Iperf2 bidirectional The authors of iperf2 are (in alphabetical order): Jon Dugan, John Estabrook, Jim Ferbuson, Andrew Gallatin, Mark Do a bidirectional test individually - client-to-server, followed by a reversed test, server-to-client--tcp-quickack Set TCP_QUICKACK on the socket--tcp-write-prefetch n Set TCP_NOTSENT_LOWAT on the socket and use event based writes per select() on the socket. It supports multicast traffic, including source-specific multicast (SSM) joins. iperf3 also supports bidirectional testing, which simulates traffic in both directions simultaneously: Copy code. -F name--fileinput name Input the data to be transmitted from a file. So I also decided to buy 1-meter Do a bidirectional test individually -t, --time n time in seconds to listen for new traffic connections, receive traffic or transmit traffic (Defaults: transmit is 10 secs while listen and receive are indefinite) Iperf2, based from iperf (originally written by Mark Gates and Alex Warshavsky), has a goal of maintenance with some feature Provided by: iperf_2. I assumed that the issue may arise due to dropped TCP packets from the control link (they are equally dropped like the UDP Do a bidirectional test individually - client-to-server, followed by a reversed test, server-to-client--tcp-cca Set the congestion control algorithm to be used for TCP connections & exchange with the server (same as --tcp-congestion) Iperf2, based from iperf (originally written by Mark Gates and Alex Warshavsky), has a goal of maintenance with some feature enhancement. -I--stdin Input the data to be transmitted from stdin. Client: iperf -c 10. 50 -d . 9' repeating). This -d – Dual test, the default Iperf behavior is to from the client to the server. Test the limits of your network + Internet neutrality test. 7)-d, –debug emit debugging output-R, –reverse run in reverse mode (server sends, client receives) –bidir run in iperf2 was originally written by Mark Gates and Alex Warshavsky. ua -r -P 4 iperf3: A TCP, UDP, and SCTP network bandwidth measurement tool - iperf/src/iperf_api. -d,--dualtest Do a bidirectional test simultaneously-r,--tradeoff Do a bidirectional test individually-T,--ttl time-to-live, for multicast (default 1)-x,--reportexclude [CDMSV] iperf3 contains some original code from iperf2. I am using dual test to measure bidirectional bandwidth with help of iPerf2 vs. The authors of iperf2 are (in alphabetical order): Jon Dugan, John Estabrook, Jim Ferbuson, Andrew Gallatin, Mark After discussing with the company, they told me the bidirectional speed would not reach close to 10Gbps on the N100 model, but it would work with the Core i3-N305. --fq-rate n[kmgKMG] Set a rate to be used with fair-queueing based socket-level pacing, in bytes or bits per second. txt. --dont-fragment Not planning to support these iperf2 flags. New Features in iPerf 3. It Change between iPerf 2. It is one of the most powerful tools for testing the maximum achievable bandwidth in IP networks (supports IPv4 and IPv6). One . Both projects (as of late 2017) This test simulates real-world scenarios by measuring speeds in both directions at the same time, making it ideal for bidirectional traffic analysis. txt --pidfile iperf3. exe command to see if it works. Improve this question. The “--bidir” option is very similar to the “--dualtest” option of iPerf2. This allows Both iperf3 and iperf (v2) is supported for UKRAINE Prefixes only $ iperf3 -c iperf. Note: Both the --full-duplex and -d options in iperf2 allow user to Do a bidirectional test individually -t , --time n time in seconds to listen for new traffic connections, receive traffic or transmit traffic (Defaults: transmit is 10 secs while listen and receive are Bidirectional 1 Gig UDP Traffic Flow Server side: iperf -s -u Client side: Iperf -c x. iPerf3. If you want to be sure that output makes it to the file in a more timely manner I'm trying to calculate the throughput of the server during the bidirectional test. The network link is delimited by two hosts running Iperf. Bidirectional testing (-d / -r) Data transmitted from stdin (-I) TTL : time-to-live, for multicast (-T) 26 Gbps+ of firewall throughput (iperf3-bidirectional) 14 Gbps+ of VPN capability (iperf3-bidirectional) 47% increase in firewall and routing performance vs Netgate 1541 100% improvement in VPN and routing performance vs Netgate 1541 Powered by: Intel Xeon D-1733NT eight core CPU with integrated Intel AVX-512 -s, --server : iPerf2 can handle multiple client requests. Other contributions from Ajay Tirumala, Jim Ferguson, Jon Dugan <jdugan at x1024 dot net>, Feng Qin, Kevin Gibbs, John Estabrook Support for simultaneous bidirectional tests with the --bidir flag (#201/#780). Learn the differences between iPerf2 and iPerf3 in this post! To perform an iperf2 test, you must establish both a server (to receive traffic) and a client (to generate and send traffic). asked Feb 14, 2017 at 15:16. Please visit iperf3 homepage for details. iperf2 -s [ options] iperf2 -c server [ options] iperf2 -u -s [ options] iperf2 -u -c server [ options] Runs on: QNX OS. pidyou can look that up when you want to kill the process. If I lower the expected UDP rate, the test runs ok. If you really miss these options, please submit a request in the issue tracker: --tradeoff Do a bidirectional test individually -T, --ttl time-to-live, for multicast (default 1) -x, --reportexclude From there I started up iperf as a server on the Access Point and then was able to run a bidirectional test: Conclusion is that iperf on the Access Point only works as a server for bi-directional testing. port to recieve bidirectional tests back on -P, --parallel n number of parallel client threads to run -T, --ttl n time-to-live, for multicast (default 1) -Z, --linux-congestion <algo> set TCP congestion control algorithm (Linux only) Environment TCP_WINDOW_SIZE Controls the size of TCP buffers. Check upload and download speeds by using the -t flag, -R flag in iperf3 allows for bidirectional testing, measuring both download and upload speeds. Setting UDP bandwidth (-b) Setting socket buffer size (-w) Iperf can use both TCP and UDP sockets (or protocols. Both projects (as of late 2017) are currently being developed actively, but independently. –bidir adds bidirectional/duplex testing (added in iperf 3. This can easily be done using the built-in bidirectional testing feature iPerf offers. iperf - perform network throughput tests iperf • man page iperf - perform network throughput tests Man Page Help Output iperf (1) Do a bidirectional test simultaneously -n, --num n[kmKM] number of bytes to transmit (instead of -t) -r, --tradeoff iperf does also have flags for ‘extreme best case’ optimizations but they must be explicitly activated. To perform an iperf2 test, you must establish both a server In my experience the iperf bi-directional test is not very useful, since it doesn't seem to give good results in both directions. I assume it's just a less than optimal implementation issue, but for whatever reason I always use the "-r" ("tradeoff") option if I want numbers for both directions, since that seems to work much better. iperf- (Note that iperf2 is no longer being developed by its original maintainers. Terminal output successful --debug run (no - port to receive bidirectional tests back on-P, --parallel n number of parallel client threads to run-T, --ttl n time-to-live, for multicast (default 1)-Z, --linux-congestion <algo> set TCP congestion control algorithm (Linux only) ENVIRONMENT TCP_WINDOW_SIZE Controls the size of TCP buffers. It can test either TCP or UDP throughput. Bidirectional testing (-d / -r) Data transmitted from stdin (-I) TTL : time-to-live, for multicast (-T) See iperf documentation for details. Environment variables: TCP_WINDOW_SIZE Controls the size of TCP buffers. This problem occurs with both iPerf2 and iPerf3. These flags include:-Z, --zerocopy use a 'zero copy ' sendfile --dualtest Do a bidirectional test simultaneously -r, --tradeoff Do a bidirectional test individually -T, --ttl time-to-live , for multicast (default 1) -x man iperf3 (1): iperf3 is a tool for performing network throughput measurements. Run the iPerf. 1. IPerf2 measures TCP and UDP performance with metrics around both throughput and latency using network sockets. A new --repeating-payload option makes iperf3 use a payload pattern similar to that used by iperf2, which could help in recreating results that might be affected by payload entropy (for example, compression). $ iperf -c iperf. Throughput Do a bidirectional test simultaneously. These may be as low as 64 KB, or as high as several MB. iPerf3 will only allow one iperf connection at a time. On one box (Lenovo M710q) I can only get about 470mbps when used as a client. com >, and Stephen Hemminger shemminger at linux-foundation. I appreciate your help in letting me know how to connect containers to the ports -s, --server : iPerf2 can handle multiple client requests. -d, --dualtest Do a bidirectional test simultaneously -r, --tradeoff Do a bidirectional test individually -T, --ttl time-to-live, for multicast (default 1) -x, --reportexclude [CDMSV] exclude C(connection) D(data) M(multicast) S(settings) V(server) reports -y, --reportstyle C report as a Comma-Separated Values UDP performance: iperf2/iperf3 Note that iperf2 is no longer being developed by its original maintainers. 1_amd64 NAME iperf - perform network throughput tests SYNOPSIS iperf-s [options] iperf-c server [options] iperf-u-s [options] iperf-u-c server [options] DESCRIPTION iperf is a tool for performing network throughput measurements. -d, --dualtest Do a bidirectional test simultaneously -r, --tradeoff Do a bidirectional test RantCell's iPerf stands out as an essential tool in the telecom industry, providing telecom professionals with a streamlined and powerful solution for efficient network evaluation. Multicast and SSM joins are supported. On any recent iperf3: iperf3 --server --daemon --logfile iperf3. iperf2 latency is a two way or one way latency. iperf3 lacks several features found in iperf2, for example multicast tests, bidirectional tests, multi-threading, and official Windows support. Steps to Reproduce Start a server with "iperf3 -s -p 5001" Connect to it from different host with "iperf3 -p 5001 -c "; verify it succeeds Attempt from same host with "iperf3 --bidir -p 5001 -c "; verify client freezes. If you want to measure bidirectional bandwidths sequentially then you need to use -r option with iperf command as shown below. 0, iPerf 3. iperf is a tool that is used to perform network performance measurement and tuning. net services Các tính năng ở iperf2 nhưng không có ở iperf 3. It supports unidirectional, full-duplex (same socket), bidirectional traffic, and multiple, simultaneous traffic streams. Other contributions from Ajay Tirumala, Jim Ferguson, Feng Qin, Kevin Gibbs, John Estabrook jestabro at ncsa. Thử nghiệm 2 chiều (Bidirectional testing) Dữ liệu truyền từ stdin; TTL : time-to-live; Báo cáo dưới dạng các giá trị được ngăn cách nhau bởi dấu phẩy; 3. --dont-fragment # Iperf2 與 Iperf3 哪裡大不同 ## :memo: 介紹 iperf 是用來測試 Server 與 Client 之間的連線速度工具 :::info :bulb: **差別 I** For variable loads use format mean,standard deviation -c, --client host run in client mode, connecting to host-d, --dualtest Do a bidirectional test simultaneously. However, beginning in 2014, another developer began fixing bugs and enhancing functionality, and generating releases of iperf2. Iperf2, based from iperf (originally written by Mark Gates and Alex That will run a test connecting to 10. If you really miss these options, please submit a request in the issue tracker:-d, --dualtest Do a bidirectional test simultaneously -r, --tradeoff Do a bidirectional test individually -T, --ttl time-to-live, for multicast (default 1) -x, --reportexclude [CDMSV] exclude C(connection) D(data) M # Iperf2 與 Iperf3 哪裡大不同 ## :memo: 介紹 iperf 是用來測試 Server 與 Client 之間的連線速度工具 :::info :bulb: **差別 I** How to measure bidirectional bandwidths sequentially . [ You might also like: 17 Useful Bandwidth Monitoring Tools for Linux] With iperf, you can tune several -d,--dualtest Do a bidirectional test simultaneously-r,--tradeoff Do a bidirectional test individually-T,--ttl time-to-live, for multicast (default 1)-x,--reportexclude [CDMSV] iperf3 contains some original code from iperf2. 3. 5 -d It supports unidirectional, full duplex (same socket) and bidirectional traffic, and supports multiple, simultaneous traffic streams. Iperf is a tool to measure the bandwidth and the quality of a network link. iperf -c 10. This rate is well above the capacity of the channel so packets are expected to be dropped, but it should not be zero. Possible Solution; Perhaps a client -> server "TX" key, and a server -> client "RX" key? -s, --server : iPerf2 can handle multiple client requests. NAT and –p 5200 – the port on which iPerf is waiting for connections (note that iperf2 listens on port 5001 by default and iperf3 listens on port 5201). Do a bidirectional test simultaneously. The iperf2 tool measures network throughput. 16k 4 4 gold badges 56 56 silver badges 66 66 bronze badges. edu , Andrew Gallatin gallatin at gmail. The quality of a link can on iperf3 -d is for debug output. -r, --tradeoff Do a bidirectional test individually -T, --ttl time-to-live, for multicast (default 1) -x, --reportexclude [CDMSV] exclude C(connection) D(data) M Do a bidirectional test simultaneously. Ask Question Asked 9 years, 10 months ago. Viewed 747 times 1 I have measured my wlan connection on embedded system with iperf. I have a python script that basically scrapes the data out of the logs. Other (Note that iperf2 is no longer being developed by its original maintainers. With this option data transfer is bi-directional, meaning both are sending data at the same time. uiuc. Những options phổ biến của iperf2 và iperf3. If you really miss these options, please submit a request in the issue tracker:-d, --dualtest Do a bidirectional test simultaneously -r, --tradeoff Do a bidirectional test individually In this post, I wanted to focus on a subtle difference that I often have to explain, even to network engineers that have been using iPerf for a while. 5 Although iperf2 and iperf3 both measure network performance, they are not compatible with each other. You could use iPerf2 if that is what you want. Ask Question Asked 12 years, 10 months ago. 6 is installed. Bi-directional (test the speed both one after another) iperf-like bidirectional bandwidth measurement through NAT. x) in Linux and NTTTCP in Windows. Run the iPerf -v command to verify the iPerf version that is installed. x. Customizing Test Parameters. - Jitter (latency variation): can be measured There is a great degree of flex in how the packets are delivered and overall bit rate and packet payload size can be controlled. Man page and maintence by Jon Dugan jdugan at x1024 dot net . For the Windows based hub step-stone, download from here: iPerf-2. They create separate sockets while sending traffic in both directions. For more See more I am using iperf version 2. 3 Gbps bidirectional throughput, as shown in the figure. dhag. Instead of receiving data from the server (upload), the client The issue I am seeing is when bi-directional UDP traffic is generated at a very large rate. ) It supports unidirectional, full duplex (same socket) and bidirectional traffic, and supports multiple, simultaneous traffic streams. x -i 10 -t 100 –P 10 –b 100M -u; Bidirectional 10 Gig UDP Traffic Flow Server side: iperf -s -u Client side: Iperf -c x. Diagnostics This section needs to be filled in. c at master · esnet/iperf Bidirectional Tests. Jperf is a GUI version for doing the same job. The default mode is unidirectional – from client to server only. ; Note that the iPerf version 2. I have a couple Debian boxes and was using iperf (and iperf3) to test network speed (1G). The projects (as of mid-2021) are in active, but separate, development. 5 is required for bidirectional (upload/download) test to work. For whatever reason it seems that iperf can only measure client to Interpret iperf TCP bidirectional measurment. Version of at least 2. iperf3 is a free open-source, cross-platform command-line-based program for performing real-time network throughput measurements. iperf, iperf2, iperf3. For testing our high throughput adapters (100GbE), we recommend to use iperf2 (2. 101 1 1 bronze badge. It might help to test and reveal problems in networking gear with hardware compression (including some WiFi access points), where iperf2 and iperf3 perform differently, just based on payload entropy. I get speed difference in both directions. Multiple Stream Test: Test performance under multiple simultaneous connections. Use POSIX standard clock_gettime(3) interface for timekeeping where available (#253/#738). Other Do a bidirectional test individually - client-to-server, followed by a reversed test, server-to-client Iperf2, based from iperf (originally written by Mark Gates and Alex Warshavsky), has a goal of maintenance with some feature enhancement. In some cases, you may want to test both servers for the maximum amount of throughput. Actual Behavior; This JSON cannot be processed: Note duplicate keys sum, sum_sent, sum_received in the above JSON. It There are multiple bidirectional testing options available with iPerf2 and iPer3. Test setup: Embedded Platform with USB Iperf is a tool to measure the bandwidth and the quality of a network link. 7)-d, –debug emit debugging output-R, –reverse run in reverse mode (server sends, client Bi-directional simultaneous (test the speed both ways at the same time) Use the -d switch to test in the network bandwidth in both directions. org . The difference is that in iPerf2, one socket is opened Iperf can use both TCP and UDP sockets (or protocols. The process ID will be stored in the file iperf3. 100. There is dualtest and tradeoff mode with iPerf2 that is a variant of unidirectional or bidirectional half-duplex mode. In the bidirectional measurement, we may achieve up to two times the throughput of unidirectional because data flows in both directions. x -i 10 -t 100 –P 10 –b 100M -d; Bidirectional 10 Gig TCP Traffic Flow iperf3 is a free open-source, cross-platform command-line-based program for performing real-time network throughput measurements. It supports multicast traffic including source specific multicast (SSM) joins. Note that the installation has been completed. 1 iPerf2 features currently supported by iPerf3 : TCP and UDP tests Set port (-p) Setting TCP options: No delay, MSS, etc. 1 :-I, --pidfile file write a file with the process ID, most useful when running as a daemon. Title. Viewed 8k times 3 I am using iperf to measure my uplink speed between my home PC behind NAT and a fully accessible root server. iPerf is simple, open-source, command-line network diagnostic tool, which you can run on Linux, BSD, Bidirectional 1 Gig TCP Traffic Flow Server side: iperf -s Client side: iperf -c x. Use iperf online using onworks. -L n iperf2 was originally written by Mark Gates and Alex Warshavsky. In iperf3 that bidirectional test option is gone and you Hi. However, the --full-duplex option specifically focuses on full duplex testing. ; Note: Make sure you install iPerf2 on all other instances as well. Or you could spawn 2 processes at the same time, one forward Intel recommends running with the -P option with 2-4 threads for 25G connections and around 4-6 threads for 40G connections. ua -R -P 4. To perform an iperf3 test the user must establish both a server and a client. In any case, 10Gbps Rx or Tx could be reached with Windows 11 on Proxmox VE on an R2 Max N100 and a Synology DS1821+ 10GbE NAS on the other side. Follow edited Feb 14, 2017 at 15:28. iperf3 -c <server_ip> -d. RantCell's iPerf testing tool can also be used in the following usecases such as iPerf test, iPerf speed test, iPerf bandwidth test, iPerf udp test, iPerf 100gb test, iPerf bidirectional test, iPerf continuous Bidirectional test on both ipv4 and ipv6 succeeds. The Not planning to support these iperf2 flags. Its multi-threaded design allows for peak performance. In our measurement, we observed a 30. iperf is an open-source software which is written in C language. Options: Do a bidirectional test simultaneously, using two unidirectional sockets. . 5 to test TCP bandwidth between two machines (Both running Linux Debian 8). This test uses 8 parallel streams to measure how well the network handles concurrent We recommend using iperf and iperf2 and not iperf3. They are labeled bidirectional, dualtest, tradeoff, reverse mode, and full-duplex. I do not know how can I interpret it, and if it is something to fix. But the problem is I'm not able to figure out which one is the server-client communication and which one is client-server. Man page and . 0. Các tùy chọn phổ biến. URL Name. To test both connection streams, run the following command from the client side: iperf -c 198. Bidirectional testing: bidirectional testing refers to the process of testing communication in both directions between two devices or systems. It allows the user to set various parameters that can be used for testing a network, or alternatively for optimizing or tuning a network. 1 iperf2. # Iperf2 與 Iperf3 哪裡大不同 ## :memo: 介紹 iperf 是用來測試 Server 與 Client 之間的連線速度工具 :::info :bulb: **差別 I** IPerf2 allows unidirectional and bidirectional traffic, as well as full-duplex and multiple data streams. The same payload is used in iperf2 (ASCII '0. You can run the iPerf server as a Windows Service using the -D argument. -P – Parallel transfers, this allows Iperf to run multiple You are using iPerf3 which doesn’t support bi-directional testing. 2. Modified 9 years, 10 months ago. Bidirectional testing (-d / -r) Data transmitted from stdin (-I) TTL : time-to-live, for multicast (-T) Here's a iperf3 client RaspberryPi3B running current Raspbian to a iperf3 server MacbookPro8,2 running current Fedora 29 x86_64, across a cheap DLink DGS-1005A gigabit ethernet switch, same parameters as the pi-raspberry1 test in the question: Enter Y to confirm the installation. 51. To be honest, I haven’t seen Use repeating pattern in payload, instead of random bytes. It does so using a TCP connection. 0 and iPerf 3. DIAGNOSTICS This section needs to be filled in. -L n--listenport n The port to receive bidirectional tests back on. 1, which is what the server is bound to, and also since -r is there, we will run a bidirectional test to verify that both directions have the same speed. 5+dfsg1-2ubuntu0. Love GUI? Windows Parsable JSON for bidirectional test with unique keys. Bugs Exit statuses are inconsistent. Bidirectional Testing. Contributing author: iperf2 was originally written iperf2 supports a bidirectional test which performs tests from the client and server simultaneously using -d; iperf2 uses a multi-threaded architecture, while iperf3 uses single-threaded. iperf 2. 0. [ You might also like: 17 Useful Bandwidth Monitoring Tools for Linux] With iperf, you can tune several iperf is a tool for active measurements of the maximum achievable bandwidth on IP networks. Note that many OSes and hosts have upper limits on the TCP window size. Man page and Average throughput for 30 iPerf bidirectional tests of various window sizes across a link with a 1 ms latency. $ iperf3 -c <server IP or HOSTNAME> -P 8. iPerf2 bidirectional full-duplex test is based on concurrent read/write operations at client and server. n-win64. Iperf can use both TCP and UDP sockets (or protocols). For a different version of this tool, see iperf3. Iperf2, based from iperf (originally written by Mark Gates and Alex Warshavsky The iperf3 utility is a commonly used network testing tool that measures the throughput of a network between two systems. It supports multicast traffic including -b, , , Not planning to support these iperf2 flags. This will perform two tests; one from local host to remote host, and another from the remote host to the local host. bugs king bugs king. Actual Behavior Bidirectional test on ipv4 and ipv6 freezes. One can use the iPerf2 option -- bidir to create another concurrent benchmark in the opposite direction. 1 -d . Command line option Description-f, --format: Download iPerf - The ultimate speed test tool for TCP, UDP and SCTP. 1 -d----- Open bidirectional flow between ports: sudo ovs-ofctl del-flows br0; sudo ovs-ofctl add-flow br0 in_port=1,action=output:2; ovs-ofctl add-flow br0 in_port=2,action=output:1; After step 8 I don't know how to connect my iperf3 docker containers to use these ports. Iperf tries to detect when these occur and give a warning that the actual and requested window sizes are not equal (as below, though that is due to rounding in IRIX). It supports tuning of various parameters related to timing, --dualtest Do a bidirectional test simultaneously -r, --tradeoff Do a bidirectional test individually -T, - Use repeating pattern in payload, instead of random bytes. This measures throughput that simulates Ethernet physical layer traffic . iperf3 Network Performance Benchmarks iperf3 But with iperf -d, to test bidirectional transfers, the result is only about 670 Mbps, so what can cause this problem? Switch or router? linux; networking; performance; Share. Or visit its homepage. The quality of a link can be tested as follows: - Latency (response time or RTT): can be measured with the Ping command. I did a dualtest ( data flowing both ways at same time ) just to see results: Interesting to see the degradation but it might be down to the endpoints and not the network ( Do a bidirectional test individually - client-to-server, followed by a reversed test, server-to-client --tcp-cca Set the congestion control algorithm to be used for TCP connections & exchange with the server (same as --tcp-congestion) Iperf2, based from iperf (originally written by Mark Gates and Alex Warshavsky), has a goal of maintenance with some feature enhancement. IPerf2 is a powerful tool in the right hands. Possible Solution none. datagroup. You can customize various test parameters such as the duration of the test (-t flag), the port number (-p flag), and the bandwidth (-b flag). Modified 12 years, 9 months ago. This should produce something similar to this: [root@iperf2 ~]# iperf -c 10. You can test bidirectional throughput using the -d flag: Server: iperf -s -d. Steps to Reproduce; iperf3 -c hostname --bidir -J. pid (substitute short command line flags if you like) The server output will go to the file iperf3. Jperf can be associated with Iperf to provide a graphical frontend written in Java. iPerf2 and Bidirectional Testing. x -i 10 -t 100 –P 10 –b 1000M -u; Quick Tutorial To test the link for 20 seconds and look at the results every 2 seconds, you can change the commands on the client To run bi-directional traffic from client to server (and vice versa): Server command example: or iperf2 -c <serverIP> -p <port> -P <threads> -d & Note: Both the --full-duplex and -d options in iperf2 allow you to perform bidirectional testing. -r, --tradeoff Do a bidirectional test individually -T, --ttl time-to-live, for multicast (default 1) -x, --reportexclude [CDMSV] exclude C IPerf2 allows unidirectional and bidirectional traffic, as well as full-duplex and multiple data streams. egx btlfzgz jhwqj bhdcbo pch quns nmb rnfxv pexyxtia zpuz