Lwip Ping Test with large packets

["Richard Rauch" <rrauch@xxxxxxxxxx>]

Hi all,

For testing our ethernet driver we are performing several ping tests.
With BSD Stack I am able to answer to ping requests with 60000 Bytes payload
(option -l 60000 at ping command)
But with lwip Stack at 3938 Byte it is a limit.
I am not sure, if it is only a configuration issue (but I have tried already
some other values), if it is a lwip stack problem or a driver problem.

When ping fails, I have a trace output on this source line in
packages/devs/eth/arm/at91/current/src/if_at91.c:

    // If we found SOF but didn't find matching EOF.
    if (sof_idx != -1) {
      AT91_ETH_DEBUG2(true, "AT91_ETH: RX discarding fragments\n");
      priv->rx_head_idx = sof_idx;
    }


Richard Rauch
email: rrauch@xxxxxxxxxx
 
_______________________________________________

ITR GmbH 
Informationstechnologie Rauch 
Schnepfenreuther Hauptstrasse 27b
D-90425 Nuernberg
_______________________________________________


-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss