ip tunnel add tun6to4 mode sit ttl 64 remote any local 82.230.52.123
ip link set dev tun6to4 up

ip -6 addr  add 2a01:e35:2e63:47b::1/60 dev tun6to4
ip -6 route add 2000::/3 via ::192.88.99.100 dev tun6to4 metric 1
ip -6 addr  add 2a01:e35:2e63:47b:5678::1/64 dev br-lan