[vortex] 3c905 hanging when network load is high

[Bogdan Costescu]

On Wed, 9 Jan 2002, Markus Schaub wrote:

> I experienced a problem with my 3c905c when transfering large/many
> files over NFS/FTP to/from my server. All works well (sometimes up to
> 50MB) but suddenly the whole network transfer to/from the server
> stops. Every 30-40 second some bits go through the line, so it is
> possible to reactivate the network with a "ifconfig eth0 down;
> ifconfig eth0 up" via ssh.

Could you please look in the logs an the output of 'dmesg' and see if 
there are any error messages ?

> Pentium 100 PC 

... this might also be a problem as not beeing able to keep up with the 
thansfer.

> 100MBit on a hubbed network

I would first check the media settings using mii-diag (from 
ftp://ftp.scyld.com/pub/diag); there are chances that there is a duplex 
mismatch.

>         Flags: bus master, medium devsel, latency 80, IRQ 12

I don't think that I've ever seen a latency of 80. For all the computers 
that I've seen it was a power of 2 (like 32 of 64). But I think that 80 is 
a legal value so not to worry too much about it...

-- 
Bogdan Costescu

IWR - Interdisziplinaeres Zentrum fuer Wissenschaftliches Rechnen
Universitaet Heidelberg, INF 368, D-69120 Heidelberg, GERMANY
Telephone: +49 6221 54 8869, Telefax: +49 6221 54 8868
E-mail: Bogdan.Costescu@IWR.Uni-Heidelberg.De