MPTCP Redundancy Mode

[aydinj]

I use MPTCP for online gaming in redundant mode to stabilize the lowest possible latency for UDP traffic and send the data replicated through all the active subflows available. I was using OpenMPTCProuter version 0.59.1-5.4. However, after upgrading to 0.60, the Multipath TCP scheduler doesn't have "redundancy." It is missed. Please add it.

[Ysurac]

With kernel 6.1, redundancy mode is no more available.
This will be added back in 6.6 kernel.

[Ysurac]

Via SSH, what is the result of sysctl -a | grep mptcp ?

[pauleharris]

net.ipv4.tcp_available_ulp = espintcp mptcp tls
net.mptcp.add_addr_timeout = 120
net.mptcp.allow_join_initial_addr_port = 1
net.mptcp.checksum_enabled = 0
net.mptcp.enabled = 1
net.mptcp.pm_type = 0
net.mptcp.scheduler = default
net.mptcp.stale_loss_cnt = 4

[Ysurac]

Another scheduler is not used here. I will check what I get.

[Ysurac]

Issue should be fixed, new snapshot is compiling now.

[pauleharris]

thank you for the update.

I tried multiple images from here:
https://snapshots.openmptcprouter.com/6.6/
rpi4 and rpi5 - ext and squash.

They seem to work, boot and run, then after attaching to the server in about 1 minute the rpi's loose all connectivity and I have to reflash. I've updated the server, tried multiple etc.
Thanks

[SpencerXZX]

Has this been resolved? My sysctl -a | grep mptcp shows this:
sysctl: error reading key 'net.ipv6.conf.all.stable_secret': I/O error sysctl: error reading key 'net.ipv6.conf.default.stable_secret': I/O error sysctl: error reading key 'net.ipv6.conf.erspan0.stable_secret': I/O error sysctl: error reading key 'net.ipv6.conf.eth0.stable_secret': I/O error sysctl: error reading key 'net.ipv6.conf.eth1.stable_secret': I/O error sysctl: error reading key 'net.ipv6.conf.eth2.stable_secret': I/O error sysctl: error reading key 'net.ipv6.conf.eth3.stable_secret': I/O error sysctl: error reading key 'net.ipv6.conf.gretap0.stable_secret': I/O error sysctl: error reading key 'net.ipv6.conf.ip6gre0.stable_secret': I/O error sysctl: error reading key 'net.ipv6.conf.ip6tnl0.stable_secret': I/O error sysctl: error reading key 'net.ipv6.conf.lo.stable_secret': I/O error sysctl: error reading key 'net.ipv6.conf.sit0.stable_secret': I/O error sysctl: error reading key 'net.ipv6.conf.teql0.stable_secret': I/O error net.mptcp.add_addr_timeout = 120 net.mptcp.allow_join_initial_addr_port = 1 net.mptcp.checksum_enabled = 0 net.mptcp.enabled = 1 net.mptcp.pm_type = 0 net.mptcp.scheduler = default net.mptcp.stale_loss_cnt = 4

Despite having selected redundancy:

[Ysurac]

Did you try latest snapshot ?

[SpencerXZX]

I only used the 6.6 snapshot on the VPS, do I also need to use it on my router?

[Ysurac]

Yes

[SpencerXZX]

Thanks, that was it. It's fixed now.

[q2go]

On https://snapshots.openmptcprouter.com I see only snapshots for the router – where is the matching snapshot for the VPS?

[Ysurac]

https://github.com/Ysurac/openmptcprouter/wiki/Snapshots