Weird network connection problem

[John Brookes]

Recently I've noticed an increase in marginal RJ45 sockets.... Can you get
things to work by 'wiggling' the the connector in the socket (as opposed to
entirely removing and then replacing it)?

Hope this doesn't help (because replacing onboards is.......... I don't even
want to think about it :)

Cheers,

John Brookes
Quadrics
T: +44 (0)117 9155500
F: +44 (0)117 9075395
E: johnb at quadrics.com
W3: www.quadrics.com


> -----Original Message-----
> From: Donald Becker [mailto:becker at scyld.com]
> Sent: 01 October 2002 21:41
> To: Yudong Tian
> Cc: Beowulf (E-mail)
> Subject: RE: Weird network connection problem
> 
> 
> On Tue, 1 Oct 2002, Yudong Tian wrote:
> 
> > > >    We've got 200 nodes running,  with each node having a 
> > > Biostar MB with a
> > > > built-in Realtek 8192
> > > > NIC chip, and running RH 7.2, 2.4-17.
> > > 
> > > Which driver, including version number, are you running?
> > 
> > To be precise, the kernel is 2.4.7-10, the driver is 
> > the default 8139too.o. Do you think I should try 
> > rtl8139.c? 
> 
> Having a mix of working and non-working systems is usually a case
> where we just question the hardware, but it is worth the few 
> minutes to
> try the rtl8139 driver:
>   mkdir /tmp/netdrivers/
>   cd /tmp/netdrivers/
>   ncftp ftp://ftp.scyld.com/pub/network/netdrivers.tgz
>   tar xfvz netdrivers.tgz
>   make
>   make install
> 
> > > >  Any insight where we should look for the problem: 
> hardware? BIOS?
> > > > Driver module? Such a problem does not happen to any nodes
> > > > randomly. It only occurs to those 20 or so particular 
> nodes, which are
> > > > identical to others except their MAC addrs.
> > > 
> > > But this does hint at a hardware problem.
> 
> -- 
> Donald Becker				becker at scyld.com
> Scyld Computing Corporation		http://www.scyld.com
> 410 Severn Ave. Suite 210		Second Generation 
> Beowulf Clusters
> Annapolis MD 21403			410-990-9993
> 
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