Conversation
mptcp

Multipath TCP

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
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chrysn@chaos.social

chrysn

Reply to @mptcp

@mptcp That load balancer use case sounds neat; does this mean the balancer can also shed load by making the subflow take over the brunt, and the balanced flow even closing?

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matttbe@fosstodon.org

Matthieu Baerts

Reply to @chrysn@chaos.social

@chrysn yes indeed. I *think* this idea has already been discussed in more details in a paper or at the IETF (or was it presented by someone already using that in production?).

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