Recent changes to support-requests

suse iperf 3 in suse linux 12 and suse linux 15

chidambaram v — Tue, 18 Apr 2023 14:57:50 -0000

Hello Team

I am trying to install the iperf 3 in suse linux 12 and suse linux 15 before are the two options which I have tried and both failed please advice

tried to install the rpm package for 64 bit open suse and I installed it in suse linux but getting a dependency error couple of dependency libiperf.so.0()(64bit) and libiperf0 (I dont see any suselinux binary / rpm in https://iperf.fr/iperf-download.php )

rpm -ivh iperf-3.13-74.1.x86_64.rpm --test
warning: iperf-3.13-74.1.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 392ffa88: NOKEY
error: Failed dependencies:
libiperf.so.0()(64bit) is needed by iperf-3.13-74.1.x86_64
libiperf0 = 3.13-74.1 is needed by iperf-3.13-74.1.x86_64

    is there any explicit package for suselinux with all the dependency I am not able to find anything in full rather than install each and everything separately which could break the system

I checked the https://github.com/esnet/iperf website and downloaded the tar ball for iperf and extraceted and tar and tried to install but it also had a failure
configuration is failing

System setup guide - best practices

Glen Bojsza — Wed, 11 May 2022 14:31:22 -0000

Hello,

I am completely new to iPerf and I am looking for guidance on the correct or best system setup for the following scenario...hopefully recognizing the hardware specifications and noting if they require changes.

Server : Ubuntu 18.04 ; iPerf3 ; 64 GB ram ; 10 GB interface card
Clients: 25 wifi based Android tablets

How should iPerf3 be configured on the server (ie systemd? spin up threads on startup?)
If a connection between a tablet and the server drops but comes back does the iPerf3 startup again or is there a reconnect script or command that can be used at server startup that can be used?
Wanting to optimize the traffic to each tablet and based on the 10 GB interface card should we over subscribe the amount of data rate?
Should the server be upgraded to the latest Ubuntu release

Any help with this setup would be appreciated along with any other considerations that would help us get started.

regards,

iperf 3 weird speed response

Muhammad Usman Sarwar — Fri, 18 Mar 2022 05:35:32 -0000

hi,
we are running iperf3, during our speed test we found that upload speed is 94 and download speed is 10, in another instance we found that upload/download speed is 30/30. this seems to be weired as all the network path is same, does someone has any suggestion, thanks

iperf 3.1.5 not showing server summary for UDP

Kevin White — Fri, 10 Dec 2021 07:48:02 -0000

Server running on Android:
iperf3-arm --server --bind 192.168.1.6 --port 5001 --interval 1 -f k

Summary is 0
[ 6] 9.00-10.00 sec 5.51 MBytes 46225 Kbits/sec 0.071 ms 250/4239 (5.9%)
[ 6] 10.00-10.02 sec 105 KBytes 36572 Kbits/sec 0.112 ms 0/74 (0%)

[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams
[ 6] 0.00-10.02 sec 0.00 Bytes 0.00 Kbits/sec 0.112 ms 2117/42753 (5%)

Client running on Linux:
iperf3-x86 --client 192.168.1.6 --time 10 --bind 192.168.1.8 --port 5001 --interval 1 --parallel 1 --udp --bandwidth 50M -f k

Shows good summary:
[ 4] 8.00-9.00 sec 5.96 MBytes 49976 Kbits/sec 4315
[ 4] 9.00-10.00 sec 5.96 MBytes 49972 Kbits/sec 4313

[ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams
[ 4] 0.00-10.00 sec 59.0 MBytes 49524 Kbits/sec 0.112 ms 2117/42753 (5%)
[ 4] Sent 42753 datagrams

Any idea why the server summary is 0?

Creating rpm file for RHEL using iperf-3.9 build

Tim — Sun, 04 Oct 2020 09:15:03 -0000

I downloaded iperf-3.9 source file from here:
https://downloads.es.net/pub/iperf/iperf-3.9.tar.gz

I need to create an installation rpm file for RedHat Linux (3.10.0-1127.el7.x86_64) so that it could be installed on any machine.
I followed instructions online on how to create an RPM file using a spec file and I did that on one virtual machine. It did get created but with an error:

Transaction check error:
file /usr/share/man/man1 from install of iperf-3.9-1.el7.x86_64 conflicts with file from package filesystem-3.2-25.el7.x86_64

It seems I'm not able to install it properly using 'yum install' on this machine or when I copy the rpm file to another machine.
What seems to be the problem in building the rpm? I attached the rpm file I created.

I would actually greatly appreciate if someone could create an rpm file for RHEL and share the file and steps to do it.

Thank you in advance!!

IPerf VM connectivity issue on Azure VM

J Anand Sukumar — Wed, 02 Sep 2020 09:25:01 -0000

Hi Team,

We are from IPInfusion, Bangalore team. We are planning to do Throughput test (for IPSEC VPN) on our VM using IPerf tool in Azure cloud. We are unable to connect the IPerf vm to our VM.
Can you please let me know the steps to connect.

Note: I want to send Bi-directional traffic from Iperf Client to Iperf Server via Virtual Router

Please find the attached topology which we are planning to bringup on Azure Cloud.
Can you please share the contact details also for feature refference.

Regards,
Anand

Packet discard

Carlos Henrique — Mon, 07 Oct 2019 22:39:13 -0000

Please consider the following topologies:

1- a desktop (as iperf client) connected in an access point via UTP cable and a notebook (as iperf server) wireless connected in this access point;

2- a desktop (as iperf client) connected in a notebook (as iperf server) via UTP cable both FE interfaces.

What is the reason there are a lot of packet discards in a iperf test in topology 1 from the client in wired side to the server in wireless side? For example iperf -c x.x.x.x -i1 -t5 -u -b11m (wired client side) and
iperf -s -u (wireless server side) in a 802.11b connection with data rate of 11 Mbps that normally has throughput of 6.5 Mbps showing about 33% of packet discard if the same does not occur in topology2 with the server and client in the wired side, for example iperf -c x.x.x.x -i1 -t5 -u -b200m (2x FE capacity configured in notebook client side) and
iperf -s -u (desktop server side) with no packet discard?
Thank you.

I NEED HELP

Ash Fletcher — Mon, 05 Aug 2019 12:42:12 -0000

Can't run iperf 3.1.3 or any other version. when i click on the .exe file, it flashes on the screen then disappears. how do i actually use this thing? also is there a user guide that is readable for a baby? never used this before.

any help would be amazing.
thanks

iperf3 cannot compute network bandiwdth when too many workloads are running on the machine

Fabrizio Barcaroli — Wed, 29 May 2019 17:31:28 -0000

I see that sometimes iperf3 compute a bandwidth that is not in line with the available bandwidth because of the high amount of workloads on the machine which "steal" either CPU or network bandwidth from iperf3. Is that possible? Is iperf3 not able to compute bandwidth when there are too many processes getting machine resources from themselves? Thanks!

Meaning of -P switch, how it should be modified on network devices

Peter Orecny — Mon, 18 Feb 2019 12:14:01 -0000

Hi, I'd like to ask you for help to identify restriction on bandwidth in one connection what I measure. If I run iperf3 with parameter -P < 4 (number of clients) between two IPs on selected TCP port, bandwidth is much lower as it is with P > 6 where bandwidth reach requested values. What parameter P really test on connection between two IPs, please? What is possible to modify on netwrok devices to eliminate this behaviour?

Thank you for your answers