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Old 03-18-2005, 08:49 PM   #1
n0xlf
Junior Member
FlashFXP Beta Tester
 
Join Date: Apr 2004
Posts: 13
Default Upload problem with gigabit/jumbo frames...

* FlashFXP v[3.1].[12 ], build [1075 ], [X]registered
* OS [X] WinXP, [ ] Win2K, [ ] Win98, [ ] WinME, [ ] Other
* Running behind NAT/router [X] No
* Running firewall [X] No
* Running Antivirus [X] No
* Network [X] LAN

Took me a while to figure this one out, but here are some strange issues when using FlashFXP with gigabit ethernet on a LAN:

-Uploads using jumbo frames (9k (an MTU of 9000, slightly less than 9K) is pretty standard for the MTU for jumbo frames) go at about 50-60k/sec unless the MTU is lowered to 8232 (which corresponds to 8192k). In my test case, this occurred with my Linux box having an MTU of 9000 and my local machine having one of 9014. I think these both correspond to a 9k MTU, but they are calulated differently (9014 is on an Intel card which I think includes some overhead, and 9000 is on a Broadcom in Linux). Setting the MTU to 8232 on the Linux end worked, with 8233 breaking things again...FTP in DOS with both at 9k works fine...

-Downloading works fine with both set to 9k, although FlashFXP hangs during the transfer and the progress meter either doesn't show anything (with the entire window freezing), or does strange things...Sometimes it hangs entirely, thinking that the file isn't finished, even though it is...I understand that this may just be the limit of pushing over 40,000k/sec to it...

If it matters, both upload and download buffers in FFXP were set to 256k...
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download, flashfxp, ftp, mtu, upload


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