Re: can only ping after kernel upgrade

[Wim De Smet <kromagg@gmail.com>]

Hi,
On Mon, 18 Oct 2004 18:54:45 -0500, Bernie Berg
<bernie@dakotanetwork.com> wrote:
> Justin Guerin wrote:
> > Hi Bernie,
> >
> > Compare the config of the working kernel to the non-working kernel.
> > Specifically, check the networking section.  Also, make sure that the
> > modules listed in the working kernel are either also loaded in the new
> > kernel, or are built into the kernel.  In case you don't know, the config
> > for package kernels is in /boot/config<kernel version>.
> >
> > If you can't figure it out, post the networking section of your new kernel
> > config, and maybe we can help.
> >
> > Justin Guerin
> >
> >
> 
> Thanks for the reply!  I greped NET out of both configs and the only
> diff was the vanilla config had a CONFIG_INET_ECN_DISABLED=Y line,
> otherwise they were the same.  There may have been more I needed to look
> at than that.  In any case I tried 2.6.8 and I don't have the same
> issue, so I am going to leave it at that for now.
> 

ECN is a problem with misconfigured routers that drop packets that use
ECN (instead of just ignoring the field,like they should). So that
might very well be the cause of your problems.

greets,
Wim