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Re: [lwip-users] ping flood crash
From: |
mobin.seven |
Subject: |
Re: [lwip-users] ping flood crash |
Date: |
Wed, 10 Sep 2014 04:20:27 -0700 (MST) |
FreeRTOS info wrote
>> why ? and how to check it?
>
> ...because you said the error was "temac error interrupt: rx fifo over
> run". So presumably the driver is using a FIFO to store received
> packets, but the rate at which packets have been received was too fast
> for the CPU to process, so the FIFO became full and the driver returned
> an error. Therefore the problem occurred in the driver, before the
> packets were ever sent to lwIP. This is a perfectly legitimate
> scenario, and not really an error. If there is no space to store the
> packets then the packets will have to be dropped. If the dropped
> packets contained TCP data then the TCP protocol will take care of
> ensuring they get re-sent. If the dropped packets contained UDP data
> then you lucked out - if they need to be re-sent then that has to be
> done from the application level.
>
> Regards,
> Richard.
>
> + http://www.FreeRTOS.org
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Thanks. a lot of good information.
you are right . there's a patch in xilinx site around this issue.
http://www.xilinx.com/support/answers/32092.htm
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