IPv6 traffic maxes out CPU

Hi all,

I have set up an IPv6 Hurricane Electric tunnel with only this commands:

/interface 6to4 add comment=“Hurricane Electric IPv6 Tunnel Broker” disabled=no local-address=1X1.XXX.X.14 mtu=1280 name=sit1 remote-address=216.XX.84.XX
/ipv6 route add dst-address=2000::/3 gateway=2001:470:XXXX:58::1
/ipv6 address add address=2001:470:XXXX:58::2/64 advertise=yes eui-64=no interface=sit1
/ipv6 address add interface=ether2 address=2001:470:XXXX:58::1/64 advertise=yes

But when I have some IPv6 traffic my Mikrotik CPU spikes around 80%. If i download the same file over ipv4 it only reaches ~15%. The service that I use is: http://speedtest6.ziggo.nl but also happens when I watch a video on YouTube.

If i need to specify something please ask:)

FakeFlamingo

Encapsulation and decapsulation into the tunnel takes a lot more resources than plain ipv4 forwarding.