Re: Twin laptops - one good NIC configuration - one bad

On Wed, 19 Jun 2002, John Sved wrote:

> As soon as the box is powered the Hub shows the link/ACT (Traffic) lamp
> to be flashing at ~ 1 Hz.   The NIC chip works but very poorly.  A
> direct laptop top laptop test shows acceptably high data transfer rates.
>    The NIC works better with a different Hub but still not correctly.

What cable are you using?  This can happen if the cable is not paired
properly -- the link works during autonegotation at 10Mbps, but fails
with 100Mbps.

> After copying the compiled eepro100-diag to /usr/bin I got the following:
...
> xxxxx:~ # eepro100-diag -e -f
> eepro100-diag.c:v2.08 4/17/2002 Donald Becker ([email protected])
>    http://www.scyld.com/diag/index.html
> Index #1: Found a Intel i82557/8/9 EtherExpressPro100 adapter at 0xdcc0.
...
>     Primary interface chip i82555 PHY #1.
>      Sleep mode is enabled.  This is not recommended.
>      Under high load the card may not respond to
>      PCI requests, and thus cause a master abort.
>      To clear sleep mode use the '-G 0 -w -w -f' options.

This misconfiguration should be corrected (it's an Intel bug), but this
is not your problem.

> xxxxx:~ # eepro100-diag -m -f
>    MII PHY #1 transceiver registers:
>     1000 782d 02a8 0154 05e1 45e1 0003 0000
>     0000 0000 0000 0000 0000 0000 0000 0000
>     0203 0000 0001 1f18 0000 0001 2b43 0001
>     0000 0000 3000 0000 0000 0000 0000 0000.

> Please suggest the next trouble shooting steps.

Run 'mii-diag --watch'.


-- 
Donald Becker				[email protected]
Scyld Computing Corporation		http://www.scyld.com
410 Severn Ave. Suite 210		Second Generation Beowulf Clusters
Annapolis MD 21403			410-990-9993