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Re: linux-2.4.6-ac2 problem



"Dr. Andrew L. Blais" wrote:
> 
> "Bill Rugolsky Jr." wrote:
> >
> > On Mon, Jul 09, 2001 at 04:08:22PM -0400, Dr. Andrew L. Blais wrote:
> > >       I've compiled linux-2.4.6 using patch-ac2. I used the .config file the
> > > RH linux-2.4.3 RPM. I ran "make oldconfig" making the appropriate
> > > answers where necessary. All went well with all the other makes. I
> > > reboot using vmlinuz-2.4.6-ac2, and there are no error messages. I run
> > > startx, and open netscape. Google comes up, and so do a bunch of other
> > > sites. EXCEPT for some, e.g., www.ibm.com won't come up. Neither will
> > > www.zdnet.com. I reboot into 2.4.3, and www.ibm.com is right there. Back
> > > to 2.4.6-ac2, and no ibm. Back and forth. The same thing. What's up?
> >
> > Perhaps ECN (explicit congestion notification) is enabled in the -ac kernel?
> >
> > Try,
> >
> >    echo 0 > /proc/sys/net/ipv4/tcp_ecn
> >
> > If that fixes it, then those websites probably have misconfigured routers.
> > Read the linux kernel FAQ and send a polite e-mail to the webmaster at the
> > site.
> >
> > You can turn ECN off by placing the following in /etc/sysctl.conf:
> >
> > net.ipv4.tcp_ecn = 0
> >
> > This will set the value to zero each time the system boots.  Linux has
> > it on by default as a way to encourage the rest of the Internet to clean
> > up its act. :-)
> >
> > Regards,
> >
> >     Bill Rugolsky
> >
> > _______________________________________________
> > Seawolf-list mailing list
> > Seawolf-list redhat com
> > https://listman.redhat.com/mailman/listinfo/seawolf-list
> 
> Yes Sir:
> 
> echo 0 > /proc/sys/net/ipv4/tcp_ecn
> 
> did what you said, as well as
> 
> net.ipv4.tcp_ecn = 0
> 
> in /etc/sysctl.conf.
> 
> I was going to ask how I configure the kernel so that ECN is disabled,
> but a quick search of my .config file found CONFIG_INET_ECN, which I
> used "make xconfig" to turn off. A recompile, reinstall, and reboot
> confirmed my guess. I'll let someone else tell IBM that they need to
> "clean up their act" .... Thanks for the help.
> 
> >>> Andrew
> 
> _______________________________________________
> Seawolf-list mailing list
> Seawolf-list redhat com
> https://listman.redhat.com/mailman/listinfo/seawolf-list

I just found this interesting link: 

http://eltoday.com/article.php3?ltsn=2001-04-17-001-14-PS

"Why Can't My 2.4 Kernel See Some Web Sites?"
by Scott Courtney





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