Can you run a matching "ip -6 route show <route>" between each run?
I suspect that what you're seeing is the kernel caching the route to the link local of your router, essentially duplicating the route in the table. That's fine and would match your symptoms. ** Changed in: iproute (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/930899 Title: iproute2 IPV6: ip route del succeeds but the route remains To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/iproute/+bug/930899/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs