pppd for IPv6 only tunnel

Question

I have this command which works great for IPv4:

sudo pppd updetach noauth passive pty "ssh ubuntu@somehost -i ~/somekey.pem -o Batchmode=yes sudo /usr/sbin/pppd nodetach notty noauth" 10.0.0.1:10.0.0.2

I want to do the same thing with IPv6 (without IPv4) so I try:

sudo pppd updetach noauth passive pty "ssh ubuntu@somehost -i ~/somekey.pem -o Batchmode=yes sudo /usr/sbin/pppd nodetach notty noauth" ipv6 fda3:88f0:3b19:e979::1,fda3:88f0:3b19:e979::2

Unfortunately I get the following error:

pppd: Illegal interface identifier (local): fda3:88f0:3b19:e979::1

How can I get it to work?

Answer 1

The solution is to use an EUI-64 address. It's also possible to just put a , and not specify the addresses.

The final command looks like:

sudo pppd updetach noauth passive pty "ssh ubuntu@somehost -i ~/somekey.pem -o Batchmode=yes sudo /usr/sbin/pppd nodetach notty noauth +ipv6" +ipv6 ipv6 ,