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1answer
69 views

ping works but iperf3 doesn't show any traffic for TCP

machine A has IP (eth0: 192.168.1.1, eth1: 10.10.xxx.yy) machine B has IP (eth0: 192.168.1.2) A and B are connected through RJ5 on eth0, both sides. ping works fine on both side, but when running ...
0
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1answer
188 views

Why does a Bidirectional iperf request freezes on the server to client side?

To diagnose the difference in network trafic between two locations and our main server center, I'm using iperf to log the traffic rate with the following command: iperf -c <server ip> -F ...
0
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1answer
38 views

Why does `iperf` report huge values for bandwidth?

When I try to run iperf on local server it reports reasonable values iperf -c 127.0.0.1 -p 631 ------------------------------------------------------------ Client connecting to 127.0.0.1, TCP port ...
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0answers
172 views

Speed over VPN is 10x slower than connection to VPN or VPN<=>Destination

I'm trying to setup VPN for my own use. I have noticed very strange issue with speeds which I struggle to understand. Question: What is causing slow download speed from AWSFrankfurt when using VPN? ...
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0answers
165 views

not getting fast 802.11ac WiFi speeds

I'm using a Linksys WRT AC1900 router and an Intel 7260 client adapter on my desktop. I've never seen speeds > 10MiB/s at my previous apartment, probably because the router was 30 feet away and the ...
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0answers
174 views

The two lines transfers value about iperf3

I have some questions about the results the iperf3 gives: [ ID] Interval Transfer Bandwidth Retr [ 15] 0.00-10.00sec 9.45 GBytes 8114 Mbits/sec 0 sender [ 15] 0.00-10.00 sec ...
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0answers
57 views

Confusion in Iperf server report?

I am connecting one of my computers to LAN which is connected to 802.11n Access Point using ethernet cable while my other computer is connected to wifi. When I send 20Mbps traffic from iperf while ...
1
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2answers
898 views

iperf giving incorrect results

I've just had new broadband installed, and wanted to test its throughput using iperf3. However it appears to be giving considerably different results than more conventional speed tests. E:\tmp> ...
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0answers
193 views

Incorrect Iperf Configuration? /Thorough Iperf Tutorial

I have a laptop (with Ubuntu) and a router (with OpenWrt). When I check the version for both, the laptop says I have version 2.05 for multithreads and the router says I have 2.05 for pthreads. Both ...
0
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1answer
164 views

iperf and Wireshark show different data rate

I was testing the capture performance of a sniffer application in Linux. I have a Windows machine that sends UDP multicast packets to the capture port of the sniffer system using iperf at 8Mbits/s. I ...
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0answers
408 views

Why is iPerf UDP bandwidth so much lower that iPerf TCP?

I need to perform a single direction iPerf test. Bi-directionally, using TCP, I get 25Mbps. But single direction using UDP I only get 0.7Mbps. Why is UDP rate so much lower that TCP? iPerf client ...
0
votes
1answer
420 views

Graphical representation of iperf3 results

I'm using Iperf3 on 2 machines and actually I'm running 2 instances of Iperf3, one to generate traffic with high priority and the other generates traffic with low priority. I would like to generate a ...
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0answers
153 views

Can I have server and client on the same machine and run network bandwidth test using iperf?

I have two ethernet ports (eth0 and eth1) on my system. I've tested the bandwidth with two systems and got ~940Mbit/s. If I use one of the ports as server and the other as client, I always go through ...
0
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0answers
1k views

iperf returning “bind failed: cannot assign requested address” in Windows XP and 7

I am trying to set up iperf on an old HP server running Windows XP Professional to test multicast, but whenever I issue the command iperf -s -u -B <ip address>, it returns: bind failed: ...
1
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2answers
160 views

Iperf network benchmark measures under-utilized?

I am working on two embeddded high performance network routers and I have connected them point-to-point via a 10Gbit optical fibre cable. I ran iperf benchmarks on them and when I connect through an ...
0
votes
1answer
307 views

Slow LAN connection (especially receiving) on Windows 8

I was diagnosing my SMB performance issues when I noticed my whole network speed was off. These are my benchmarking results between my desktop and my Linux server: Both are connected using CAT6 and ...
1
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0answers
739 views

Iperf tests in reverse direction

I used iperf to measure the max throughput for TCP connection between two ubuntu machines. Both the machines were directly connected be means of a 1Gbps cable. When I performed iperf tests i obtained ...
2
votes
1answer
3k views

How to run IPERF on DD-WRT?

I have IPERF for Windows installed on a desktop computer. Now I want to connect this computer to the router and conduct a simple throughput performance test. For that I will need IPERF running on the ...
3
votes
1answer
3k views

How to perform a network loopback test using TTCP or IPERF?

The PC has two Gigabit Ethernet ports. They function as two separate network adapters. I'm trying to do a simple loopback test between the two. I've tried TTCP and IPERF. They're giving me hard time ...