[SOLVED] LXC container :: How to enable TCP BBR?

[Giovanni]

root@plex:~# cat /boot/config-$(uname -r) | grep 'CONFIG_TCP_CONG_BBR'


cat: /boot/config-5.4.78-2-pve: No such file or directory

My promox server has TCP BBR enabled on the host, I was looking to ensure its enabled in my LXC containers but haven't found a good guide for doing that... has anyone tried / done this on a LXC container within the host?

https://dannyda.com/2020/10/23/how-...e-speed-up-proxmox-ve-internet-network-speed/

 

[oguz]

hi,

after setting the option in /etc/sysctl.conf of your PVE host and running sysctl -p, restart the container: pct reboot CTID

then go inside and check:

pct enter CTID
sysctl -a 2>/dev/null | grep congestion

and you should see it

 

[Taylan]

sysctl net.ipv4.tcp_congestion_control=bbr or via /proc/sys//proc/sys/net/ipv4/tcp_congestion_control

 

[oguz]

i tried the same as the link you've sent and it worked.

echo "" >> /etc/sysctl.conf
echo "net.core.default_qdisc=fq" >> /etc/sysctl.conf
echo "net.ipv4.tcp_congestion_control=bbr" >> /etc/sysctl.conf
sysctl -p

 

[Giovanni]

hi,

after setting the option in /etc/sysctl.conf of your PVE host and running sysctl -p, restart the container: pct reboot CTID

then go inside and check:

pct enter CTID
sysctl -a 2>/dev/null | grep congestion

and you should see it

thank you! this worked great. I guess I as missing the rebooting the containers. I had wrongly assumed I had to change the settings on each LXC container but looks like it inherits the sysctl settings from the PVE host

 

[oguz]

great! please mark the thread as [SOLVED] so others know what to expect