[U-Boot] Fw: TFTP fails when using network switch

[Loren A. Linden Levy]

Hi All,

Is there something like ethtool in U-boot that I can use to see what
the network negotiated too. This is a fairly cheap netgear switch so I
do not have any diagnostics on it.

I will also have a look with wireshark when i get back to the lab to
see if I can identify what is happening.

Alex

On Wed, 07 Jan 2009 07:52:58 -0500
Jerry Van Baren <gerald.vanbaren at ge.com> wrote:

> Wolfgang Denk wrote:
> > Dear Ulf Samuelsson,
> > 
> > In message <1231282371.32308.276.camel at elrond.atmel.com> you wrote:
> >> It was tracked down to the autoconfiguration of the 
> >> Ethernet PHY, so one of the PHYs ended up in 
> >> 100 Mbps Half Duplex (think that was the switch) 
> >> while the other PHY ended up in 100 MBps Full Duplex.
> > 
> > That would most probably be a bug in the U-Boot ethernet driver, then.
> > 
> > Best regards,
> > 
> > Wolfgang Denk
> 
> If auto-negotiation fails, the default is half duplex (10 or 100 - the 
> speed can be discovered independent of the autonegotiation by the encoding).
> 
> Ulf's recollection that the switch was half duplex would indicate that 
> the cheap switch did not autonegotiate properly, but u-boot did.  This 
> could be a u-boot bug (not setting up the negotiation properly), but 
> more likely would be a switch problem (not handling the u-boot auto-neg 
> options properly).
> 
> gvb
> 


-- 
 -- 
---------------------------------------------
Loren A. Linden Levy
Department of Physics 
390 UCB 
University of Colorado
Boulder, CO   80309-0390
Tel:   303-735-6146 (CU) / +049 040 8998 4789 (DESY) 
Fax:   303-492-3352 (CU) / +049 040 8998 4034 (DESY) 
Cell:  303-332-2768 (U.S.) / +049 (0)151 5496 1831 (Germany)
Email: Loren.Lindenlevy at colorado.edu
url:   http://up.colorado.edu/~lindenle
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