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Regarding Wrong bottleneck link


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  • From: om prakash singh <>
  • To:
  • Subject: Regarding Wrong bottleneck link
  • Date: Fri, 4 Dec 2015 06:14:37 +0000 (UTC)

Hi ,

I have updated NDT to 3.7.0.2 then i run the bandwidth test , my link is 100
Mbps then its show my show blttlencek link is 100Mbps. But when i test with
1G link machine then its shows wrong bottleneck link
. it shows 10G thta is wrong. please help me regarding this issue


Thanks

Here is output when client machine link is 100Mbps

Your test results
Summary Details Advanced
Upload speed

85.62 Mb/s
Download speed

91.87 Mb/s

Network latency: 7 msec round trip time

Jitter: 44 msec
More information about NDT
More information about Measurement Lab


Your test results
Summary Details Advanced
Your system: Windows 8.1 6.3
Plugin version: 1.8.0_66 (x86)

TCP receive window: 87552 current, 383744 maximum
0.00 % of packets lost during test
Round trip time: 1 msec (minimum), 45 msec (maximum), 7 msec (average)
Jitter: -
0 seconds spend waiting following a timeout
TCP time-out counter: 206
59 selective acknowledgement packets received

No duplex mismatch condition was detected.
The test did not detect a cable fault.
No network congestion was detected.

0.0025 % of the time was not spent in a receiver limited or sender limited
state.
0.0 % of the time the connection is limited by the client machine's receive
buffer.
Optimal receive buffer: 392953856 bytes
Bottleneck link: 100 Mbps Ethernet
49 duplicate ACKs set

Your test results
Summary Details Advanced
Web100 Kernel Variables:
Client: WWORKSTATION34/192.168.219.1
The theoretical network limit is 424.32 Mbps
The NDT server has a 512.0 KByte buffer which limits the throughput to 1085.89
Mbps
Your PC/Workstation has a 374.0 KByte buffer which limits the throughput to
397.08 Mbps
The network based flow control limits the throughput to 400.35 Mbps

Client Data reports link is 'FastE', Client Acks report link is 'FastE'
Server Data reports link is '10 Gig', Server Acks report link is 'FastE'

=== Results sent by the server ===



Here is output when client machine link is 1G ( it shows wrong bolltlncek
link)



Your test results
Summary Details Advanced
Upload speed

671.81 Mb/s
Download speed

596.11 Mb/s

Network latency: 7 msec round trip time

Jitter: 140 msec
More information about NDT
More information about Measurement Lab
Test again

**************************************

Your system: Windows 8.1 6.3
Plugin version: 1.8.0_65 (x86)

TCP receive window: 16776704 current, 16776704 maximum
0.00 % of packets lost during test
Round trip time: 0 msec (minimum), 140 msec (maximum), 7 msec (average)
Jitter: -
0 seconds spend waiting following a timeout
TCP time-out counter: 213
13038 selective acknowledgement packets received

No duplex mismatch condition was detected.
The test did not detect a cable fault.
Network congestion may be limiting the connection.

0.054 % of the time was not spent in a receiver limited or sender limited
state.
0.0 % of the time the connection is limited by the client machine's receive
buffer.
Optimal receive buffer: -524288 bytes
Bottleneck link: 10 Gigabit Ethernet/OC-192
12216 duplicate ACKs set

**************************************

Your test results
Summary Details Advanced
Web100 Kernel Variables:
Client: WWORKSTATION18/10.1.128.208
The theoretical network limit is 378.84 Mbps
The NDT server has a 11487.0 KByte buffer which limits the throughput to
24131.74 Mbps
Your PC/Workstation has a 16383.0 KByte buffer which limits the throughput to
17208.40 Mbps
The network based flow control limits the throughput to 8897.05 Mbps

Client Data reports link is '10 Gig', Client Acks report link is 'OC-48'
Server Data reports link is '10 Gig', Server Acks report link is '10 Gig'

=== Results sent by the server ===



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