i used this manual to assign an IPv6 to the virtual machine on OpenVZ. Now my question is how i can veriffy that machine really listens and responds to IPv6 requests?

How i can connect it via SSH?

Host server IPv6:

2001:38d0:2:8f3f:0000:0000:0000:0000 - first ipv6
2001:38d0:2:8f3f:0000:0000:0000:0001 - second ipv6
2001:38d0:2:8f3f:0000:0000:0000:0002 - third IP - the one i assigned to VM

Thank you

there is some info about this topic too and there is another nice guide
probably networking should be set: /etc/sysconfig/network