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KumaTea's questions

Martin Hope
KumaTea
Asked: 2020-02-08 09:24:10 +0800 CST
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I'm trying to create a tunnel to HE.net to get an IPv6 address on my (cloud) server.

When I created the tunnel and put this in /etc/network/interfaces:

auto he-ipv6
iface he-ipv6 inet6 v4tunnel
        address <my IPv6 address>
        netmask 64
        endpoint 66.220.7.82
        local <my IPv4 address>
        ttl 255
        gateway <my gateway>

Then ifup he-ipv6, and I got:

error: /etc/network/interfaces: line5: iface he-ipv6: unsupported address method 'v4tunnel'

How can I fix this?

The operating system is Ubuntu 18.04.3.

(I've tried to search this error but it seems nobody ever has it. But I've tried on two separate machine by different providers, and the results are the same.)

Update: add a picture for details:

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Update 2: add a picture of netplan:

Click this

Conclusion: the problem is caused by ifupdown2.

ubuntu ipv6 tunnel