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Re: Weird problem with self-compiled kernel



On Mon, Nov 04, 2002 at 09:39:54PM +0100, Patrick Brunier wrote:
> Everything works fine. But the problem is that I can't connect to
> certain sites.  Eg. When I type "lynx www.openoffice.org" he tries to
> make a http connection but nothing happens.  Also when I type "lynx
> www.davitel.nl" it goes wrong. All other site I have tried do work
> perfectly.  When I switch back to 2.4.18-bf24 I can connect to the
> sites that don't work in 2.4.19.

There are broken (old) routers between you and the sites you're trying
to contact.  They don't support Explicit Congestion Notification (ECN;
see RFC 3168).  You should disable this in your new kernel.  You can do
so at runtime via something in /proc/sys/net/ somewhere (sorry, I don't
know the filename off-hand.  Take a look; it might be fairly obvious.)
Or you can disable ECN at compile time by removing CONFIG_INET_ECN=y
from your .config.

See http://gtf.org/garzik/ecn/ for some useful info about ECN and why
old routers behave the way they do.  RFC 3168 is at
http://www.faqs.org/rfcs/rfc3168.html

noah

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