3Com Ethernet Adaper and Kernel 2.2.2

3Com Ethernet Adaper and Kernel 2.2.2

Post by Stephan Marwede » Wed, 03 Mar 1999 04:00:00



Hi,

I have two webservers with the following configuration:

SuSE Linux Distribution 6.0, Kernel 2.2.2, 128 MB RAM, Adaptec 2940 UW
SCSI,
3Com 3c905B Cyclone Ethernet Adapter, Apache 1.3.4

The only difference between the two boxes is that one of them is a
Compaq Deskpro EN6350 while the other is a noname PC with an Asus P2xx
motherboard.

The Problem is: The Compaq box runs fast and stable while the other box
crashes unexpectedly after a while. There's no entry in the system log
whatsoever, it goes down without leaving any information on where the
error was. This is very bad as I just convinced my customers to use
Linux instead of NT and now I#m in trouble argueing for the Linux
solution.

My questions is: Can the combination of the SCSI adapter with the NIC be
the source of the problem? I read something on Donald Becker's page
about PCI Interrupt Sharing being a potential cause of problem with the
3Com NIC. However, on the Compaq box the SCSI adapter shares the
interrupt with the NIC and everything's runnig fine.

Did anybody experienced similar problems?

Any hints and pointer appreciated.

Regards

Stephan

--
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Stephan Marwedel, Object Technology Group  
THALES Communication GmbH, Hamburg, Germany

Web: http://www.thales.de

-> This message was created 100% Micro$oft free <-
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3Com Ethernet Adaper and Kernel 2.2.2

Post by Henrik Carlqvis » Fri, 05 Mar 1999 04:00:00



> 3Com 3c905B Cyclone Ethernet Adapter, Apache 1.3.4
> The Problem is: The Compaq box runs fast and stable while the other
> box crashes unexpectedly after a while. There's no entry in the
> system log whatsoever, it goes down without leaving any information
> on where the error was.

Is there any difference in network load between the two machines? I have
had problems with machines with 3c900 cards which hangs at heavy network
load. Example of such network load could be being an NFS-server for NFS
installation of Slackware or doing rdist between machines of big file
systems. When those machines hang they do not respond to ping and they
seem completely dead, it is not even possible to toggle the num-lock or
caps-lock leds, only a hard boot would help. By replacing the network
cards I got rid of the problem.

I don't know if this is your problem, the 3c900 is an older card than
yours and is only 10Mbps. However, they use the same driver (3c59x.c).

regards Henrik

 
 
 

1. Kernel 2, Debian 1.1 and 3Com 3c59x ethernet cards

I've just installed Debian 1.1 following their instructions
(from the five floppies ftp's from a Debian mirror) and included
a module to drive my 3Com 3c590 network card.  Everything that
is expected works - with the exception of the network card.  
Needles to say, but I need ftp to be working for the rest of the
installation .... :-(

ifconfig gives the expected info, but a ping to another machine
shows that nothing is working.  Loopback is fine, and ping to my
own IP address is OK.

Has anyone experienced this and knows what's wrong - the network
card works properly under Windows NT (hence my ability to send
this ;-)

Appended is the ifconfig output and the relevant bit from
/var/log/messages that details the loading of the 3c59x device
driver module.....

Thanks in advance

David
http://skpc10.rdg.ac.uk/

/var/log/messages includes this :

Jul 24 00:28:04 sapc68 kernel: 3c59x.c:v0.13 2/13/96

Jul 24 00:28:04 sapc68 kernel:   Overriding PCI latency timer
(CFLT) setting of 64, new value is 255.
Jul 24 00:28:04 sapc68 kernel: loading device 'eth0'...
Jul 24 00:28:04 sapc68 kernel: eth0: 3Com 3c590 Vortex 10Mbps at
0xff80, 00:20:af:fa:41:90, IRQ 10
Jul 24 00:28:04 sapc68 kernel:   32K byte-wide RAM 1:1 Rx:Tx
split, autoselect/10baseT interface.

ifconfig generates this :

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Bcast:127.255.255.255  
Mask:255.0.0.0
          UP BROADCAST LOOPBACK RUNNING  MTU:3584  Metric:1
          RX packets:69 errors:0 dropped:0 overruns:0
          TX packets:69 errors:0 dropped:0 overruns:0

eth0      Link encap:10Mbps Ethernet  HWaddr 00:20:AF:FA:41:90
          inet addr:134.225.167.119  Bcast:134.225.167.255  
Mask:255.255.252.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0
          TX packets:23 errors:0 dropped:0 overruns:0
          Interrupt:10 Base address:0xff80

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