The tweaks are not working for me

[djdansays]

These are my settings but the values are different in the registry. I changed but still these values come. My MTU is 1492 but here it says it is 1400 and RWIN is 130560 but here it is something different. What should I do?

« SpeedGuide.net TCP Analyzer Results »
Tested on: 01.12.2007 11:48
IP address: 59.92.xxx.xxx

TCP options string: 0204055001010402
MSS: 1360
MTU: 1400
TCP Window: 17680 (multiple of MSS)
RWIN Scaling: 0
Unscaled RWIN : 17680
Reccomended RWINs: 65280, 130560, 261120, 522240
BDP limit (200ms): 707kbps (88KBytes/s)
BDP limit (500ms): 283kbps (35KBytes/s)
MTU Discovery: ON
TTL: 48
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

[trogers]

What speed are you supposed to get? Are you using a router?

Do this test and post the reports under the 'Statistics' and 'More Details' buttons:

http://miranda.ctd.anl.gov:7123/

[djdansays]

TCP/Web100 Network Diagnostic Tool v5.3.4e
click START to begin
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client to server) . . . . . 272.68Kb/s
running 10s inbound test (server to client) . . . . . . 414.11kb/s
Your PC is connected to a Cable/DSL modem
Information: The receive buffer should be 122445.0 Kbytes to maximize throughput

click START to re-test

[djdansays]

Test Results:

TCP/Web100 Network Diagnostic Tool v5.3.4e
click START to begin
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client to server) . . . . . 272.68Kb/s
running 10s inbound test (server to client) . . . . . . 414.11kb/s
Your PC is connected to a Cable/DSL modem
Information: The receive buffer should be 122445.0 Kbytes to maximize throughput

click START to re-test

Statistics:

WEB100 Enabled Statistics:
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client to server) . . . . . 272.68Kb/s
running 10s inbound test (server to client) . . . . . . 414.11kb/s

------ Client System Details ------
OS data: Name = Windows XP, Architecture = x86, Version = 5.1
Java data: Vendor = Sun Microsystems Inc., Version = 1.5.0_10

------ Web100 Detailed Analysis ------
Cable modem/DSL/T1 link found.
Link set to Full Duplex mode
No network congestion discovered.
Good network cable(s) found
Normal duplex operation found.

Web100 reports the Round trip time = 326.52 msec; the Packet size = 1360 Bytes; and
No packet loss was observed.
This connection is receiver limited 89.97% of the time.
Increasing the the client's receive buffer (17.0 KB) will improve performance
This connection is network limited 10.0% of the time.

Web100 reports TCP negotiated the optional Performance Settings to:
RFC 2018 Selective Acknowledgment: ON
RFC 896 Nagle Algorithm: ON
RFC 3168 Explicit Congestion Notification: OFF
RFC 1323 Time Stamping: OFF
RFC 1323 Window Scaling: OFF
Information: Network Middlebox is modifying MSS variable
Server IP addresses are preserved End-to-End
Information: Network Address Translation (NAT) box is modifying the Client's IP address
Server says [59.92.183.191] but Client says [192.168.xx.xx]

More Details:

WEB100 Kernel Variables:
Client: localhost/127.0.0.1
AckPktsIn: 368
AckPktsOut: 0
BytesRetrans: 0
CongAvoid: 0
CongestionOverCount: 0
CongestionSignals: 0
CountRTT: 368
CurCwnd: 19040
CurMSS: 1360
CurRTO: 550
CurRwinRcvd: 17680
CurRwinSent: 5840
CurSsthresh: 2147483647
DSACKDups: 0
DataBytesIn: 0
DataBytesOut: 518160
DataPktsIn: 0
DataPktsOut: 381
DupAcksIn: 0
ECNEnabled: 0
FastRetran: 0
MaxCwnd: 19040
MaxMSS: 1360
MaxRTO: 960
MaxRTT: 450
MaxRwinRcvd: 17680
MaxRwinSent: 5840
MaxSsthresh: 0
MinMSS: 1360
MinRTO: 540
MinRTT: 310
MinRwinRcvd: 17680
MinRwinSent: 5840
NagleEnabled: 1
OtherReductions: 0
PktsIn: 368
PktsOut: 381
PktsRetrans: 0
X_Rcvbuf: 107520
RcvWinScale: 7
SACKEnabled: 3
SACKsRcvd: 0
SendStall: 0
SlowStart: 12
SampleRTT: 320
SmoothedRTT: 320
X_Sndbuf: 107520
SndWinScale: 0
SndLimTimeRwin: 9037511
SndLimTimeCwnd: 1004357
SndLimTimeSender: 3041
SndLimTransRwin: 1
SndLimTransCwnd: 1
SndLimTransSender: 1
SndLimBytesRwin: 485520
SndLimBytesCwnd: 32640
SndLimBytesSender: 0
SubsequentTimeouts: 0
SumRTT: 120160
Timeouts: 0
TimestampsEnabled: 0
WinScaleRcvd: 0
WinScaleSent: 7
DupAcksOut: 0
StartTimeUsec: 449422
Duration: 10047083
c2sData: 2
c2sAck: 2
s2cData: 2
s2cAck: 2
half_duplex: 0
link: 100
congestion: 0
bad_cable: 0
mismatch: 0
spd: 0.00
bw: 31.78
loss: 0.000001000
avgrtt: 326.52
waitsec: 0.00
timesec: 10.00
order: 0.0000
rwintime: 0.8997
sendtime: 0.0003
cwndtime: 0.1000
rwin: 0.1349
swin: 0.8203
cwin: 0.1453
rttsec: 0.326522
Sndbuf: 107520
aspd: 0.00000

Checking for mismatch on uplink
(speed > 50 [0>50], (xmitspeed < 5) [0.27<5]
(rwintime > .9) [0.89>.9], (loss < .01) [1.0E<.01]
Checking for excessive errors condition
(loss/sec > .15) [1.0E>.15], (cwndtime > .6) [0.1>.6],
(loss < .01) [1.0E<.01], (MaxSsthresh > 0) [0>0]
Checking for 10 Mbps link
(speed < 9.5) [0<9.5], (speed > 3.0) [0>3.0]
(xmitspeed < 9.5) [0.27<9.5] (loss < .01) [1.0E<.01], (mylink > 0) [3.0>0]
Checking for Wireless link
(sendtime = 0) [3.0E=0], (speed < 5) [0<5]
(Estimate > 50 [31.78>50], (Rwintime > 90) [0.89>.90]
(RwinTrans/CwndTrans = 1) [1/1=1], (mylink > 0) [3.0>0]
Checking for DSL/Cable Modem link
(speed < 2) [0<2], (SndLimTransSender = 0) [1=0]
(SendTime = 0) [3.0E-4=0], (mylink > 0) [3.0>0]
Checking for half-duplex condition
(rwintime > .95) [0.89>.95], (RwinTrans/sec > 30) [0.1>30],
(SenderTrans/sec > 30) [0.1>30], OR (mylink <= 10) [3.0<=10]
Checking for congestion
(cwndtime > .02) [0.1>.02], (mismatch = 0) [0=0]
(MaxSsthresh > 0) [0>0]

estimate = 31.78 based on packet size = 10Kbits, RTT = 326.52msec, and loss = 1.0E-6
The theoretical network limit is 31.78 Mbps
The NDT server has a 105.0 KByte buffer which limits the throughput to 2.51 Mbps
Your PC/Workstation has a 17.0 KByte buffer which limits the throughput to 0.41 Mbps
The network based flow control limits the throughput to 0.44 Mbps

Client Data reports link is 'T1', Client Acks report link is 'T1'
Server Data reports link is 'T1', Server Acks report link is 'T1'

[djdansays]

Should I try Dr. TCP? Is it safe? I am sorry I am not used to it.

[trogers]

Test Results:

TCP/Web100 Network Diagnostic Tool v5.3.4e
click START to begin
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client to server) . . . . . 272.68Kb/s
running 10s inbound test (server to client) . . . . . . 414.11kb/s
Your PC is connected to a Cable/DSL modem
Information: The receive buffer should be 122445.0 Kbytes to maximize throughput

click START to re-test

Statistics:

WEB100 Enabled Statistics:
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client to server) . . . . . 272.68Kb/s
running 10s inbound test (server to client) . . . . . . 414.11kb/s

------ Client System Details ------
OS data: Name = Windows XP, Architecture = x86, Version = 5.1
Java data: Vendor = Sun Microsystems Inc., Version = 1.5.0_10

------ Web100 Detailed Analysis ------
Cable modem/DSL/T1 link found.
Link set to Full Duplex mode
No network congestion discovered.
Good network cable(s) found
Normal duplex operation found.

Web100 reports the Round trip time = 326.52 msec; the Packet size = 1360 Bytes; and
No packet loss was observed.
This connection is receiver limited 89.97% of the time.
Increasing the the client's receive buffer (17.0 KB) will improve performance
This connection is network limited 10.0% of the time.

Web100 reports TCP negotiated the optional Performance Settings to:
RFC 2018 Selective Acknowledgment: ON
RFC 896 Nagle Algorithm: ON
RFC 3168 Explicit Congestion Notification: OFF
RFC 1323 Time Stamping: OFF
RFC 1323 Window Scaling: OFF
Information: Network Middlebox is modifying MSS variable
Server IP addresses are preserved End-to-End
Information: Network Address Translation (NAT) box is modifying the Client's IP address
Server says [59.92.xxx.xxx] but Client says [192.168.1.100]

More Details:

WEB100 Kernel Variables:
Client: localhost/127.0.0.1
AckPktsIn: 368
AckPktsOut: 0
BytesRetrans: 0
CongAvoid: 0
CongestionOverCount: 0
CongestionSignals: 0
CountRTT: 368
CurCwnd: 19040
CurMSS: 1360
CurRTO: 550
CurRwinRcvd: 17680
CurRwinSent: 5840
CurSsthresh: 2147483647
DSACKDups: 0
DataBytesIn: 0
DataBytesOut: 518160
DataPktsIn: 0
DataPktsOut: 381
DupAcksIn: 0
ECNEnabled: 0
FastRetran: 0
MaxCwnd: 19040
MaxMSS: 1360
MaxRTO: 960
MaxRTT: 450
MaxRwinRcvd: 17680
MaxRwinSent: 5840
MaxSsthresh: 0
MinMSS: 1360
MinRTO: 540
MinRTT: 310
MinRwinRcvd: 17680
MinRwinSent: 5840
NagleEnabled: 1
OtherReductions: 0
PktsIn: 368
PktsOut: 381
PktsRetrans: 0
X_Rcvbuf: 107520
RcvWinScale: 7
SACKEnabled: 3
SACKsRcvd: 0
SendStall: 0
SlowStart: 12
SampleRTT: 320
SmoothedRTT: 320
X_Sndbuf: 107520
SndWinScale: 0
SndLimTimeRwin: 9037511
SndLimTimeCwnd: 1004357
SndLimTimeSender: 3041
SndLimTransRwin: 1
SndLimTransCwnd: 1
SndLimTransSender: 1
SndLimBytesRwin: 485520
SndLimBytesCwnd: 32640
SndLimBytesSender: 0
SubsequentTimeouts: 0
SumRTT: 120160
Timeouts: 0
TimestampsEnabled: 0
WinScaleRcvd: 0
WinScaleSent: 7
DupAcksOut: 0
StartTimeUsec: 449422
Duration: 10047083
c2sData: 2
c2sAck: 2
s2cData: 2
s2cAck: 2
half_duplex: 0
link: 100
congestion: 0
bad_cable: 0
mismatch: 0
spd: 0.00
bw: 31.78
loss: 0.000001000
avgrtt: 326.52
waitsec: 0.00
timesec: 10.00
order: 0.0000
rwintime: 0.8997
sendtime: 0.0003
cwndtime: 0.1000
rwin: 0.1349
swin: 0.8203
cwin: 0.1453
rttsec: 0.326522
Sndbuf: 107520
aspd: 0.00000

Checking for mismatch on uplink
(speed > 50 [0>50], (xmitspeed < 5) [0.27<5]
(rwintime > .9) [0.89>.9], (loss < .01) [1.0E<.01]
Checking for excessive errors condition
(loss/sec > .15) [1.0E>.15], (cwndtime > .6) [0.1>.6],
(loss < .01) [1.0E<.01], (MaxSsthresh > 0) [0>0]
Checking for 10 Mbps link
(speed < 9.5) [0<9.5], (speed > 3.0) [0>3.0]
(xmitspeed < 9.5) [0.27<9.5] (loss < .01) [1.0E<.01], (mylink > 0) [3.0>0]
Checking for Wireless link
(sendtime = 0) [3.0E=0], (speed < 5) [0<5]
(Estimate > 50 [31.78>50], (Rwintime > 90) [0.89>.90]
(RwinTrans/CwndTrans = 1) [1/1=1], (mylink > 0) [3.0>0]
Checking for DSL/Cable Modem link
(speed < 2) [0<2], (SndLimTransSender = 0) [1=0]
(SendTime = 0) [3.0E-4=0], (mylink > 0) [3.0>0]
Checking for half-duplex condition
(rwintime > .95) [0.89>.95], (RwinTrans/sec > 30) [0.1>30],
(SenderTrans/sec > 30) [0.1>30], OR (mylink <= 10) [3.0<=10]
Checking for congestion
(cwndtime > .02) [0.1>.02], (mismatch = 0) [0=0]
(MaxSsthresh > 0) [0>0]

estimate = 31.78 based on packet size = 10Kbits, RTT = 326.52msec, and loss = 1.0E-6
The theoretical network limit is 31.78 Mbps
The NDT server has a 105.0 KByte buffer which limits the throughput to 2.51 Mbps
Your PC/Workstation has a 17.0 KByte buffer which limits the throughput to 0.41 Mbps
The network based flow control limits the throughput to 0.44 Mbps

Client Data reports link is 'T1', Client Acks report link is 'T1'
Server Data reports link is 'T1', Server Acks report link is 'T1'

The TCP Optimizer is better than Dr.TCP.

The above test reports shows some unusual results.

Your Send RWIN is also lower than usual. Your MSS is limited by either your router or your ISP.

Use the TCP Optimizer to reset your registry to Windows default setting. Click 'File' and choose the option. Reboot comp to take effect and post a new TCP Analyzer result.

[djdansays]

Thanks a lot. Atleast my download speed has gone up to 742kbps.
Well I tried TCP optimizer and it worked but not fully. My MTU and MSS are still the same. My recieve buffer is small which they say is limiting the speed. Mine is a 2Mbps connection. Could you tell me how to change the Receive buffer? My Receive Window is 65535 so that part is good. I don't know why the Window scaling and Timestamps are off though I turned it ON. These are my test results:

TCP/Web100 Network Diagnostic Tool v5.3.4e
click START to begin
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client to server) . . . . . 240.96Kb/s
running 10s inbound test (server to client) . . . . . . 742.33kb/s
Your PC is connected to a Cable/DSL modem
Information: The receive buffer should be 239778.75 Kbytes to maximize throughput

click START to re-test

Statistics:
WEB100 Enabled Statistics:
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client to server) . . . . . 240.96Kb/s
running 10s inbound test (server to client) . . . . . . 742.33kb/s

------ Client System Details ------
OS data: Name = Windows XP, Architecture = x86, Version = 5.1
Java data: Vendor = Sun Microsystems Inc., Version = 1.5.0_10

------ Web100 Detailed Analysis ------
Cable modem/DSL/T1 link found.
Link set to Full Duplex mode
No network congestion discovered.
Good network cable(s) found
Normal duplex operation found.

Web100 reports the Round trip time = 639.41 msec; the Packet size = 1360 Bytes; and
No packet loss - but packets arrived out-of-order 0.32% of the time
This connection is receiver limited 79.61% of the time.
Increasing the the client's receive buffer (63.0 KB) will improve performance
This connection is network limited 20.36% of the time.

Web100 reports TCP negotiated the optional Performance Settings to:
RFC 2018 Selective Acknowledgment: ON
RFC 896 Nagle Algorithm: ON
RFC 3168 Explicit Congestion Notification: OFF
RFC 1323 Time Stamping: OFF
RFC 1323 Window Scaling: OFF
Information: Network Middlebox is modifying MSS variable
Server IP addresses are preserved End-to-End
Information: Network Address Translation (NAT) box is modifying the Client's IP address
Server says [59.92.183.191] but Client says [192.168.xx.x]

More Details:

WEB100 Kernel Variables:
Client: localhost/127.0.0.1
AckPktsIn: 631
AckPktsOut: 0
BytesRetrans: 0
CongAvoid: 0
CongestionOverCount: 0
CongestionSignals: 0
CountRTT: 629
CurCwnd: 66640
CurMSS: 1360
CurRTO: 970
CurRwinRcvd: 65535
CurRwinSent: 5840
CurSsthresh: 2147483647
DSACKDups: 0
DataBytesIn: 0
DataBytesOut: 923440
DataPktsIn: 0
DataPktsOut: 679
DupAcksIn: 2
ECNEnabled: 0
FastRetran: 0
MaxCwnd: 66640
MaxMSS: 1360
MaxRTO: 1750
MaxRTT: 980
MaxRwinRcvd: 65535
MaxRwinSent: 5840
MaxSsthresh: 0
MinMSS: 1360
MinRTO: 770
MinRTT: 350
MinRwinRcvd: 62815
MinRwinSent: 5840
NagleEnabled: 1
OtherReductions: 0
PktsIn: 631
PktsOut: 679
PktsRetrans: 0
X_Rcvbuf: 107520
RcvWinScale: 7
SACKEnabled: 3
SACKsRcvd: 0
SendStall: 0
SlowStart: 47
SampleRTT: 520
SmoothedRTT: 540
X_Sndbuf: 107520
SndWinScale: 0
SndLimTimeRwin: 8055570
SndLimTimeCwnd: 2060123
SndLimTimeSender: 3015
SndLimTransRwin: 1
SndLimTransCwnd: 1
SndLimTransSender: 1
SndLimBytesRwin: 795600
SndLimBytesCwnd: 127840
SndLimBytesSender: 0
SubsequentTimeouts: 0
SumRTT: 402190
Timeouts: 0
TimestampsEnabled: 0
WinScaleRcvd: 0
WinScaleSent: 7
DupAcksOut: 0
StartTimeUsec: 583715
Duration: 10120617
c2sData: 2
c2sAck: 2
s2cData: 3
s2cAck: 3
half_duplex: 0
link: 100
congestion: 0
bad_cable: 0
mismatch: 0
spd: 0.00
bw: 16.23
loss: 0.000001000
avgrtt: 639.41
waitsec: 0.00
timesec: 10.00
order: 0.0032
rwintime: 0.7961
sendtime: 0.0003
cwndtime: 0.2036
rwin: 0.5000
swin: 0.8203
cwin: 0.5084
rttsec: 0.639412
Sndbuf: 107520
aspd: 0.00000

Checking for mismatch on uplink
(speed > 50 [0>50], (xmitspeed < 5) [0.24<5]
(rwintime > .9) [0.79>.9], (loss < .01) [1.0E<.01]
Checking for excessive errors condition
(loss/sec > .15) [1.0E>.15], (cwndtime > .6) [0.20>.6],
(loss < .01) [1.0E<.01], (MaxSsthresh > 0) [0>0]
Checking for 10 Mbps link
(speed < 9.5) [0<9.5], (speed > 3.0) [0>3.0]
(xmitspeed < 9.5) [0.24<9.5] (loss < .01) [1.0E<.01], (mylink > 0) [3.0>0]
Checking for Wireless link
(sendtime = 0) [3.0E=0], (speed < 5) [0<5]
(Estimate > 50 [16.23>50], (Rwintime > 90) [0.79>.90]
(RwinTrans/CwndTrans = 1) [1/1=1], (mylink > 0) [3.0>0]
Checking for DSL/Cable Modem link
(speed < 2) [0<2], (SndLimTransSender = 0) [1=0]
(SendTime = 0) [3.0E-4=0], (mylink > 0) [3.0>0]
Checking for half-duplex condition
(rwintime > .95) [0.79>.95], (RwinTrans/sec > 30) [0.1>30],
(SenderTrans/sec > 30) [0.1>30], OR (mylink <= 10) [3.0<=10]
Checking for congestion
(cwndtime > .02) [0.20>.02], (mismatch = 0) [0=0]
(MaxSsthresh > 0) [0>0]

estimate = 16.23 based on packet size = 10Kbits, RTT = 639.41msec, and loss = 1.0E-6
The theoretical network limit is 16.23 Mbps
The NDT server has a 105.0 KByte buffer which limits the throughput to 1.28 Mbps
Your PC/Workstation has a 63.0 KByte buffer which limits the throughput to 0.78 Mbps
The network based flow control limits the throughput to 0.79 Mbps

Client Data reports link is 'T1', Client Acks report link is 'T1'
Server Data reports link is 'Ethernet', Server Acks report link is 'Ethernet'

[trogers]

Window Scaling will be turned on only when RWIN > 65535. In Windows default setting RWIN is only 65535. Timestamp should be turned off to reduce packet overheads.

Use the following with TCP Optimizer:

General Settings tab:
Custom settings - check
Modify All Network Adapters - check
network adapter selection - your NIC
MTU - 1400
TTL - 64
TCP Receive Window - 130560
MTU Discovery - Yes
Black Hole Detect - No
Selective Acks - Yes
Max Duplicate ACKs - 2
TCP 1323 Options:
Windows Scaling - checked
Timestamps - uncheck

Advanced Settings tab:
Max Connections per Server - 10
Max Connections per 1.0 Server - 20
LocalPriority - 1
Host Priority - 1
DNSPriority - 1
NetbtPriority - 1
Lan Browsing speedup - optimized
QoS: NonBestEffortLimit - 0
ToS: DisableUserTOSSetting - 0
ToS: DefaultTOSValue - 136
MaxNegativeCacheTtl - 0
NetFailureCacheTime - 0
NegativeSOACache Time - 0
LAN Request Buffer Size - 32768
Then select "Apply Changes" and reboot to take effect

Test your speed at this link using the recommended test server:

www.speedtest.net

[djdansays]

These are my new values. But what ever I do MTU is not changing. DSL reports say that some software of router is limiting my MTU. I checked my Router but it has 1492 as MTU but after the test it says it is just 1400. Which software could do this? What do they mean when they say that my receive buffer should be 709383.75 Kbytes? And mine is 272Kbytes. How do I change them?
Test results:
TCP/Web100 Network Diagnostic Tool v5.3.4e
click START to begin
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client to server) . . . . . 276.28Kb/s
running 10s inbound test (server to client) . . . . . . 830.12kb/s
Your PC is connected to a Cable/DSL modem
Information: The receive buffer should be 709383.75 Kbytes to maximize throughput

click START to re-test

Statistics:
WEB100 Enabled Statistics:
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client to server) . . . . . 276.28Kb/s
running 10s inbound test (server to client) . . . . . . 830.12kb/s

------ Client System Details ------
OS data: Name = Windows XP, Architecture = x86, Version = 5.1
Java data: Vendor = Sun Microsystems Inc., Version = 1.5.0_10

------ Web100 Detailed Analysis ------
Cable modem/DSL/T1 link found.
Link set to Full Duplex mode
No network congestion discovered.
Good network cable(s) found
Normal duplex operation found.

Web100 reports the Round trip time = 1891.69 msec; the Packet size = 1360 Bytes; and
No packet loss - but packets arrived out-of-order 0.18% of the time
This connection is receiver limited 43.23% of the time.
Increasing the the client's receive buffer (272.0 KB) will improve performance
This connection is network limited 56.74% of the time.

Web100 reports TCP negotiated the optional Performance Settings to:
RFC 2018 Selective Acknowledgment: ON
RFC 896 Nagle Algorithm: ON
RFC 3168 Explicit Congestion Notification: OFF
RFC 1323 Time Stamping: OFF
RFC 1323 Window Scaling: ON
Information: Network Middlebox is modifying MSS variable
Server IP addresses are preserved End-to-End
Information: Network Address Translation (NAT) box is modifying the Client's IP address
Server says [59.92.193.215] but Client says [192.168.xx.xx]

More details:
WEB100 Kernel Variables:
Client: localhost/127.0.0.1
AckPktsIn: 551
AckPktsOut: 0
BytesRetrans: 0
CongAvoid: 0
CongestionOverCount: 0
CongestionSignals: 0
CountRTT: 551
CurCwnd: 278800
CurMSS: 1360
CurRTO: 3290
CurRwinRcvd: 278784
CurRwinSent: 5840
CurSsthresh: 2147483647
DSACKDups: 0
DataBytesIn: 0
DataBytesOut: 1028160
DataPktsIn: 0
DataPktsOut: 756
DupAcksIn: 1
ECNEnabled: 0
FastRetran: 0
MaxCwnd: 278800
MaxMSS: 1360
MaxRTO: 3400
MaxRTT: 2620
MaxRwinRcvd: 278784
MaxRwinSent: 5840
MaxSsthresh: 0
MinMSS: 1360
MinRTO: 1060
MinRTT: 460
MinRwinRcvd: 34848
MinRwinSent: 5840
NagleEnabled: 1
OtherReductions: 0
PktsIn: 553
PktsOut: 757
PktsRetrans: 0
X_Rcvbuf: 107520
RcvWinScale: 7
SACKEnabled: 3
SACKsRcvd: 0
SendStall: 0
SlowStart: 203
SampleRTT: 2460
SmoothedRTT: 2500
X_Sndbuf: 107520
SndWinScale: 3
SndLimTimeRwin: 4328600
SndLimTimeCwnd: 5682088
SndLimTimeSender: 3396
SndLimTransRwin: 1
SndLimTransCwnd: 1
SndLimTransSender: 1
SndLimBytesRwin: 477360
SndLimBytesCwnd: 552160
SndLimBytesSender: 0
SubsequentTimeouts: 0
SumRTT: 1042320
Timeouts: 0
TimestampsEnabled: 0
WinScaleRcvd: 3
WinScaleSent: 7
DupAcksOut: 0
StartTimeUsec: 735275
Duration: 10013198
c2sData: 2
c2sAck: 2
s2cData: 3
s2cAck: 3
half_duplex: 0
link: 100
congestion: 0
bad_cable: 0
mismatch: 0
spd: 0.00
bw: 5.49
loss: 0.000001000
avgrtt: 1891.69
waitsec: 0.00
timesec: 10.00
order: 0.0018
rwintime: 0.4323
sendtime: 0.0003
cwndtime: 0.5674
rwin: 2.1270
swin: 64.0000
cwin: 2.1271
rttsec: 1.891688
Sndbuf: 8388608
aspd: 0.00000

Checking for mismatch on uplink
(speed > 50 [0>50], (xmitspeed < 5) [0.27<5]
(rwintime > .9) [0.43>.9], (loss < .01) [1.0E<.01]
Checking for excessive errors condition
(loss/sec > .15) [1.0E>.15], (cwndtime > .6) [0.56>.6],
(loss < .01) [1.0E<.01], (MaxSsthresh > 0) [0>0]
Checking for 10 Mbps link
(speed < 9.5) [0<9.5], (speed > 3.0) [0>3.0]
(xmitspeed < 9.5) [0.27<9.5] (loss < .01) [1.0E<.01], (mylink > 0) [3.0>0]
Checking for Wireless link
(sendtime = 0) [3.0E=0], (speed < 5) [0<5]
(Estimate > 50 [5.49>50], (Rwintime > 90) [0.43>.90]
(RwinTrans/CwndTrans = 1) [1/1=1], (mylink > 0) [3.0>0]
Checking for DSL/Cable Modem link
(speed < 2) [0<2], (SndLimTransSender = 0) [1=0]
(SendTime = 0) [3.0E-4=0], (mylink > 0) [3.0>0]
Checking for half-duplex condition
(rwintime > .95) [0.43>.95], (RwinTrans/sec > 30) [0.1>30],
(SenderTrans/sec > 30) [0.1>30], OR (mylink <= 10) [3.0<=10]
Checking for congestion
(cwndtime > .02) [0.56>.02], (mismatch = 0) [0=0]
(MaxSsthresh > 0) [0>0]

estimate = 5.49 based on packet size = 10Kbits, RTT = 1891.69msec, and loss = 1.0E-6
The theoretical network limit is 5.49 Mbps
The NDT server has a 8192.0 KByte buffer which limits the throughput to 33.83 Mbps
Your PC/Workstation has a 272.0 KByte buffer which limits the throughput to 1.12 Mbps
The network based flow control limits the throughput to 1.12 Mbps

Client Data reports link is 'T1', Client Acks report link is 'T1'
Server Data reports link is 'Ethernet', Server Acks report link is 'Ethernet'

[trogers]

Your signal round trip time is too high at 1892ms. Increasing buffer will only increase the time much more.

Do a tracert to www.yahoo.com and post. We can check if there is problem with your signal quality.

Your ISP may be limiting MTU to 1400.

[djdansays]

I don't think it is the ISP who is limiting because one of my friend who has the same connection (BSNL-2Mbps) has an MTU of 1456 and another person in this forum has 1480. But my friend also had the problem of Network Middlebox modifying the MSS variable.
Increasing the buffer certainly increased the round trip time but also increased the download speed. So how should I make a trade-off between them.
Anyway these are the results

Date Inc. URL Average time [sec] Action
2007.1.15 17:29 Internal parts are included www.yahoo.com 1.0 sec RE execute this measurement Details
2007.1.15 17:35 Internal parts are included www.yahoo.com 2.0 sec RE execute this measurement Details
2007.1.15 17:36 Internal parts are included www.yahoo.com 1.0 sec RE execute this measurement Details
2007.1.15 17:36 Internal parts are included www.yahoo.com 1.0 sec RE execute this measurement Details

[trogers]

High round trip time is usually cause by problem in signal device or a bad connection line. A tracert may show where high ping times are occurring.

To do a tracert, click 'Start' and then 'Run'. Type "cmd" into the box and click 'ok'.

A DOS black screen will appear. Type after the C:\>

tracert www.yahoo.com

and press enter key

When test is completed, move mouse cusor to the DOS black screen, click right and choose 'select all'.

Move mouse cursor to the Quick Reply box of this forum, click right and 'paste'.

[djdansays]

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Danny John>cd\

C:\>tracert www.yahoo.com

Tracing route to www.yahoo-ht2.akadns.net [69.147.114.210]
over a maximum of 30 hops:

1 * * * Request timed out.
2 36 ms 34 ms 55 ms 59.92.128.1
3 * * * Request timed out.
4 63 ms 62 ms 76 ms 218.248.255.9
5 61 ms 61 ms 62 ms 218.248.255.22
6 320 ms 310 ms 321 ms 202.54.185.250
7 544 ms 551 ms 552 ms 59.163.16.146.static.vsnl.net.in [59.163.16.146]

8 586 ms 589 ms 582 ms 219.64.229.1.mpls-vpn-ny.static.vsnl.net.in [219
.64.229.1]
9 564 ms 575 ms 544 ms ge-0-0-9.p815.pat2.dce.yahoo.com [216.115.98.109
]
10 * * * Request timed out.
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out.
21 * * * Request timed out.
22 * * * Request timed out.
23 * * * Request timed out.
24 * * * Request timed out.
25 * * * Request timed out.
26 * * * Request timed out.
27 * * * Request timed out.
28 * * * Request timed out.
29 * * * Request timed out.
30 * * * Request timed out.

Trace complete.

C:\>tracert www.yahoo.com

Tracing route to www.yahoo-ht2.akadns.net [69.147.114.210]
over a maximum of 30 hops:

1 * * * Request timed out.
2 35 ms 35 ms 69 ms 59.92.128.1
3 * * * Request timed out.
4 63 ms 66 ms 62 ms 218.248.255.9
5 67 ms 62 ms 62 ms 218.248.255.22
6 248 ms 238 ms 237 ms 202.54.185.250
7 476 ms 481 ms 474 ms 59.163.16.146.static.vsnl.net.in [59.163.16.146]

8 474 ms 477 ms 520 ms 219.64.229.1.mpls-vpn-ny.static.vsnl.net.in [219
.64.229.1]
9 454 ms 490 ms 466 ms ge-2-0-9.p559.pat2.dce.yahoo.com [216.115.97.19]

10 * * * Request timed out.
11 * * * Request timed out.
12 * * * Request timed out.
13 * * * Request timed out.
14 * * * Request timed out.
15 * * * Request timed out.
16 * * * Request timed out.
17 * * * Request timed out.
18 * * * Request timed out.
19 * * * Request timed out.
20 * * * Request timed out.
21 * * * Request timed out.
22 * * * Request timed out.
23 * * * Request timed out.
24 * * * Request timed out.
25 * * * Request timed out.
26 * * * Request timed out.
27 * * * Request timed out.
28 * * * Request timed out.
29 * * * Request timed out.
30 * * * Request timed out.

Trace complete.

C:\>

[trogers]

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Danny John>cd\

C:\>tracert www.yahoo.com

Tracing route to www.yahoo-ht2.akadns.net [69.147.114.210]
over a maximum of 30 hops:

1 * * * Request timed out.
2 36 ms 34 ms 55 ms 59.92.xxx.xxx
3 * * * Request timed out.
4 63 ms 62 ms 76 ms 218.248.255.9
5 61 ms 61 ms 62 ms 218.248.255.22

Tracing route to www.yahoo-ht2.akadns.net [69.147.114.210]
over a maximum of 30 hops:

1 * * * Request timed out.
2 35 ms 35 ms 69 ms 59.92.128.1
3 * * * Request timed out.
4 63 ms 66 ms 62 ms 218.248.255.9
5 67 ms 62 ms 62 ms 218.248.255.22

Are you using a router?

[djdansays]

Yes I am using a modem/router.
It is Quidway WA1003A series from Huawei.

[trogers]

Yes I am using a modem/router.
It is Quidway WA1003A series from Huawei.

This is a wireless router. I suspect signal interference is causing the timed out in hop 1. Connect your comp to the router by a cable and do your tracert to confirm. If tracert shws no interference, do some speedtests.

[djdansays]

Well I am sorry I could not connect to the router using a cable because when I tried doing that it said that it is not windows XP tested and do I want to take a risk and install it. Then when I took the risk the installation failed. So I can never connect to the net using USB or Ethernet. Only Wireless works fine.

[trogers]

Well I am sorry I could not connect to the router using a cable because when I tried doing that it said that it is not windows XP tested and do I want to take a risk and install it. Then when I took the risk the installation failed. So I can never connect to the net using USB or Ethernet. Only Wireless works fine.

Does that mean that you access web admin of your router only through wireless and make changes?

[djdansays]

Yes I only use wireless.
I have ZoneAlarm as my Firewall. Is this the one which is limiting my MTU to 1400?

[djdansays]

Thanks a lot Trogers. I got rid of the problem. The TCP/IP setting was not set properly. I just followed the instructions in the the topic titled "Tips on Tweaking-Please read". Finally I got out of it. I hope all those who cannot change their MTU values could be facing this problem. So I suggest all of you to go through it and make necessary changes. Thanks again Trogers and Speedguide.net
Thanks a lot