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therockscott

half-duplex

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This is my first post on this site. I absolutely have become addicted to this site. I'm using an old computer as an FTP server. It's a Compaq PIII 700mhz with the adapter being integrated into the motherboard. It's worked fine but I've been reading about the half and full duplex modes. Mine was in auto-detect. I ran docsdiag and it said that I was at half-duplex. I went to properties and changed it to full, rebooted and ran docsdiag again and it still said half-duplex. My adapter is an Intel Pro/100 VM. I went on Intel's website to see if this adapter only supported half-duplex but didn't get any info. So do I need to get another adapter to make my tweaks faster? I'm also behind a Belkin router and I'm using RR with 5000/384. Thanks in advance.

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docsdiag is a diagnostic tool that reads information from the modem and it says that i'm still running in half-duplex even when i've changed it to full and did a reboot. I didn't notice very much change but I'm not sure if the network adapter is capable of being changed to full duplex since it's on an older computer and integrated into the motherboard.

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here's the info :

TCP/Web100 Network Diagnostic Tool v5.3.3d

click START to begin

Another client is currently being served, your test will begin within 90 seconds

Another client is currently being served, your test will begin within 45 seconds

Checking for Middleboxes . . . . . . . . . . . . . . . . . .  Done

running 10s outbound test (client to server) . . . . . 412.21Kb/s

running 10s inbound test (server to client) . . . . . . 3.28Mb/s

Your PC is connected to a Cable/DSL modem

Information: Other network traffic is congesting the link

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more info:

WEB100 Kernel Variables:

Client: localhost/127.0.0.1

AckPktsIn: 1552

AckPktsOut: 0

BytesRetrans: 40880

CongAvoid: 1028

CongestionOverCount: 0

CongestionSignals: 3

CountRTT: 1225

CurCwnd: 42340

CurMSS: 1460

CurRTO: 290

CurRwinRcvd: 687104

CurRwinSent: 5840

CurSsthresh: 30660

DSACKDups: 0

DataBytesIn: 0

DataBytesOut: 4152240

DataPktsIn: 0

DataPktsOut: 2844

DupAcksIn: 303

ECNEnabled: 0

FastRetran: 3

MaxCwnd: 166440

MaxMSS: 1460

MaxRTO: 420

MaxRTT: 260

MaxRwinRcvd: 687104

MaxRwinSent: 5840

MaxSsthresh: 83220

MinMSS: 1460

MinRTO: 280

MinRTT: 80

MinRwinRcvd: 42944

MinRwinSent: 5840

NagleEnabled: 1

OtherReductions: 1

PktsIn: 1552

PktsOut: 2844

PktsRetrans: 28

X_Rcvbuf: 103424

RcvWinScale: 7

SACKEnabled: 3

SACKsRcvd: 347

SendStall: 0

SlowStart: 174

SampleRTT: 90

SmoothedRTT: 90

X_Sndbuf: 103424

SndWinScale: 4

SndLimTimeRwin: 0

SndLimTimeCwnd: 10095596

SndLimTimeSender: 2591

SndLimTransRwin: 0

SndLimTransCwnd: 1

SndLimTransSender: 1

SndLimBytesRwin: 0

SndLimBytesCwnd: 4152240

SndLimBytesSender: 0

SubsequentTimeouts: 0

SumRTT: 143500

Timeouts: 0

TimestampsEnabled: 0

WinScaleRcvd: 4

WinScaleSent: 7

DupAcksOut: 0

StartTimeUsec: 349071

Duration: 10101485

c2sData: 2

c2sAck: 2

s2cData: 9

s2cAck: 3

half_duplex: 1

link: 0

congestion: 1

bad_cable: 0

mismatch: 0

spd: 0.00

bw: 2.93

loss: 0.001054852

avgrtt: 117.14

waitsec: 0.00

timesec: 10.00

order: 0.1952

rwintime: 0.0000

sendtime: 0.0003

cwndtime: 0.9997

rwin: 5.2422

swin: 64.0000

cwin: 1.2698

rttsec: 0.117143

Sndbuf: 8388608

aspd: 9.71805

Checking for mismatch on uplink

(speed > 50 [0>50], (xmitspeed < 5) [0.41<5]

(rwintime > .9) [0>.9], (loss < .01) [0.00<.01]

Checking for excessive errors condition

(loss/sec > .15) [1.05>.15], (cwndtime > .6) [0.99>.6],

(loss < .01) [0.00<.01], (MaxSsthresh > 0) [83220>0]

Checking for 10 Mbps link

(speed < 9.5) [0<9.5], (speed > 3.0) [0>3.0]

(xmitspeed < 9.5) [0.41<9.5] (loss < .01) [0.00<.01], (mylink > 0) [3.0>0]

Checking for Wireless link

(sendtime = 0) [3.0E=0], (speed < 5) [0<5]

(Estimate > 50 [2.93>50], (Rwintime > 90) [0>.90]

(RwinTrans/CwndTrans = 1) [0/1=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>.95], (RwinTrans/sec > 30) [0>30],

(SenderTrans/sec > 30) [0.1>30], OR (mylink <= 10) [3.0<=10]

Checking for congestion

(cwndtime > .02) [0.99>.02], (mismatch = 0) [0=0]

(MaxSsthresh > 0) [83220>0]

estimate = 2.93 based on packet size = 11Kbits, RTT = 117.14msec, and loss = 0.001054852

The theoretical network limit is 2.93 Mbps

The NDT server has a 8192.0 KByte buffer which limits the throughput to 546.34 Mbps

Your PC/Workstation has a 671.0 KByte buffer which limits the throughput to 44.75 Mbps

The network based flow control limits the throughput to 10.83 Mbps

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

Server Data reports link is '10 Gig', Server Acks report link is 'Ethernet'

stats:

WEB100 Enabled Statistics:

Checking for Middleboxes . . . . . . . . . . . . . . . . . .  Done

running 10s outbound test (client to server) . . . . . 412.21Kb/s

running 10s inbound test (server to client) . . . . . . 3.28Mb/s

------  Client System Details  ------

OS data: Name = Windows XP, Architecture = x86, Version = 5.1

Java data: Vendor = Sun Microsystems Inc., Version = 1.5.0_01

------  Web100 Detailed Analysis  ------

Cable modem/DSL/T1 link found.

Link set to Half 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 = 117.14 msec; the Packet size = 1460 Bytes; and

There were 28 packets retransmitted, 303 duplicate acks received, and 347 SACK blocks received

The connection was idle 0 seconds (0%) of the time

This connection is network limited 99.97% 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

Information: Network Address Translation (NAT) box is modifying the Client's IP address

Server says [65.33.114.140] but Client says [192.168.2.3]

TCP/Web100 Network Diagnostic Tool v5.3.3d

click START to begin

Another client is currently being served, your test will begin within 90 seconds

Another client is currently being served, your test will begin within 45 seconds

Checking for Middleboxes . . . . . . . . . . . . . . . . . .  Done

running 10s outbound test (client to server) . . . . . 412.21Kb/s

running 10s inbound test (server to client) . . . . . . 3.28Mb/s

Your PC is connected to a Cable/DSL modem

Information: Other network traffic is congesting the link

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That also says half duplex.

Is that server querying therockscotts pc or something in between?

im not 100% sure how that test check duplex mode, but i think it can find Duplex Mismatches

as far as i know all Cablemodem connections is half duplex, but if your using a router you can use full duplex inside your LAN, and the WAN port from your modem will probl operate in half duplex to the modem

VanBuren :)

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SO THERE WILL BE ABSOLUTELY NO WAY OFF SETTING IT UP IN FULL DUPLEX MODE FROM INCOMING TRAFFIC? IF SO, THEN THAT KINDA SUCKS.  :evil: WHEN I'M ON MY LAN, TRANSFERRING TO COMPUTERS, IT ROCKS. SO MAYBE I CAN CALL THE CABLE COMPANY AND SEE IF THERE'S ANYTHING THAT I CAN DO? ANY SUGGESTIONS ARE WELCOME. AND THANKS AGAIN VAN BUREN. :D I'M USING YOUR LATEST CCS SETTINGS. PROBABLY WOULD GO ALOT FASTER IN FULL MODE THOUGH.

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