I had to replace a host on our SolusVM cluster, and I created a new host and went to restore some VPS servers. Everything looked good, I was able to login and see all the VPS servers running but found my IPv6 wasn’t working on just these VPS servers, when I know it has been working before.
This is what were running:
CentOS Linux release 7.4.1708
My IPv4 was working fine but after I stored a VPS to a new host my IPv6 isn’t working correctly.
I tracked the issue down to there was configuration lines missing from my interace. Noramlly these would be in ifcfg-em1, however our SolusVM servers use xenbr0 as a bridged interface. I added the following 4 lines to the interface config.
In that file I added the following lines:
IPV6INIT=yes IPV6_AUTOCONF=yes NETWORKING_IPV6=yes IPV6FORWARDING=yes
Then restarted the network interface
systemctl restart network
After that my VPS started responding to IPv6 ping requests.