On Thu, 2003-04-03 at 14:39, Gary Nielson wrote:
> Occasionally, when I reboot my Linux box, I am unable to connect to the
> Internet via my cable modem during the startup process. As redhat runs
> through starting up all the services, dhclient can find no DHCPOFFERS,
> can't get a working lease and I am unable to ping anywhere. Modem appears
> to be operating fine.  Manually invoking /etc/rc.d/init.d/network restart
> usually gets me my connection after I've booted up. Usually. Today that
> didn't even work and I had to power off and power on to get dhcp to find a
> lease on the second power up try.
> 
> What does this sound like to you? Hardware problem? I made no changes at
> all to hardware in-between power ups. Or is it a software problem? If it
> is, how can I diagnose what the problem is next time I'm in that situation
> and get the dhcp working lease without having to power down and up
> again? /var/log/messages just tells me what I reported above.
> 
> Running redhat linux 6.2, kernel 2.2.14 with an Intel NIC.

Might be a NIC problem.  Some older Intel NICs suck (although I do mean
"older", aka EtherExpress 16).  Might be a cable modem problem.  Most
cable modems now require "registration" with your broadband provider. 
Usually this is a one-time thing done at installation of your cable
service, but occasionally the provider requires registering it a second
time for various reasons.  Usually they'll send you an email notifying
you of this.  However, it sometimes looks like spam so you don't read it
<cough mumble>.  The result is usually slower/inconsistent service.

Also, make sure that your modem isn't placed near your monitor or other
source of EMI.  If it is, unplug it (remove power) and put it somewhere
else.  It's common with DSL and cable modems to have EMI problems that
build up over time (sometimes they just stop working altogether, usually
after a period of decreased performance) and the only fix is to power
them off and on again.  But if you don't move it, it'll happen
repeatedly.

Or, finally, it might be a software problem.  But if it works
intermittently, then I doubt it.

-- 
Cliff Wells, Software Engineer
Logiplex Corporation (www.logiplex.net)
(503) 978-6726 x308  (800) 735-0555 x308



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