I have been trying to get IPv6 to work with PPPoE. While experimenting I set the following directive:
set interfaces ethernet eth1 pppoe 0 ipv6 address autoconf
While committing the configuration I got the following error:
cat: /proc/sys/net/ipv6/conf/pppoe0/forwarding: No such file or directory sh: line 7: [: =: unary operator expected
I think the problem is the interface name mapping - the Linux interface name is actually ppp0.