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Re: Baffled by a Cable Modem solved

Date: Thu, 18 Jun 2009 14:40:25 -0400
From: Tony Nelson <tonynelson georgeanelson com>
Subject: Re: Baffled by a Cable Modem solved
To: fedora-list redhat com
Message-ID: <1245350425 19768 0 localhost localdomain>
Content-Type: text/plain; charset=us-ascii

On 09-06-18 11:36:02, John Aldrich wrote:

> My guess... your ISP had something messed up and just waiting fixed
> it. :-)  Even if you called them, they probably would have denied
> there was anything wrong. Or, they might have admitted they had an
> outage or something.  You never know. :-)

 I did call and when I said that it worked OK in Windows, she lost interest. When I said my problem was in using Linux, she didn't hang up - but her brain did. It was much as I expected since they don't claim to support Linux
>  As others have said, you are probably only allowed one IP address
> issued to one MAC address, which timed out overnight, and your attempt
> to use a different MAC address worked in the morning.  If you only ever
> have one machine connected to a network, you can give them both the
> same MAC address, as was already suggested to you.  That won't work f
> you wish to use more than one machine on the network (and Internet) at
> the same time, in which case you should get a small home NAT box /
> Router and configure it to present the expected MAC address (or just
> wait overnigth again).

As far as I understand it ( and I don't claim to ), I used the same MAC address all the time. At least I never changed it.
 I have another computer, ( sort of a standby) that doesn't play in this recent activity. But I used to exchange the ethernet cable from the DSL modem between the two computers (rebooting each time, and had no problems. Of course that is a different network with different policies probably.
TonyN.:'                       <mailto:tonynelson georgeanelson com>
      '                              <http://www.georgeanelson.com/>


Message: 2
Date: Fri, 19 Jun 2009 01:45:12 +0930
From: Tim <ignored_mailbox yahoo com au>
Subject: Re: Baffled by a Cable Modem solved
To: "Community assistance, encouragement,    and advice for using
    Fedora." <fedora-list redhat com>
Message-ID: <1245341712 21824 2 camel suspishus lan cameratim com>
Content-Type: text/plain

On Thu, 2009-06-18 at 11:36 -0400, John Aldrich wrote:
> Or, they might have admitted they had an outage or something. You
> never know. :-)

With one of my old ISPs, anytime you mentioned you had a problem they
either said they'll look into it for you, or they thought it'd be due to
something they were working on (and they'd say what it was).  Even if
you didn't know whether it was true, they didn't piss you off.  Unlike
some other ISPs who always say there's nothing wrong at their end, and
it's all your fault...



>Message: 9
> Date: Thu, 18 Jun 2009 10:52:09 -0500
> From: Bruno Wolff III <bruno wolff to>
> Subject: Re: Baffled by a Cable Modem
> To: Frank Cox <theatre sasktel net>
>Cc: =?ISO-8859-1?Q? Community_assistance, _encouragement,
 >    =09and_advice_for_?= =?ISO-8859-1?Q?using_Fedora.?=
 >   <fedora-list redhat com>
> Message-ID: <20090618155209 GA31920 wolff to>
> Content-Type: text/plain; charset=us-ascii

> On Wed, Jun 17, 2009 at 18:21:14 -0600,
> >  Frank Cox <theatre sasktel net> wrote:
> > On Wed, 17 Jun 2009 18:54:02 -0500
> > Mikkel L. Ellertson wrote:
> >
>  > > Will the modem give the same IP address to another NIC after the
> > > lease has expired, or after you power-cycle the modem?
> >
> > I'm not entirely sure of the answer to that.  I know that power-cycling the
> > modem doesn't change anything in that regard, and further than that I've > > > never
> > asked about.  If I need a modem reset I just call the NOC with the serial
> > number on the modem, the modem lights go off for a few seconds, and
> > when it
> > comes back the reset is complete.

> If you think the mac address is the problem you should be able to test that
> theory by setting the mac address of the linux box to match the windows box
> and see if that gets things working.

> Add a line like the following to the ifcfg-eth? file (and you may need to
> be running the network service as I don't know if network manager uses
> that info):


> Except you want to use the mac address of the windows box.

> You'll want the windows box off the network when you try this.

I apologize for not being more clear about my setup. I only use one computer, which boots fedora, ubuntu, puppy, or Windows XP. When I try the cable modem I connect an ethernet cable from the modem to the integrated nic on the motherboard. Before the cable modem connection was working, to use the internet, I powered down, replaced the cable with another ethernet cable connected to my DSL modem on Verizon.and rebooted. So it is the same computer,  software setup, and nic. When I use Windows on the cable modem or Linux on the cable modem, it is all the same hardware.
 When I was having the problem, In linux I could ping yahoo.com and it sent and recieved packages with no losses and it gave me the IP adress of yahoo. So, DHCP was working (since I had an IP address), It was connected to the net ( to send and recieve packages) and DNS was working (since it resolved yahoo.com) and the MAC addresses of the modem and nic must have been OK.
In linux I tried to connect with many of the addresses in my bookmarks and none of the URLs would connect. exceot google, where I seemed to be able to do anything; gmail, googleearth, search etc. And, If I restarted into Windows XP, firefox connected with everything normally.; with all the same hardware.
 I think it must have been something in the handling of TCP between linux and the modem. The problem is ,for now at least, gone so I can't trouble shoot it any more. The problem is solved in the sense that I don't have it any more - not that I found the problem and fixed it.
  I want to thank you all again for the help.

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