[tulip-bug] SMC1255TX/LP Problem - TX errors and Carrier errors X2

[Denny Fox]

Hello Juhan,

Thanks very much for your suggestions; I tried them all and still have
the same problem. I also did some further testing.

Tried:
1. Different cat5 cable, and different port
2. Different hub, first was 10BT, second is 10/100BT
2a. Different speeds, Forced 10half and auto-negotiate (to 100baseTx)
3. Different 1255TX, I have two cards, the second on acts the same

Additional:
4. Recompile kernel, making all network interfaces modules. I had
several other nic cards compiled into the kernel, and I wanted to make
sure that any probing that was happening on bootup was not affecting
the 1255TX.
5. Totally differnt system, first was Via EPIA Mini-ITX, second is HP
Kayak XA

This from the HP Kayak:

dmesg
tulip.c:v0.91g 7/16/99 becker@cesdis.gsfc.nasa.gov
eth1: Accton MPX EN5251 rev 17 at 0xf800, 00:04:E2:42:D4:72, IRQ 10.

ifconfig
eth1      Link encap:Ethernet  HWaddr 00:04:E2:42:D4:72
          inet addr:192.168.1.14  Bcast:192.168.1.255
Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:2742 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:1563 dropped:0 overruns:0 carrier:3126
          collisions:0 txqueuelen:100
          Interrupt:10 Base address:0xf800

All tests have the same symptom, no TX packet count, TX errors, TX
carrier errors = 2x TX errors.

The 1255TX does operate at the application level. If you didn't look
at an ifconfig output, you would think that the 1255TX is running OK.

It seems that this continues to point to a problem with the tulip
driver for the SMC1255TX.

Thanks,

Denny

> -----Original Message-----
> From: tulip-bug-admin@scyld.com [mailto:tulip-bug-admin@scyld.com]On
> Behalf Of Juhan Ernits
> Sent: Friday, August 23, 2002 1:06 AM
> To: tulip-bug@scyld.com
> Subject: RE: [tulip-bug] SMC1255TX/LP Problem - TX errors
> and Carrier
> errors X2
>
>
>
>
> On Thu, 22 Aug 2002, Denny Fox wrote:
>
> > ifconfig (another example, not immediately after log data above)
> > eth0      Link encap:Ethernet  HWaddr 00:04:E2:42:D4:72
> >           inet addr:192.168.20.254  Bcast:192.168.20.255
> > Mask:255.255.255.0
> >           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >           RX packets:42 errors:0 dropped:0 overruns:0 frame:0
> >           TX packets:0 errors:14 dropped:0 overruns:0 carrier:24
> >           collisions:0 txqueuelen:100
> >           Interrupt:11 Base address:0xec00
>
> I am not an expert in tulip drivers but according to my
> recent experience
> with it, this does not seem to be a driver problem. It is either:
>
> 1) cabling problem (try replacing the patch cable, check
> another wall
> plug);
> 2) switch problem (e.g. one port in the swich sends half of
> the packets
> to its /dev/null, had this experience with even an expensive cisco
> switch), try another port in the switch or test with another switch;
> 3) hardware problem with the card (least likely), try
> another SMC1255TX.
>
>
> Hope this helps.
>
> Juhan
>
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