OS2 World.Com Forum

Subject  :  OS/2 and GB network.....
Author  :  calmssea calmssea@gmail.com
Date  :  26 Nov, 2005 on 15:58
So, now I have a solid OS/2 base, running my day to day works and so forth, I have come to notice that enough is not enough..

Here's the story. I have a OS/2 box running eCS 1.2 and a Intel Pro 1000 NIC. Actually, a Pro 1000 on board. Well supported and updated to the latest level.

On the boot, it detects as a 1000Mbps (impressive, it is) connection, and the signal seems to be very clean. I have a few more devices with 1000 NIC, and was one day sending files around those devices. Also I am using 1000 switching hub from buffalo for SOHO. (8 port, but has 2 processors on board)

I have found out that the max speed was around 15~20MBps, (yes, translates to around 150~200Mbps) measured. Of course there are a lot of issues that should affect this, even like disk defragmentations.

Out of curiosity, I tossed around one large file from one machine to my OS/2 box via FTP. It was from XP (NTFS) notebook to OS/2 (JFS with 128 cach specified) and max I could pull was still 20MBps. So fiddling aroud the TCP/IP setting and others, I found the OS/2 MTU was set to 1500.

Now, using Intel's 1000 driver (ver 3.61), is there a way or possiblity to use jumbo frame (or large block) feature for GB NIC's on OS/2?

It would be nice if OS/2 can use Jumbo Frame featur for much faster transfer between such devices.


Subject  :  Re:OS/2 and GB network.....
Author  :  Fahrvenugen
Date  :  27 Nov, 2005 on 07:13
Not sure exactly what you mean by the "Jumbo Frame" feature, but you can play around with the Receive Window Size and Send Window Size in TCP/IP. These settings often show some of the biggest improvements that I've found on SOHO networks.

Type INETCFG /?

from a comand prompt to see that it'll do. you might need:

inetcfg /? | more

Type in
INETCFG -g tcprwinsize
INETCFG -g tcpswinsize

to see what the receive and send window sizes are, and you can change (increase or decrease) them with:

inetcfg -s tcprwinsize <vallue>
inetcfg -s tcpswinsize <vallue>

Hope this helps


Subject  :  Re:OS/2 and GB network.....
Author  :  calmssea calmssea@gmail.com
Date  :  27 Nov, 2005 on 08:14
Well, maybe it's inte;'s marketing phrase.

Jumbo Frame to let TCP packets to have bigger size than default 1422, up to 4K or even 9~16K for frame size.

My above experiement was done doing FTP, and not netbios, which is not the best way to toss files around. Well, since I am getting faster speed than plain ol 100Mbps, I am still cool, but it's never bad to have more speed..


Fahrvenugen (27 Nov, 2005 07:13):
Not sure exactly what you mean by the "Jumbo Frame" feature, but you can play around with the Receive Window Size and Send Window Size in TCP/IP. These settings often show some of the biggest improvements that I've found on SOHO networks.

Type INETCFG /?

from a comand prompt to see that it'll do. you might need:

inetcfg /? | more

Type in
INETCFG -g tcprwinsize
INETCFG -g tcpswinsize

to see what the receive and send window sizes are, and you can change (increase or decrease) them with:

inetcfg -s tcprwinsize <vallue>
inetcfg -s tcpswinsize <vallue>

Hope this helps



Subject  :  Re:OS/2 and GB network.....
Author  :  mobybrick
Date  :  28 Nov, 2005 on 16:33
3.6x is also an older version of the driver. Intel's website has a 4.xx version available for download - don't know if its any good tho!

Regards,
Moby.


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