Config

configure terminal
interface Tunnel0
 description Securebit IPv6 Tunnel Broker
 no ip address
 ipv6 enable
 ipv6 address 2001:db8:7362::2/64
 tunnel source 18.97.14.80
 tunnel destination 198.51.100.1
 tunnel mode ipv6ip
ipv6 route ::/0 Tunnel0
end
write

auto sbtb-ipv6
 iface sbtb-ipv6 inet6 v4tunnel
  address 2001:db8:7362::2/64
  endpoint 198.51.100.1
  local 18.97.14.80
  ttl 255
  gateway 2001:db8:7362::1

config system sbtb-tunnel
    edit "SBTB"
        set destination 198.51.100.1
        set ip6 2001:db8:7362::2/64
        set source 18.97.14.80
    next
end

config router static6
    edit 1
        set device "SBTB"
    next
end

ifconfig gif0 create
ifconfig gif0 tunnel 18.97.14.80 198.51.100.1
ifconfig gif0 inet6 2001:db8:7362::2 2001:db8:7362::1 prefixlen 128
route -n add -inet6 default 2001:db8:7362::1
ifconfig gif0 up

interfaces {
	ip-0/1/0 {
		unit 0 {
			tunnel {
				source 18.97.14.80;
				destination 198.51.100.1;
			}
			family inet6 {
				address 2001:db8:7362::2/64;
			}
		}
	}
}
routing-options {
	rib inet6.0 {
		static {
			route ::/0 next-hop 2001:db8:7362::1;
		}
	}
}
security {
	forwarding-options {
		family {
			inet6 {
				mode packet-based;
			}
		}
	}
}

ifconfig gif0 create
ifconfig gif0 tunnel 18.97.14.80 198.51.100.1
ifconfig gif0 inet6 2001:db8:7362::2 2001:db8:7362::1 prefixlen 128
route -n add -inet6 default 2001:db8:7362::1

/interface 6to4 add comment="Securebit IPv6 Tunnel Broker" disabled=no local-address=18.97.14.80 mtu=1280 name=sbtb remote-address=198.51.100.1
/ipv6 address add address=2001:db8:7362::2/64 advertise=no disabled=no eui-64=no interface=sbtb
/ipv6 route add comment="" disabled=no distance=1 dst-address=2000::/3 gateway=2001:db8:7362::1 scope=30 target-scope=10

ifconfig gif0 tunnel 18.97.14.80 198.51.100.1
ifconfig gif0 inet6 alias 2001:db8:7362::2 2001:db8:7362::1 prefixlen 128
route -n add -inet6 default 2001:db8:7362::1

configure
edit interfaces tunnel tun0
set encapsulation sit
set local-ip 18.97.14.80
set remote-ip 198.51.100.1
set address 2001:db8:7362::2/64
set description "Securebit IPv6 Tunnel"
exit
set protocols static interface-route6 ::/0 next-hop-interface tun0
commit

netsh interface teredo set state disabled
netsh interface ipv6 add v6v4tunnel interface=IP6Tunnel localaddress=18.97.14.80 remoteaddress=198.51.100.1
netsh interface ipv6 add address interface=IP6Tunnel address=2001:db8:7362::2
netsh interface ipv6 add route prefix=::/0 interface=IP6Tunnel nexthop=2001:db8:7362::1