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From: Rafal Jaworowski <raj@semihalf.com>
To: u-boot@lists.denx.de
Subject: [U-Boot-Users] Multicast TFTP problems
Date: Wed, 05 Sep 2007 19:06:23 +0200	[thread overview]
Message-ID: <46DEE20F.2090702@semihalf.com> (raw)
In-Reply-To: <46D58DF8.3020209@qstreams.com>

Ben Warren wrote:
> The size of 1468 works fine for me on an MPC8349EMDS board. I captured 
> the transfer using Wireshark (Ethereal) and the numbers match exactly as 
> I've shown above.
> Here are the first few transfers.
> 
[...]
> 
> The only thing I can think of is that something on your network is 
> limiting the MTU size to less than 1500 bytes. Are you using VLANs or 
> PPPoE? Maybe your server has its MTU limited to 1486?
> 

Hi Ben,

Thanks for your help. It turned there was a bug in the MPC5121 FEC 
driver which occured only upon some bigger frames, so it wasn't anything 
MTU-related or the TFTP code. Strangely enough, the frame size offset it 
would or not corrupt coincided with the 46 bytes that are overhead for 
the TFTP...

kind regards,
Rafal

  reply	other threads:[~2007-09-05 17:06 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-08-23  9:41 [U-Boot-Users] Multicast TFTP problems Rafal Jaworowski
2007-08-23 14:07 ` Ben Warren
2007-08-23 14:47   ` David Updegraff
2007-08-29  7:37   ` Rafal Jaworowski
2007-08-29 15:17     ` Ben Warren
2007-09-05 17:06       ` Rafal Jaworowski [this message]
2007-09-05 17:30         ` Ben Warren

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