[U-Boot-Users] transmission just works in loopback mode

[Josef Angermeier]

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