[support] Destination unreachable from HA on BU???

[Arnaud Ebalard]

Hi,

Mattias Blomqvist <mattias.blomqvist at gmail.com> writes:

> First, thanks everyone for the help. I was obviously looking for
> errors in the wrong place. If someone runs an MN on debian 5.0 kernel
> 2.6.26-1, please tell me how.

Well, it worked when 2.6.26 was the latest kernel. I just had the set of
patches from my repo applied to the kernel.

      http://hg.natisbad.org/migrate2_patches_kernel/

If you want to, you just have to clone the repo and do an hg update to
a version intended for 2.6.26. You will also have to recompile a
version of UMIP with the patches from the same date:

      http://hg.natisbad.org/migrate2_patches_umip_nemo/

> It works ok over a tunnel interface after some trouble.
>
> When mip6d (umip from natisbad.org) is configured with a tunnel
> interface it sometimes segfaults on start leaving ip6tnl-devices up
> etc...
> After setting ulimit to unlimited I can't get it to segfault so no
> core file. :(

That's *very* weird you cannot reproduce it after the ulimit. Can you do
the following *in the same* terminal:

# mipd
segfault
# ulimit -c unlimited
# mip6d                    | repeat till it segfaults
^c                         |

and provide the whole output. 

One thing I would be interested in is having mip6d straced in order to
get some idea of where the segfault happens.

One thing to keep in mind: when umip segfaults, it leaves many things
behind (tunnel, policies, ...) as you noticed. When mip6d is restarted
after that, it does not like that and may fail.

Cheers,

a+