IPv6: MLD: clamping QRV from 1 to 2! How to disable ipv6 in linux at kernel level

Workaround, if you are not using ipv6, Disable ipv6 at kernel level by passing a kernel parameter at startup, update the grub. Open file to edit sudo vim /etc/defaults/grub Add grub command line defaults "ipv6.disable=1" GRUB_CMDLINE_LINUX_DEFAULT=...