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
<pre><code>sudo vim /etc/defaults/grub
</code></pre>Add grub command line defaults "ipv6.disable=1"
GRUB_CMDLINE_LINUX_DEFAULT="loglevel=3 quiet"
<blockquote>
GRUB_CMDLINE_LINUX_DEFAULT="loglevel=3 quiet ipv6.disable=1"
</blockquote>
Ubuntu --&gt;
<pre><code>sudo update-grub
</code></pre>Arch Linux --&gt;
<pre><code>sudo grub-mkconfig -o /boot/grub/grub.cfg
</code></pre>reboot

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="loglevel=3 quiet"

> GRUB_CMDLINE_LINUX_DEFAULT="loglevel=3 quiet ipv6.disable=1"

Ubuntu -->

```
sudo update-grub

``` 

Arch Linux -->

```
sudo grub-mkconfig -o /boot/grub/grub.cfg

``` 

reboot

Suresh Saragadam

Suresh Saragadam

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