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PostPosted: Fri Mar 04, 2011 12:37 am 
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I was having an odd issue where my copy/moving files from my WHS to Win7 SP1 was very fast 10.0MB/s, but reversing became very slow (80KB/s). After a bit of poking around and many attempts at correcting the situation, I stumbled upon some info over at sevenforums from a user named Kaffekop that worked perfectly!

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Tried to send large files to WHS. Unsuccessful-network locks up.
Solution at my place: Disable "large Send Offload (ipv4)" Realtek PCIe GBE controller.
Best regards


I am curious if anyone has run into this and if perhaps, anyone would know why this feature would slow/stall transfers to WHS?

Best regards,
Tom

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Last edited by TAdams on Sun Feb 17, 2013 1:24 am, edited 1 time in total.

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PostPosted: Sun Apr 03, 2011 7:09 pm 
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I'm not sure, though perhaps there could be a driver bug.

I've actually used Realtek's OEM drivers from their website to update my Mediasmart box. Going with a new driver might help.

The driver I'm using has a revision of 5.776.1111.2010, dated 11/11/2010.

EDIT: There is a newer driver.

http://www.realtek.com.tw/downloads/downloadsView.aspx?Langid=1&PNid=13&PFid=5&Level=5&Conn=4&DownTypeID=3&GetDown=false

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PostPosted: Mon Dec 12, 2011 4:59 am 
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I can verify that I was having lockups with this chipset both with WHS and WHS2011. I disabled the setting that you specified and everything seems to be working fine now. Thanks a lot! I've been racking my brain on this for about the last month, and was just about to spend money on a different (more compatible) network card. Now that's unnecessary!


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PostPosted: Mon Dec 12, 2011 9:54 am 
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This is a big problem on Dell PE2950 with Broadcom adapters. Oftentimes I dropped in Intel PRO1000 cards and disabled the Broadcom. I'm not quite sure what the IPv4 offloading is supposed to do, sometimes called IPv4 chimney offloading. You can disable it globally through netsh, but I found that disabling it globally negatively impacted network performance on the Intel cards. Luckily the Broadcom utility allowed me to disable it on just the Broadcom cards.

So if network performance seems to be an issue, either inbound or outbound (every instance I've seen has been inbound), your IPv4 offloading may be the guilty party.

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