Hi Guys,
why is IPv6 in an IPIP tunnel not working?
I have a IPIP Tunnel Interface and have added an IPv6-Address to that interface.
But both ends can not see each other?!?
IPv4 works.
Is there some missconfiguration or is mikrotik not capable in encapsulate IPv6 in IPIP-Tunnels?
You need ipip6 tunnel.
Thats very bad, because there is no PBR support for IPv6 in ROSv6.xx.
I will try to get my hands on the v7 BETA… Hope that my current setup will work in v7 current development state 
You can use 6to4 (6in4) to tunnel ipv6 traffic over ipv4.
/interface 6to4
add !keepalive name=6to4-branch remote-address=branch.tld
/ipv6 route
add distance=1 dst-address=2001:db8:10:10::/64 gateway=6to4-branch
/interface list member
add interface=6to4-branch list=LAN
/interface 6to4
add !keepalive name=6to4-hq remote-address=hq.tld
/ipv6 address
add address=2001:db8:10:10::1/64 interface=bridgeLocal
/ipv6 route
add distance=1 dst-address=2000::/3 gateway=6to4-hq