How to listen on a second IPv6 on WAN Interface?

[TechHome]

Hi,
I created a Virtual IP in the "IP Alias" mode, and selected the interface WAN. I added a IPv6 address with /128 prefix, because I'd like to reach WAN with a different IP.

It works until I reboot the firewall. After that, some client's can't reach the firewall (via default route).

Is that normal? What can I do against it? Is Virtual IPs the wrong place to configure this.

Thanks!

[Patrick M. Hausen]

Assign it with the same prefix length as the main one - most probably /64.