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
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