[Avila] fatal ethernet error on gw2348-4

[Gianluca Mando']

David,

did you find some solution to this heavy problem?

We need to operate the avila in bridge mode (it is the most important and basic
feature of any commercial AP ...) and we have descovered that the ethernet
ports filter received frames, while it keeps to be able to transmit frames.
This is a blocking issue for the development of our product.

I think this is a "heavy" bug of the avila board (it cannot be used for
developing neither a simple access point). Gateworks guys providing support for
the board should say if it is a real problem (i.e. it is not caused by some
misconfiguration of bridging feature, but we repeated the test several times,
using the classic bridging commands between eth0 and ath0) and should help us to
provide a solution.

Regards,
Gianluca

Scrive David Acker <dacker at roinet.com>:

> devel wrote:
> > ARGH!!! Its back again. I'm not seeing the fatal error message on the
> > console, but I still from time to time am not receiving on the eth0 port
> > for some computers. I may increase the buffer number from 64 to
> > something else, 128? I'm not sure what that could possibly do to the NPE
> > driver. Any thoughts?
> >
> > Travis
>
> When I mistakenly created a broadcast loop by having two routers
> connected by both ethernet and a wireless connection I found that
> eventually ethernet receive would fail again.  I need to research this
> more.  I believe the problem is related to having ethernet in
> promiscuous mode and lots of broadcast traffic.  Note this quote from
> the intel source about the IX_ETHACC_NE_FILTERMASK flag:
> "Certain frames, which should normally be fully filtered by the NPE to
> due the destination MAC address being on the same segment as the Rx port
> are still forwarded to the XScale (although the payload is invalid) in
> order to learn the MAC address of the transmitting station, if this is
> unknown.  Normally EthAcc will filter and recycle these framess
> internally and no frames with the FILTER bit set will be received by the
> client."
>
>
> I need to walk through this code more deeply.  The first time through I
> was just focused on getting rid of the error message.  Now it seems
> there is another problem.
> -Ack
>
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