ndt-users list created

[Larry Vaden <>]

Hello fellow ndt-users,

This customer is connected to a Cisco 7206 with an upstream
fiber-based DS3 connection.

How do we go about finding the "10 Mbps Ethernet" short of visiting
each of the rural pops in the path and running NDT from said pops?

kind regards/ldv

Larry Vaden, CoFounder
Internet Texoma, Inc.
Serving Rural Texomaland Since 1995
We Care About Your Connection!


Cisco 7206
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HQ MikroTik distribution router
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wireless backbone link
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DD MikroTik distribution router
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wireless backbone link
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PW MikroTik distribution router
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MikroTik 802.11b/g Access Point
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Client radio (Ubiquiti NanoBridge M2)
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Client Network
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Client PC

Checking for Middleboxes . . . . . . . . . . . . . . . . . .  Done
checking for firewalls . . . . . . . . . . . . . . . . . . .  Done
running 10s outbound test (client-to-server [C2S]) . . . . . 1.09Mb/s
running 10s inbound test (server-to-client [S2C]) . . . . . . 7.99Mb/s
The slowest link in the end-to-end path is a 10 Mbps Ethernet subnet
 [S2C]: Packet queuing detected


WEB100 Enabled Statistics:
Checking for Middleboxes . . . . . . . . . . . . . . . . . .  Done
checking for firewalls . . . . . . . . . . . . . . . . . . .  Done
running 10s outbound test (client-to-server [C2S]) . . . . . 1.09Mb/s
running 10s inbound test (server-to-client [S2C]) . . . . . . 7.99Mb/s

       ------  Client System Details  ------
OS data: Name = Windows XP, Architecture = x86, Version = 5.1
Java data: Vendor = Sun Microsystems Inc., Version = 1.5.0_04

       ------  Web100 Detailed Analysis  ------
10 Mbps Ethernet 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 = 240.01 msec; the Packet size = 1460
Bytes; and
No packet loss - but packets arrived out-of-order 0.08% of the time
S2C throughput test: Packet queuing detected: 50.56%
This connection is receiver limited 40.93% of the time.
This connection is sender limited 52.17% of the time.
This connection is network limited 6.9% 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

Server 'ndt.anl.gov' is probably behind a firewall. [Connection to the
ephemeral port failed]
Client is probably behind a firewall. [Connection to the ephemeral port 
failed]
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 [aaa.bbb.126.34] but Client says [192.168.1.101]


WEB100 Kernel Variables:
Client: localhost/127.0.0.1
CurMSS: 1460
X_Rcvbuf: 16777216
X_Sndbuf: 16777216
AckPktsIn: 3759
AckPktsOut: 0
BytesRetrans: 0
CongAvoid: 0
CongestionOverCount: 0
CongestionSignals: 0
CountRTT: 3756
CurCwnd: 327040
CurRTO: 452
CurRwinRcvd: 262144
CurRwinSent: 5888
CurSsthresh: -616
DSACKDups: 0
DataBytesIn: 0
DataBytesOut: 11248720
DataPktsIn: 0
DataPktsOut: 7678
DupAcksIn: 3
ECNEnabled: 0
FastRetran: 0
MaxCwnd: 327040
MaxMSS: 1460
MaxRTO: 868
MaxRTT: 488
MaxRwinRcvd: 262144
MaxRwinSent: 5888
MaxSsthresh: 0
MinMSS: 1460
MinRTO: 264
MinRTT: 64
MinRwinRcvd: 262144
MinRwinSent: 5840
NagleEnabled: 1
OtherReductions: 3
PktsIn: 3759
PktsOut: 7678
PktsRetrans: 0
RcvWinScale: 8
SACKEnabled: 3
SACKsRcvd: 0
SendStall: 0
SlowStart: 0
SampleRTT: 232
SmoothedRTT: 228
SndWinScale: 3
SndLimTimeRwin: 4590486
SndLimTimeCwnd: 773620
SndLimTimeSender: 5850347
SndLimTransRwin: 1786
SndLimTransCwnd: 81
SndLimTransSender: 1867
SndLimBytesRwin: 10372540
SndLimBytesCwnd: 731760
SndLimBytesSender: 144420
SubsequentTimeouts: 0
SumRTT: 901464
Timeouts: 0
TimestampsEnabled: 0
WinScaleRcvd: 3
WinScaleSent: 8
DupAcksOut: 0
StartTimeUsec: 707808
Duration: 11216397
c2sData: 3
c2sAck: 3
s2cData: 4
s2cAck: 3
half_duplex: 0
link: 10
congestion: 0
bad_cable: 0
mismatch: 0
spd: 8.02
bw: 46.41
loss: 0.000001000
avgrtt: 240.01
waitsec: 0.00
timesec: 11.00
order: 0.0008
rwintime: 0.4093
sendtime: 0.5217
cwndtime: 0.0690
rwin: 2.0000
swin: 128.0000
cwin: 2.4951
rttsec: 0.240006
Sndbuf: 16777216
aspd: 0.00000
CWND-Limited: 325.54
minCWNDpeak: 265720
maxCWNDpeak: 327040
CWNDpeaks: 3

The theoretical network limit is 46.41 Mbps
The NDT server has a 8192.0 KByte buffer which limits the throughput to
533.32 Mbps
Your PC/Workstation has a 256.0 KByte buffer which limits the throughput to
8.33 Mbps
The network based flow control limits the throughput to 10.39 Mbps

Client Data reports link is 'Ethernet', Client Acks report link is 'Ethernet'
Server Data reports link is 'T3', Server Acks report link is 'Ethernet'