From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <3BC48D49.6FB5279@mvista.com> Date: Wed, 10 Oct 2001 14:02:49 -0400 From: Dan Malek MIME-Version: 1.0 To: Kevin Fry Cc: linuxppc emb3dd3d list Subject: Re: 8260 Communications Proccessor overload?? References: <3BC3BC07.D6158215@carts.com> Content-Type: text/plain; charset=us-ascii Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: Kevin Fry wrote: > > Has anyone ever run all 3 FCC ports at the same time with a > 100Mbit link? Yeah..... > .... I think I'm seeing the Communications Processor get > overloaded, but Motorola claims there is no problem. What clock speeds are you running? Are they full or half duplex connections? > the Ethernet PHY (AM79C874) indicates no errors, but the MAC is > reporting > CRC errors. Hmmm...Do you ever see any buffering problems on the Linux driver side, like the CPU can't keep up with the data? > .... I have captured the MAC --> PHY transfers on a logic > analyzer > and am decoding them at present (I hate computing a CRC-32 by hand). I > was > hoping someone else has experience relative to this situation. I have seen some noise problems with some boards between the MAC and PHY. Some crappy looking layouts worked great, some really pretty ones had trouble :-). I don't know if this would be represented as a CRC error or something else. Good Luck! Keep us posted :-). -- Dan ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/