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Slow Network Performance, win2k3 std

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Last Modified: 2013-11-09
Hello All!

I have recently installed win 2k 3 standard.  I have the nic card open at 100batetx full.  My local card here in my box is set to the same.  It's slow transferring files, streaming video.  Now, I've updated all of the drivers to the latest ones.  Check cables.  I don't understand when I had Longhorn running before everything was running a lot smoother.  except the box itself.
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A couple of ideas.....
Make sure the MTU size is set properly....
Make sure your network card is NOT set to auto negotiation on your server's network card and the switch port that it's plugged into.
Also, have a look at this article.... many of these registry tweaks have helped me when I"ve experienced this on client's servers.
http://www.speedguide.net/read_articles.php?id=157

Author

Commented:
« SpeedGuide.net TCP Analyzer Results »
Tested on: 10.07.2007 00:13
IP address: 74.142.xx.xxx
 
TCP options string: 020405b4010303010101080a000000000000000001010402
MSS: 1460
MTU: 1500
TCP Window: 75920 (multiple of MSS)
RWIN Scaling: 1
Unscaled RWIN : 37960
Reccomended RWINs: 64240, 128480, 256960, 513920
BDP limit (200ms): 3037kbps (380KBytes/s)
BDP limit (500ms): 1215kbps (152KBytes/s)
MTU Discovery: ON
TTL: 113
Timestamps: ON
SACKs: ON
IP ToS: 00000000 (0)
Find out the MTU Manually by pinging destination with variable sized packets starting at 1500 downwards
also check your dns settings. confirm, you can resolve the target using nslookup

Author

Commented:
Thank, I did the ping test on it. I comes out to 1500.  Also put those tweaks in the registry.  I used the tcp optimizer.  It helped the speeds.  The LAN is still slow.  I tried different cards too.  What I did find out that I had my dsl MTU setting too high for my dsl pppoe setting.  I've add lots of problems running both my cable and my dsl together.  Net settings:

« SpeedGuide.net TCP Analyzer Results »
Tested on: 10.07.2007 10:16
IP address: 74.142.xx.xxx
 
TCP options string: 020405b40103030201010402
MSS: 1460
MTU: 1500
TCP Window: 261360 (NOT multiple of MSS)
RWIN Scaling: 2
Unscaled RWIN : 65340
Reccomended RWINs: 64240, 128480, 256960, 513920
BDP limit (200ms): 10454kbps (1307KBytes/s)
BDP limit (500ms): 4182kbps (523KBytes/s)
MTU Discovery: ON
TTL: 49
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)
Glad you found the problems!

Author

Commented:
Well actually it made things a lot worse.  I tried to reset the tcp stack and winsock.  It didn't help so I rebuilt the box.  That didn't help.  Then I went in and looked at the advanced settings for each nic that I have.  I turned on Adaptive interrupt and turned off hardware flow control.  I'd assume hardware flow control was a good thing.  Also, the rx & tx  buffers are @ 64K with this nic card( VIA Rhine 2),  I tried these same settings on a HP EN1207D-TX.  Didn't work.  I had to put the rx buffer to 32k.  This only FIXED the video streaming problem *NOT* overall speed.
Did you turn off the auto negotiating settings on the nics and switches?
http://www.petri.co.il/speed_up_network_file_copying_in_windows_xp.htm
check that link out as well..

Author

Commented:
That is one of the first things I did was set to 100base TX FULL.  

Author

Commented:
Today performance is bad.  I'm thinking of replacing the nics in this box.  What do you recommend for best performance.  I'm really losing my patience.  A long day of work and all I want to do is stream my Star Trek episodes from my server.
What cable and Switch do you have in your setup?

Author

Commented:
this is my setup for now. sb5101 modem -> wrt300n, off of that 1 w2k3 srv, 1 pap2, my box, 1 port open.  off of my box is a dsl modem.

4 wireless clients.  dhcp, local dns.  powered open dns.  cable connection 10/1, dsl 3/768.  

Author

Commented:
I ran this lil util and it opened up the connection to about 32%.  better but still slow.

NetCPS 1.0 - Entering server mode. Press ^C to quit
Waiting for new connection...
Client connected from 192.168.1.5
---> CPS   2235610.25  KPS:  2183.21  MPS: 2.13
Avrg CPS   2700566.50  KPS:  2637.27  MPS: 2.58
Peek CPS   4632976.00  KPS:  4524.39  MPS: 4.42
Client disconnected. 104857600 Kb transferred in 38.83 seconds.
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Commented:
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