A short while ago I disabled IPV6 on my two receivers. I don’t use it here, my ISP doesn’t support it, my router doesn’t support it and so I decided to disable it. I’ve done it on my two feeders.
Straight away, my CPU load dropped by a little over 2% but my network bandwidth by around 50%!
The slight reduction in CPU will help a tiny bit with temperatures, the reduced network bandwidth won’t have much of an effect to anything but it’s interesting that despite nothing here being configured to use IPV6, it clearly has been trying to talk. If and when my ISP ever supports it, I’ll re-enable it but for the time being, it’s staying off.
To disable it, I did the following:
sudo nano /etc/sysctl.conf
Scroll to the bottom and add the following lines:
net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 net.ipv6.conf.lo.disable_ipv6 = 1 net.ipv6.conf.eth0.disable_ipv6 = 1 net.ipv6.conf.wlan0.disable_ipv6 = 1
Save the file and either reboot or use this comand:
sudo sysctl -p
If you get an error saying a fie can’t be found, that’s because you either don’t have an eth0 or a wlan0 port.