The iperf tag has no wiki summary.
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0answers
57 views
Test connection quality between 20+ remote locations [closed]
We're looking to measure
bandwidth
route
latency
between servers located at (20-30) locations across Africa.
One proposed solution is a script that would
launch an iperf server process for ...
0
votes
2answers
1k views
Why is UDP slower than TCP on Ubuntu Server?
I transfer data between two Ubuntu Servers (12.04) via iperf on 1Gb LAN.
iperf -s <-> iperf -c <addr> -n2G
TCP speed = 925 Mbits/sec
iperf -su <-> iperf ...
0
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1answer
166 views
Installing iperf without internet or c++ compiler
I'm having a bit of a tricky problem installing Iperf. So the I need to install iperf on 2 remote boxes, The problem is that these boxes do not have internet access. I can't install from the binary ...
3
votes
1answer
688 views
How does iperf calculate throughput and jitter?
I've read that iperf basically tries to send as much information down a connection as quickly as possible reporting on the throughput achieved. This tool is especially useful in determining the volume ...
0
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1answer
371 views
Iperf bidirectional bandwidth measurement
Server side:
# iperf -s
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
[ 4] local 192.168.24.243 port 5001 connected with 192.168.24.242 port 44809
[ ID] Interval ...
4
votes
3answers
981 views
Different versions of iperf for windows give totally different results
Measuring TCP output from a Windows client to Solaris server:
WXP SP3 with iperf 1.7.0 --> returns an average around 90Mbit
Same client, same server but iperf 2.0.5 for windows --> returns an average ...
1
vote
1answer
784 views
Iperf from one interface to another on the same computer?
I need to test network throughput of a server to/from itself (it's a lonnnng story!).
I love Iperf and use it across the network, but, I just can't figure out how to bind it to a single interface and ...
2
votes
2answers
272 views
Interconnected switches Slow throughput
I am in charge of a network of which a portion of it looks like this:
One DLink DGS-1210-24 (1) as the main switch.
One DLink DGS-1210-16 (2) connected with cat5e 250 feet away connected on (1)
One ...
3
votes
1answer
771 views
Increasing the number of outbound TCP connections
I am developing a small test client for websockets. I am using Ubuntu 11.04 . I have read
http://stackoverflow.com/questions/410616/increasing-the-maximum-number-of-tcp-ip-connections-in-linux and I ...
1
vote
1answer
579 views
Iperf udp test show only 50 % of bandwidth
I test bandwith with iperf. I set up UDP protocol.
I'm trying to setup limit from 10 to 100 megabit/s. Until 90 megabit max speed is correct.
When I write -b 100m or don't write this speed become ...
2
votes
1answer
998 views
iperf-like bidirectional bandwidth measurement through NAT
I am using iperf to measure my uplink speed between my home PC behind NAT and a fully accessible root server. It does so using a TCP connection. For whatever reason it seems that iperf can only ...
2
votes
2answers
104 views
File transfer - Bandwidth flickering for no reason
We are experiencing file transfer issues. I try to troubleshoot this problem but it is really hard.
Here is a screenshot I took while transferring a file from my workstation to another server. The ...
5
votes
1answer
1k views
iperf max udp multicast performance peaking at 10Mbit/s?
I'm trying to test UDP multicast throughput via iperf but it seems like it's not sending more than 10Mbit/s from my dev machine:
C:\> iperf -c 224.0.166.111 -u -T 1 -t 100 -i 1 -b 1000000000
...
3
votes
1answer
514 views
IPerf - Reverse test
I'm trying to perform a test using IPerf but in a special case. Usually iperf client send data to iperf server, what I need in this case is the server send data back to the client in the same ...
2
votes
1answer
390 views
Measuring network performance between Windows and Linux
I'm using iperf to estimate network performance between Windows and Linux.
For TCP iperf shows 312 Mbits/sec from a Linux server to a Windows client, but it shows only 160 Mbits/sec from a Windows ...
0
votes
2answers
4k views
iperf connect failed: Connection refused
iperf -c 192.168.3.2 -i 2
connect failed: Connection refused
3.2 is another machine. I think the port might be blocked.
How can I make this work?
3
votes
1answer
887 views
iperf 2.0.5 on Windows 7: degraded/inaccurate throughput
Was testing out some wireless equipment today using iperf on (at first) two Windows XP workstations. Throughput testing was fairly consistent at around 18Mbps.
Moved equipment around (outside), ...
1
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0answers
340 views
iperf - first packet loss and acceptable jitter
I'm using iperf to test the bandwidth on my network. I have a few questions:
1. I'm running this command on the client: "iperft -c -u -b 400m" and it successfully runs. I'm running the command ...
1
vote
1answer
385 views
iperf installation and use
I would like to use iperf to test my WAN bandwidth connection. However, I can't find a good method to install and administer it. I'm a Windows guy and don't know much about Linux, and googling iperf ...
0
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2answers
3k views
WARNING: did not receive ack of last datagram after 10 tries
I use iperf to test bandwidth, if i set large test bandwidth, it gives me "WARNING: did not receive ack of last datagram after 10 tries" and there is no report, i want to know what does this mean?
...
-1
votes
2answers
853 views
Testing download speed using iperf
I am using iperf to test my bandwidth. But I am not getting whether it is showing my upload or download speed. Say, I have two PCs A and B. If I want to test how fast I can download a file to A from ...
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1answer
382 views
Can I pull data from server to client with Iperf?
To test bandwidth, I just can push data from client to server with iperf. But can i pull data from server to client ? that is like webserver, the client request data, then server give data to client?
-1
votes
1answer
789 views
Iperf TOS issue on Windows
Hi I tried to execute Qos tests using Windows machine.When send some prioritized traffic usinf -S option it sends only normal data.Registry setting DisableUserTOSSetting is set to 0.
When send TOS ...
5
votes
4answers
3k views
Packet loss rate with iperf and tcpdump
I tested a line for its link quality with iperf. The measured speed (UDP port 9005) was 96Mbps, which is fine, because both servers are connected with 100Mbps to the internet. On the other hand the ...
1
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1answer
539 views
benchmark tcp: ab or iperf like tool to send hex/binary/pcap data?
I have written a server in Twisted for a current project I'm working on, and now I need to test it. It receives TCP packets, with the payload consisting of just a serialised binary string. I want to ...
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3answers
1k views
Can software traffic generator generate 100 Mbps traffic?
Can software traffic generators like iperf etc can generate 100mbps traffic?
else is there any software generators which can produce such high rates ?
Regards,
Mithun
0
votes
1answer
751 views
Throughput tool with decent graphing
I've been looking through some of the tools available for generating traffic to measure maximum network throughput, namely iperf, bwping, ttcp, etc. I am planning on doing throughput tests over a long ...
0
votes
2answers
1k views
Command line based IP traffic generator
Does anyone know of a command line based traffic generator which can produce IP traffic so that we cant test QOS feature on DSL modem . It would be good if we can set the dscp marking in the IP ...
5
votes
4answers
10k views
Pre-compiled Iperf 2.x binary for win32?
I'd like to do some network testing on Windows using Iperf. The latest on sourceforge appears to be 2.0.4. However, it's only available as source to be compiled. I attempted to do some google ...
