Re: Need guru help with data xfer corruption problem
From: Alexander Clouter (alexander.junk-this.clouter_at_connectfree.co.uk)
Date: 07/26/03
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Date: Sat, 26 Jul 2003 14:27:21 +0100
I was thinking the same. How are you down loading the files, via FTP?
Unlikely but probably worth trying another FTP client on the windoze box,
LeechFTP is my favourite when I have to endure M$ 'Goodness'
(http://stud.fh-heilbronn.de/~jdebis/leechftp/files/lftp13.zip 620k).
I would be surprised if the arrival of corrupt packets was due to your PPPoE
interface and the remote end's exchange; otherwise the packet would of been
dropped and never presented to your LAN, or rather should of not been. What
are the differences in identical downloads, compare the linux downloaded file
to the windows one. Is there a pattern, is it only a few bytes or is the
whole thing toasted. If the whole thing is toasted you might be downloading
binary files in text mode (if using FTP).
If you are downloading the files in the 'correct' manner then it
would start pointing to a strange device beyond your exchange that goes 'hmmm
windoze packets....corrupt and adjust CRCs....'; where you would get such a
device I could only dream about..... ;)
Run 'tethereal' on your gateway box and compare the two downloads; if you do
not understand how to use it, get in touch and we can run the diagnostics and
I can interpret them for you.
Regards
Alex
In article <14384187.0307252128.3e3fc12a@posting.google.com>, Martin Vuille wrote:
> Alexander Clouter <alexander.junk-this.clouter@connectfree.co.uk> wrote in message news:<rgesfb.rbc.ln@127.0.0.1>...
>> I would of thought the same however the files would not arrive corrupt, only
>> download slowly, as the CRC checks in TCP would reject the packet; unless
>> Win2k is REALLY borked :) However I could be wrong.....
>>
>> I am unsure whether you can do it, but can you do the equilivent of
>> 'ifconfig' and get the output that mentions any ethernet frame errors or not?
>> I do not think 'ipconfig /all' can tell you this.
>>
>> Regards
>>
>> Alex
>
> If it were a hardware problem on the LAN side of the Linux box,
> then it seems to me that proxying the requests through Squid
> wouldn't make any difference: the transfers would still fail.
>
> Two additional pieces of information:
>
> - File transfers from the Linux box to the Win2k boxes are 100%
> reliable. I move a lot of data via SMB and have run into no
> errors.
>
> - I monitored both successful and corrupt data transfers by using
> ethereal and capturing the messaging over ppp0. The data arrives
> down the PPPoE pipe already corrupt, so if there's a hardware
> problem in my equipment, it would have to be in the ADSL modem
> or ethernet card. But then why would it only affect transfers
> to the Win2k boxes and not to the Linux box?
>
> MV
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