From mboxrd@z Thu Jan  1 00:00:00 1970
From: Josef Angermeier <Josef.Angermeier@informatik.stud.uni-erlangen.de>
Date: Thu, 23 Feb 2006 19:39:01 +0100
Subject: [U-Boot-Users] transmission just works in loopback mode
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To: u-boot@lists.denx.de

Dear u-boot users,


i used the MPC875 FEC internal loopback mode and the external
transceiver-loopback mode. In both cases i could send *and* receive the
data. 

But when using no loopback at all, but a (working) crossover cable to
connect the board to a second PC (see below), no packets get received
there. Where could the failure be ? 

MPC875 <-> transceiver(LTX970) <-> RJ45-connector <-> crossover
	-cable <-> second PC with RJ54-connector

my custom board contains a MPC875, whose FEC is connected to a LTX970
transceiver chip, which uses a twisted pair cable interface.

best regards
Josef