Comment 41 for bug 1609898

LaMont Jones (lamont) wrote :

With this fix, my IPv6 service from Comcast broke.

Specifically, they hand out an IP on the /64 via dhcpv6, with the default gateway being an IP on the same /64, along with an IA /56 for the customer to use locally.

Adding the default route fails because there is no route to said gateway (since we have decided that we have a /128).