set protocols static route6 '::/0' next-hop '::205.171.2.64' interface tun0
Can you explain ::205.171.2.64 ?
An IPv6 address has no dots (.) in it , only colons (Image may be NSFW.
Clik here to view.
Since this is a tunnel, I'd just use next-hop-interface and device name, no need to specify the remote IP
