:
[Socket]
SocketProtocol=mptcp
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What happened around #MPTCP 🔀 last month?
Improvements, bug fixes, security audit, mptcpd 0.13, what's next, etc. Read on to find out more about that ⤵️
https://blog.mptcp.dev/2024/12/04/more-improvements-for-end-users.html
Improvements, bug fixes, security audit, mptcpd 0.13, what's next, etc. Read on to find out more about that ⤵️
https://blog.mptcp.dev/2024/12/04/more-improvements-for-end-users.html
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