Ticket #3484 Correct the case for GRE tunnels as well since they behave the same. GRE seems to need the prefixlen 128 specified all the time so do it explicitly to be on safe side
Related issues
Bug #3484: IPv6 - the gateway address does not lie within one of the chosen interface's subnets
Added by Ermal LUÇI over 11 years ago
Ticket #3484 Correct the case for GRE tunnels as well since they behave the same. GRE seems to need the prefixlen 128 specified all the time so do it explicitly to be on safe side