IPv6 on interface won't come up

RouterOS General
1

I’m trying to configure a vpn connection and route IPv6 over it.

Irrespective of putting a /64 or a /127 IP address on the interface it always shows that the gateway is unreachable.

I am sure I am doing something stupid, but I’ve spent a bunch more time on this than I should and I can’t work it out.

Flags: X - disabled, A - active, D - dynamic, C - connect, S - static, r - rip, o - ospf, b - bgp, U - unreachable 
 #      DST-ADDRESS              GATEWAY                  DISTANCE
 0 ADC  2406:a000:2f72::/127     sstp-out-aicial-au              0
 1 ADC  2406:a000:2f72:2::/64    bridge-local                    0

Screen Shot 2016-03-21 at 5.23.34 PM.png
The interface is up, works with v4 - I’m just lost.

2

RouterOS does not support /127 network mask for IPv6 addresses as it was at first discarded due to underlying issues, try /128 if you can as that is more suitable for tunnel interfaces. But some company continued to push for years to get that /127 can be used.

http://packetlife.net/blog/2010/may/6/ipv6-127-prefixes/

3

Thank you - but I’ve tried /64 as well as I said in the original message.

I can’t get any network to leave the “unreachable” state.

I have a suspicion that RouterOS doesn’t support IPv6 on VPN connections?