FEC ethernet issues [Was: PL310 errata workarounds]

[robert.daniels at vantagecontrols.com]

Marek Vasut <marex at denx.de> wrote on 03/24/2014 02:21:58 PM:

>
> I think the UDP test might be lossy, can you try with TCP test please ?
>
> Best regards,
> Marek Vasut

Yes, I tried with TCP and there were no problems.
I then tried my same test with a crossover cable: no problems.
Then I started testing some different network configurations:

1. Desktop & i.MX53 both connected to the same router: no problems.
2. Desktop & i.MX53 both connected to the same hub: packet loss but no tx
timeout
3. Desktop connected to router, hub connected to router, i.MX53 connected
to hub: packet loss + tx timeout

So, the packet loss is due to the hub, not the fec driver.
I'm not sure why I'm getting the tx timeout.  My router is a Cisco
ValetPlus and the hub is a Netgear DS108.
The router and desktop are gigabit and the hub is 10/100.

I assumed that the tx timeout should not be happening - is this an
incorrect assumption based on my setup?

Thanks,
- Robert Daniels

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