n00b help please

[Dakotakid44]

I just need a little help tweaking my cable modem. I'm running Windows XP.
These are the results I got from the TCP/IP analyzer:
TCP options string = 020405ac0103030101010402
MTU = 1492
MTU is optimized for PPoE DSL broadband. If not, consider raising MTU to 1500 for optimal throughput.
MSS = 1452
MSS is optimized for PPPoE DSL broadband. If not, consider raising your MTU value.
Default TCP Receive Window (RWIN) = 129228
RWIN Scaling (RFC1323) = 1 bits (scale factor of 2)
Unscaled TCP Receive Window = 64614

RWIN is a multiple of MSS
Other RWIN values that might work well with your current MTU/MSS:
511104 (MSS x 44 * scale factor of 8)
255552 (MSS x 44 * scale factor of 4)
127776 (MSS x 44 * scale factor of 2)
63888 (MSS x 44)
bandwidth * delay product (Note this is not a speed test):

Your TCP Window limits you to: 5169.12 kbps (646.14 KBytes/s) @ 200ms
Your TCP Window limits you to: 2067.648 kbps (258.456 KBytes/s) @ 500ms
MTU Discovery (RFC1191) = ON
Time to live left = 118 hops
TTL value is ok.
Timestamps (RFC1323) = OFF
Selective Acknowledgements (RFC2018) = ON
IP type of service field (RFC1349) = 00000000 (0)


I hope this is enough info. If not let me know. Thanks

[trogers]

Is your ISP giving you ADSL or Cable? What is your subscribed speed? Which country are you in?

[Dakotakid44]

its cable, i think it's 3-5 mb/sec., USA

[trogers]

Do the test in this link and post your results under the Statistics' button:

http://nitro.ucsc.edu/

[Dakotakid44]

Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client to server) . . . . . 247.50Kb/s
running 10s inbound test (server to client) . . . . . . 764.88kb/s
Your PC is connected to a Cable/DSL modem
Information: Other network traffic is congesting the link

click START to re-test

[trogers]

This is just the Summary. After finishing the test, click the 'Statistics' button and a report will pop up. Copy and post the report.

[Dakotakid44]

WEB100 Enabled Statistics:
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client to server) . . . . . 218.38Kb/s
running 10s inbound test (server to client) . . . . . . 751.37kb/s

------ Client System Details ------
OS data: Name = Windows XP, Architecture = x86, Version = 5.1
Java data: Vendor = Sun Microsystems Inc., Version = 1.5.0_03

------ Web100 Detailed Analysis ------
Cable modem/DSL/T1 link found.
Link set to Full Duplex mode
Information: throughput is limited by other network traffic.
Good network cable(s) found
Normal duplex operation found.

Web100 reports the Round trip time = 98.46 msec; the Packet size = 1452 Bytes; and
There were 25 packets retransmitted, 128 duplicate acks received, and 146 SACK blocks received
The connection was idle 0 seconds (0%) of the time
This connection is network limited 99.97% of the time.
Excessive packet loss is impacting your performance, check the auto-negotiate function on your local PC and network switch

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
Client IP addresses are preserved End-to-End

[trogers]

Use the TCP Optimizer with these custom settings and then do the TCP Analyzer again and post:

General Settings tab:
Custom settings - check
Modify All Network Adapters - check
network adapter selection - your NIC
MTU - 1500
TTL - 64
TCP Receive Window - leave this blank
MTU Discovery - Yes
Black Hole Detect - No
Selective Acks - Yes
Max Duplicate ACKs - 2
TCP 1323 Options:
Windows Scaling - uncheck
Timestamps - uncheck
Advanced Settings tab:
Max Connections per Server - 10
Max Connections per 1.0 Server - 20
LocalPriority - 5
Host Priority - 6
DNSPriority - 7
NetbtPriority - 8
Lan Browsing speedup - optimized
QoS: NonBestEffortLimit - 0
ToS: DisableUserTOSSetting - 0
ToS: DefaultTOSValue - 80
MaxNegativeCacheTtl - 0
NetFailureCacheTime - 0
NegativeSOACache Time - 0
LAN Request Buffer Size - 32768
Then select "Apply Changes" and reboot to take effect

[Dakotakid44]

thank you very much trogers

[trogers]

Your comp has not yet been optimized. What I am trying to do is to see if your MTU can be made to 1500 for Cable.

Use the custom setting, reboot comp, do the TCP Analyzer and post the results.

[Dakotakid44]

after optimizing:


WEB100 Enabled Statistics:
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client to server) . . . . . 246.71Kb/s
running 10s inbound test (server to client) . . . . . . 844.88kb/s

------ Client System Details ------
OS data: Name = Windows XP, Architecture = x86, Version = 5.1
Java data: Vendor = Sun Microsystems Inc., Version = 1.5.0_03

------ Web100 Detailed Analysis ------
Cable modem/DSL/T1 link found.
Link set to Full Duplex mode
Information: throughput is limited by other network traffic.
Good network cable(s) found
Normal duplex operation found.

Web100 reports the Round trip time = 95.8 msec; the Packet size = 1460 Bytes; and
There were 17 packets retransmitted, 82 duplicate acks received, and 93 SACK blocks received
The connection was idle 0 seconds (0%) of the time
This connection is network limited 99.97% of the time.
Excessive packet loss is impacting your performance, check the auto-negotiate function on your local PC and network switch

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
Packet size is preserved End-to-End
Server IP addresses are preserved End-to-End
Client IP addresses are preserved End-to-End

[trogers]

Use the TCP Optimizer with these custom settings for optimizing:

General Settings tab:
Custom settings - check
Modify All Network Adapters - check
network adapter selection - your NIC
MTU - 1500
TTL - 64
TCP Receive Window - 128480
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 - 5
Host Priority - 6
DNSPriority - 7
NetbtPriority - 8
Lan Browsing speedup - optimized
QoS: NonBestEffortLimit - 0
ToS: DisableUserTOSSetting - 0
ToS: DefaultTOSValue - 80
MaxNegativeCacheTtl - 0
NetFailureCacheTime - 0
NegativeSOACache Time - 0
LAN Request Buffer Size - 32768
Then select "Apply Changes" and reboot to take effect

Make sure your modem is not placed near to any electrical device, eg. speakers, cordless phone, router, etc.

[Dakotakid44]

i have to go. i'll be back later. thanks.

[Dakotakid44]

after new optimizing:


WEB100 Enabled Statistics:
Checking for Middleboxes . . . . . . . . . . . . . . . . . . Done
running 10s outbound test (client to server) . . . . . 248.24Kb/s
running 10s inbound test (server to client) . . . . . . 2.63Mb/s

------ Client System Details ------
OS data: Name = Windows XP, Architecture = x86, Version = 5.1
Java data: Vendor = Sun Microsystems Inc., Version = 1.5.0_03

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

Web100 reports the Round trip time = 102.34 msec; the Packet size = 1460 Bytes; and
There were 13 packets retransmitted, 231 duplicate acks received, and 240 SACK blocks received
The connection was idle 0 seconds (0%) of the time
This connection is receiver limited 8.52% of the time.
This connection is network limited 91.45% 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
Packet size is preserved End-to-End
Server IP addresses are preserved End-to-End
Client IP addresses are preserved End-to-End

.thanks again

[trogers]

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



I think your NIC is either faulty or has a wrong setting. Your first 2 network tests showed Link set to Full Duplex but this last test shows Link set to Half Duplex.

Go to Control Panel=>System=>Hardware=>Device Manager

Click right on Network Adapter and select 'Properties'

In the pop up menu, check your setting for 'Speed & Duplex'

Setting should either be autosensing or 10 mbps full duplex.

[Dakotakid44]

it says "autodetect"

[trogers]

Download this test file and check your file transfer speed after 50% has been downloaded:

ftp://ftp1.optonline.net/pub/test64

[Dakotakid44]

it was about 975 KB/sec.