setting 100baseTx-FD

Homer Wilson Smith homer@lightlink.com
Fri May 12 00:36:19 2000


> > insmod insmod /lib/modules/2.2.14-12/net/tulip.o options=5
> 
> Forcing the media here is bad -- see below.

    The same thing happens with the Kingston KNE100TX, the Cisco
Switch doesn't have autonegotiate for the 10baseT ports, only
forced FULL and Half.  If the Switch is in Full, the card will
not autonegotiate (v92 as recommened) but stays in half duplex.

    Homer
> 
> > But tulip-diag -e still reports a 10mpbs connection:
> > tulip-diag.c:v2.00 4/19/2000 Donald Becker (becker@scyld.com)
> >  http://www.scyld.com/diag/index.html
> > Index #1: Found a Digital DS21143 Tulip adapter at 0x2000.
> ...
> >   The NWay status register is 45e1d2ca.
> 
> Your link partner is a very capable switch that wants to autonegotiate.
>   http://scyld.com/expert/NWay.html
> You should let it.
> 
> By forcing the media type you are preventing autonegotiation, and thus
> causing the switch to believe that you are half duplex mode.
> 
> >  Port selection is 10mpbs-serial, full-duplex.
> 
> Hmmm, this is curious.  Something unexpected is going on.
> 
> One of the changes to the v92 (vs. 91g) driver is paying stricter attention
> to the forced media type flag on the 21143, while still using the EEPROM
> media table.  I would normally recommend that you try v92, but the best
> solution is to just not force the media type.
> 
> > EEPROM transceiver/media description for the Digital DS21143 Tulip chip.
> > Leaf node at offset 30, default media type 0800 (Autosense).
> >  2 transceiver description blocks:
> >   Media 10baseT, block type 2, length 6.
> >    Serial transceiver for 10baseT (media type 0).
> >     GP pin direction 08e1  GP pin data 0000.
> >   Media 10baseT-Full Duplex, block type 2, length 6.
> >    Serial transceiver for 10baseT-Full Duplex (media type 4).
> >     GP pin direction 08e1  GP pin data 0000.
> 
> Ahhh, this might be a problem.  The 21143 media table only has 10baseT
> types!  The driver *was* doing the best that it could.  Does your card
> really support 100baseTx?
> 
> >   Internal autonegotiation state is 'Negotiation complete'.
> 
> > while mii-diag reports:
> > 
> > Using the default interface 'eth0'.
> > Basic registers of MII PHY #32:  1000 786c 0000 0000 04a1 45e1 0000 0000.
> 
> The driver is "faking" these registers, and doesn't do a perfect job of it.
> 
> >  Basic mode control register 0x1000: Auto-negotiation enabled.
> >  You have link beat, and everything is working OK.
> >  Your link partner advertised 45e1: Flow-control 100baseTx-FD 100baseTx 
> > 10baseT-FD 10baseT, w/ 802.3X flow control.
> > 
> > What am I missing or doing wrong?  How can I tell my card to run at 100baseT?
> > Any suggestions?  Thank you.
> 
> It's possible to force the setting, but the correct solution is to find out
> why the EEPROM is reporting only 10baseT media types.
> 
> Donald Becker				becker@scyld.com
> Scyld Computing Corporation
> 410 Severn Ave. Suite 210
> Annapolis MD 21403
> 
> 
> -------------------------------------------------------------------
> To unsubscribe send a message body containing "unsubscribe"
> to linux-tulip-request@beowulf.org
> 

-------------------------------------------------------------------
To unsubscribe send a message body containing "unsubscribe"
to linux-tulip-request@beowulf.org