tweak my LAN

[Rahman Rahadiansyah Ahmad]

hi i have 3 mbits conection and it shared with 11 pc. They all connected to tp link ADSL 2 modem router. Each pc are being limited of 1 mbits connection. Right now my bandwidth connection manager are being handled by a software called Softperfect bandwidth manager.

So how do i tweak each PC of my LAN.

Here are the result from one of my LAN PC ( my own PC- unlimited 3mbits)

« SpeedGuide.net TCP Analyzer Results » 
Tested on: 09.18.2011 04:15 
IP address: 118.96.xxx.xxx 
Client OS: Windows XP 
 
TCP options string: 020405780103030101010402 
MSS: 1400 
MTU: 1440 
TCP Window: 130680 (NOT multiple of MSS) 
RWIN Scaling: 1 bits (2^1=2) 
Unscaled RWIN : 65340 
Recommended RWINs: 64400, 128800, 257600, 515200, 1030400 
BDP limit (200ms): 5227kbps (653KBytes/s)
BDP limit (500ms): 2091kbps (261KBytes/s) 
MTU Discovery: ON 
TTL: 49 
Timestamps: OFF 
SACKs: ON 
IP ToS: 00000000 (0)

how to change MTU size it jst seems keep geting back to 1440 ?

[Philip]

I'd set the RWIN value to 64400 on all PCs, other than that you can use the optimal settings in the TCP Optimizer.

[Rahman Rahadiansyah Ahmad]

Thanks. i,m getting 63360 RWIN on tcp optimizer page,.bt im following your suggestion

[Philip]

It is best if RWIN is multiple of MSS (MTU - headers), that's why the slightly different number. It is a buffer so it should work well either way, the small difference only comes into play if the buffer is completely full.

[Rahman Rahadiansyah Ahmad]

« SpeedGuide.net TCP Analyzer Results »
Tested on: 12.04.2011 23:35
IP address: 125.163.xx.xx
Client OS: Windows XP

TCP options string: 020405780103030001010402
MSS: 1400
MTU: 1440
TCP Window: 64400 (multiple of MSS)
RWIN Scaling: 0 bits
Unscaled RWIN : 64400
Recommended RWINs: 64400, 128800, 257600, 515200, 1030400
BDP limit (200ms): 2576kbps (322KBytes/s)
BDP limit (500ms): 1030kbps (129KBytes/s)
MTU Discovery: ON
TTL: 51
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

this is from my own pc 2 mbit line.

from modem tplink td 8817 the MTU = 1480 and MSS = 1400.

[Rahman Rahadiansyah Ahmad]

changes has been made in my LAN, now my internet connection is downgraded to 2 mbit lane. and i,m using gatewy/server pc.

Question, should i apply TCP optimizer on gateway/server PC ? and any recomedation for the TCP windows . Gateway pc is using windows xp.

thanks, and thanks especially to Phillips