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Re: Network connections breaking after bootup



On Tue, May 15, 2007 at 10:22:50AM +0000, Tim Johnson wrote:
> On Tuesday 15 May 2007 17:33, Antti Talsta wrote:
> > On Tue, 15 May 2007, Tim Johnson wrote:
> > > eth0      Link encap:Ethernet  HWaddr 00:80:AD:79:35:E1
> > >          inet addr:192.168.1.3  Bcast:192.168.1.255  Mask:255.255.255.0
> > >          inet6 addr: fe80::280:adff:fe79:35e1/64 Scope:Link
> > >          UP BROADCAST MULTICAST  MTU:1500  Metric:1
> > >          RX packets:28 errors:248 dropped:0 overruns:0 frame:0
                             ----------
 
> >
>  Hi Antti:
>  1)What do you see that is amiss? 
>     (I'm neither that hardware-savvy or system-savvy)

Tim did underline the suspect area (just as I'm doing above)...

This points towards link-level errors - things like the frame-level 
checksum not matching etc. etc. which ...

> > Faulty netcard or cable ?

... could easily be the result of a faulty (or insufficiently 
shielded) cable...  Or a faulty switch/hub.  Or alternatively: a faulty 
card (but then I'd only expect to see the error count increasing on 
*one* side of the cable).

>   2)If the card or cable was faulty, what would contribute
>      to the behavior of having network connection right away
>      after bootup and login, and then the connection is lost
>      with minutes or *after* an initial connection?

I see your logic, and I don't have a proper explanation... Perhaps the 
underlying network code "gives up" once the error count reaches a 
certain number?  Or perhaps the two are getting further and further 
"out-of-sync" where things eventually fail?  Guesswork on my part...

Hope this helps
-- 
Karl E. Jorgensen
karl@jorgensen.org.uk  http://www.jorgensen.org.uk/
karl@jorgensen.com     http://karl.jorgensen.com
==== Today's fortune:
It's OKAY -- I'm an INTELLECTUAL, too.

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