Which Command Would Create a Valid IPv6 Default Route?
It depends on your specific network configuration and the capabilities of your router. In general, the following command would create a valid IPv6 default route:
ipv6 route ::/0 <next-hop-address>
For Example:
ipv6 route ::/0 3ffe:ffff:100:f101::1
This would send all IPv6 traffic with a destination of ::/0 (the “unspecified address”, which is equivalent to 0.0.0.0 in IPv4) to the next-hop address of 3ffe:ffff:100:f101::1.
If your router does not have native IPv6 support, you may need to use an IPv6-in-IPv4 tunnel to reach an IPv6-capable router.
What is a Valid IPv6 Default Route?
A valid IPv6 default route is a route that points to the IPv6 address of the next-hop router. The next-hop router may be your local router if it supports IPv6, or it may be an IPv6-capable router reachable via an IPv6-in-IPv4 tunnel.
In order for traffic to flow correctly, the default route must be valid and reachable. If your router does not have native IPv6 support, you may need to use an IPv6-in-IPv4 tunnel to reach an IPv6-capable router.