[Babel-users] preferred source address vs babel

[Toke Høiland-Jørgensen]

StarBrilliant <coder at poorlab.com> writes:

> Hi everyone,
>
> I have been looking into this problem for months.
>
> I found that Linux kernel have difficulty determining source address
> for an icmp-ttl-exceeded packet if SADR is used.
>
> Sometimes it will return the primary address as if SADR route does not
> exist; sometimes it will just seallow the reply packet, showing as a
> "???" in the traceroute.
>
> In some rare random situation a machine with two routes like "default
> from 2001.../48" would report "no route to host" when you want to
> connect from it to some random (not all) hosts in the Internet,
> although the machine routes packets from others correctly.
>
> I found that icmp_errors_use_inbound_ifaddr does not work for IPv6,
> and have been trying to port that option to IPv6. I am not sure if it
> can fix the traceroute problem. But I am currently suspending this
> work, hopefully someone else is interested in it.
>
> I agree that we need such an option. That's simply because Linux
> kernel is buggy.

Yeah, this seems buggy. Have you reported the issue on netdev? :)

-Toke