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Ubuntu 20.04 LTS on vServer(OpenVZ) cant config tunnel


I have a vServer running with Ubuntu 20.04.

used the config from the tunnelbroker website:

--- Code: ---auto he-ipv6
iface he-ipv6 inet6 v4tunnel
        address 2001:470:1f0a:xxx::2
        netmask 64
        local 178.2xx.2xx.2xx
        ttl 255
        gateway 2001:470:1f0a:xxx::1
--- End code ---

after saving I tried to restart network interfaces with
service networking restart

and got this message:

--- Quote ---Job for networking.service failed because the control process exited with error code.
See "systemctl status networking.service" and "journalctl -xe" for details.

--- End quote ---

systemctl status networking.service says following:

--- Quote ---Oct 16 01:12:24 vserver1 systemd[1]: Starting Raise network interfaces...
Oct 16 01:12:24 vserver1 ifup[922]: Waiting for DAD... Done
Oct 16 01:12:24 vserver1 ifup[954]: add tunnel "sit0" failed: No such device
Oct 16 01:12:24 vserver1 ifup[890]: ifup: failed to bring up he-ipv6
Oct 16 01:12:24 vserver1 systemd[1]: networking.service: Main process exited, code=exited, status=1/FAILURE
Oct 16 01:12:24 vserver1 systemd[1]: networking.service: Failed with result 'exit-code'.
Oct 16 01:12:24 vserver1 systemd[1]: Failed to start Raise network interfaces.
--- End quote ---

any help how I can make it run? thanks

check if you have module "sit" loaded

(lsmod | grep -w sit)


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