I see gerror is declared as extern int, ie. Is there more information somewhere as I have no expertise in hsr/prp. I think proposing the command line options gives some insights into things and is good starting point. which might look like 192.168.C.D (but it can be almost anything) even though there was nothing special in /etc/hosts. valid_lft forever preferred_lft forever I did find this issue that may be somewhat related. If I use Internet DNS hostnames, I never see the problem. Receiving 1470 byte datagrams Also tested with the public binaries of iperf3 version 3.1.3, which don't support --bidir, and was able to reproduce the problem with them as well. However I undestand that iperf3 is actively developed and maintained. Also, maybe default the ethertype to 88B5 when --raw is set that way it doesn't need to be passed in. 10.2.128.0 0.0.0.0 255.255.252.0 U 0 0 0 eth0 0.0.0.0 10.2.128.1 0.0.0.0 UG 0 0 0 eth0 Having VMs in the background would have slowed down the system. On a gigabit link, this about the maximum throughput one could hope to achieve before saturating the link and causing packet loss. 169.254.169.254 10.2.128.1 255.255.255.255 UGH 0 0 0 eth0 When using Windows as a client, the option works erratically, often display the message "iperf3: error - unable to connect stream: No such file or directory", but not every time. NOTE: The iperf3 issue tracker is for registering bugs, enhancement It's an active traffic generator in that it sources and sinks its own network i/o traffic. There is some debate over the question of I tried with multiple NICs, and multiple switches, and could reproduce the problem with all of them. iperf UDP server start error, bind failed: Operation not permitted One of the issue that I faced is the lack of tool support to measure performance over raw socket over Ethernet (Not UDP/TCP as is currently supported in iperf2/3). I'm a cybersec Student and i found some code from the internet i try to modify it and try to execute it but it end up giving "socket.gaierror: [Errno -2] Name or service not known" Here is the CODE : how can i fix the error and let the code execute and run normally? hostname: Name or service not known dpkg: error processing ssmtp (--configure): subprocess installed post-installation script returned error exit status 1 Setting up libt1-5 (5.1.2-3.4ubuntu1) . Some DNS servers have round-robin schemes, or others. Can you run ./configure and post the config.log and the config.h? I could write pull request, of course. All Rights Reserved. Perhaps like this: The "[ ]" just indicates it's optional and would only be included on client initiation. inet 10.2.192.55/22 brd 10.2.195.255 scope global eth1 With the use of a custom Ethernet type, we could easily distinguish packets coming from iperf vs packets related to non-iperf transmission in packet sniffing applications by filtering on Ethernet type. This may be a long pull request if I have to patch every single place. !, Unfortunately due to our current tools + setup testing the -B % involves the Windows version, and I can't compile it because I'm not a developer and I don't have the resources, but I'll find somebody that can lend me a hand tomorrow!. OK. Draw the initial positions of Mlkky pins in ASCII art. Now I'm running iperf3 on two machine. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Also, are you cross compiling? If you will use this version it may be possible to identify where the problem occurs. Also, is it possible to try the latest from master for Linux? The text was updated successfully, but these errors were encountered: It looks like you're running iperf3 correctlyat least I do not see any obvious problems. Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site Wrap getaddrinfo to try more than once on Windows. We had previously been using ARP to acquire the server MAC address. A short description of the changes to the command line and to output might be useful before sending patches. The rounting table hasn't changed but iPerf is sending the information over another interface, right? running on my system with the AMD 5950X CPU machine, which is my primary desktop, trying to resolve one of my Unix LAN hosts. iperf3 on Windows, iOS, or Android. I'll give it a shot. I will retry later. I'm investigating how to do that. (If it fails, please inform with the error message and the operating system and kernel details). Of course, it's very unlikely the race would be reproducible within the debugger itself. I just restored my OS from backup, since no 3rd party software seems to be causing the problem. Linux is a registered trademark of Linus Torvalds. Can I knock myself prone? Datagrams -c 239.1.1.2%eth0 on 2.0.13 gives (with eth0 or whatever you put on dev): Server listening on UDP port 5001 What are the implications of constexpr floating-point math? I posted about the issue in : That is probably not the right forum, though. I got the same error, nc is working normal , iperf3 connect refused. Then make 'B' the server and 'A' the client. Regarding the --raw, it has the same functionality as -j. You switched accounts on another tab or window. Connect and share knowledge within a single location that is structured and easy to search. 168.63.129.16 via 10.2.128.1 dev eth0 proto dhcp src 10.2.128.27 metric 100 Looking at the "Binding" note on the man page (https://iperf2.sourceforge.io/iperf-manpage.html), it says that we can use "-c %" so we are lost here.. fill:none; UDP, length 1000, 20:19:22.140452 IP (tos 0x0, ttl 1, id 58980, offset 0, flags [DF], proto UDP (17), length 1028) [ 9] 0.0- 2.0 sec 24.9 MBytes 104 Mbits/sec, [ 4] 0.0- 2.0 sec 24.9 MBytes 104 Mbits/sec, [ 7] 0.0- 2.0 sec 25.6 MBytes 107 Mbits/sec, [ 8] 0.0- 2.0 sec 24.9 MBytes 104 Mbits/sec, [ 5] 0.0- 2.0 sec 25.8 MBytes 108 Mbits/sec, [ 6] 0.0- 2.0 sec 25.9 MBytes 109 Mbits/sec, [SUM] 0.0- 2.0 sec 178 MBytes 746 Mbits/sec, [ 7] 18.0-20.0 sec 28.2 MBytes 118 Mbits/sec, [ 8] 18.0-20.0 sec 28.8 MBytes 121 Mbits/sec, [ 5] 18.0-20.0 sec 28.0 MBytes 117 Mbits/sec, [ 4] 18.0-20.0 sec 28.0 MBytes 117 Mbits/sec, [ 3] 18.0-20.0 sec 28.9 MBytes 121 Mbits/sec, [ 9] 18.0-20.0 sec 28.8 MBytes 121 Mbits/sec, [ 6] 18.0-20.0 sec 28.9 MBytes 121 Mbits/sec, [SUM] 18.0-20.0 sec 200 MBytes 837 Mbits/sec, [SUM] 0.0-20.0 sec 1.93 GBytes 826 Mbits/sec, [ 4] local 10.10.10.10 port 8000 connected with 10.10.10.5 port 53903, [ 5] 0.0- 2.0 sec 25.7 MBytes 108 Mbits/sec, [ 10] 0.0- 2.0 sec 25.9 MBytes 108 Mbits/sec, [ 7] 0.0- 2.0 sec 25.9 MBytes 109 Mbits/sec, [SUM] 0.0- 2.0 sec 178 MBytes 747 Mbits/sec, [ 4] 18.0-20.0 sec 28.8 MBytes 121 Mbits/sec, [ 5] 18.0-20.0 sec 28.3 MBytes 119 Mbits/sec, [ 7] 18.0-20.0 sec 28.8 MBytes 121 Mbits/sec, [ 10] 18.0-20.0 sec 28.1 MBytes 118 Mbits/sec, [ 9] 18.0-20.0 sec 28.0 MBytes 118 Mbits/sec, [ 6] 18.0-20.0 sec 29.0 MBytes 121 Mbits/sec, [SUM] 18.0-20.0 sec 200 MBytes 838 Mbits/sec, [SUM] 0.0-20.1 sec 1.93 GBytes 825 Mbits/sec. [SOLVED] Name or service not known / Newbie Corner / Arch Linux Forums question sites such as Stack Overflow HSR is a redundancy protocol that operates at Layer 2. Then using the source MAC, we can distinguish clients from each other. Thanks your your answer. Why 'MSG_EOF' is not found in my sctp program? On Linux, we get: "error: Name or service not known" no matter what "dev" name we try. I am still using the exact same Aquantia physical NIC, too. Check it using uname -a or uname -r. If you have a lower one, then download a new kernel from The Linux Kernel Archives. I'd love to see what they have in common, in particular the hardware configuration. Debug messages can also cause synchronization issues with stdout/stderr, and hide race conditions. (If it fails, please inform with the error message and the operating system and kernel details). Please fill out one of the "Bug Report" or "Enhancement Request" Sorry for the late reply. As you already know, we don't officially support Windows and it is difficult for us to test on it. 1 Add what command did you use for ssh. ethertype are the experimnental ones of 88B5 and 88B6. Note: Iperf isn't related to wireshark and there shouldn't be any coupling. icons, By: By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. We use iPerf 2.0.13 on Windows (Server 2019) and Linux (Ubuntu 20.04). Why does this Curtiss Kittyhawk have a Question Mark in its squadron code? What's it called when a word that starts with a vowel takes the 'n' from 'an' (the indefinite article) and puts it on the word? To test a 1000Mbps NIC, you can use -b flag with a value of 1000M to set max UDP bandwidth at 1000 Mbit/sec or 1 Gbit/sec. So we would like to have iperf2/3 extended to send and receive frames and measure throughput. 7 I have a Django app in one container, trying to compose it with Redis and Mysql containers. I don't think it's in iperf's interest to do add such support. } Ethernet_datagram; Signature identifies iperf stream from other frame types and stream_id This effect is called Bandwidth Delay Product, or BDP. Ok, fixed the bind to device for TCP (it worked for UDP) Tested with v4 and v6. There are many, many other parameters you can set that are beyond the scope of this article, but for our purposes, the main use is to prove out our bandwidth. Please visit this page to clear all LQ-related cookies. inet 10.2.128.77/22 brd 10.2.131.255 scope global eth0 interface. iperf, sctp command not recognized in command-promt Do large language models know what they are talking about? I've changed it like you wrote (I mean "#define Socklen_t socklen_t") and it compiled OK. to write there your hostname and the hostname in hosts.save. Do top cabinets have to remain as a whole unit or can select cabinets be removed without sacrificing strength? David, the issue appears to be about connect() indeed, not gethostbyname(). I have another server (not cloud instance but physical server). I thought of taking network dumps as well. Do you still have the same problem or it happens only with TCP? -c 239.1.1.1%eth0 If you're using a more sophisticated (distributed) naming system Hi Bob, Even though I have not seen iperf3 fail in single socket mode again, I am also able to show the problem even on the first iteration when running the test program multiple times from a batch file. This is the implementation I'm using, can't find any obvious documentation of the SCTP commands related to this. At the moment, we're using GOOSE Ethernet type but not formatting the payload per GOOSE format. [ 3] 10.0-15.0 sec 634 KBytes 1.04 Mbits/sec I like iperf as it consumes less CPU cycle based on my tests. But iPerf won't say "error", "ens5 does not exist" or whatever and just tries to work. The UDP bandwidth would be sent at bits/sec. 1 Answer Sorted by: 0 This error is coming because after the chef server installation, we do a reconfigure, i.e., chef-server-ctl reconfigure, which always generates ssl certificates with hostname details as /var/opt/opscode/nginx/ca/ip-10-205-78-136.x.y.com.crt. Of course, it's very unlikely the race would be reproducible within the debugger itself. The default is 1 Mbit/sec. How do I get the coordinate where an edge intersects a face using geometry nodes? 10.2.192.0 0.0.0.0 255.255.252.0 U 0 0 0 eth1 If you get any more, youll begin to saturate the link and incur packet loss. 3 Answers Sorted by: 31 For error like "java.net.UnknownHostException: [hostname]" The reason is your hostname is not in /etc/hosts, The solution is simple: sudo vim /etc/hosts change the line looks like: but you should not put a dynamically assigned address into your hosts file 11 September 2018 It is to be used with the -b flag for UDP Bandwidth. Support may be provided on a best-effort basis to other UNIX-like It may be that the connection from Windows takes more time (or that the Cygwin implementation of connect() is different. Here's the packet structure we're proposing: Source MAC (6 bytes) ubuntu - I got error "hostname: Name or service not known" when I was only able to reproduce the problem about once out of 20 tries. I think the proper fix should cache the response. As you can see from the tests above, we increased throughput from 29Mb/s with a single stream and the default TCP Window to 824Mb/s using a higher window and parallel streams. Where can I find the file config.h? Install it using the standard process. The intention here is for providing the user with another mechanism for filtering packets as seen in Wireshark. Do I have to spend any movement to do so? Hostnames can indeed have their address change over time. The --bidir option should work reliably without error every time. I'm using the --bidir feature of iperf3 to measure perform between multiple LAN devices on a variety of operating systems. This is great! arch linux - ping displays "Name or service not known" - Unix & Linux I tried as high as --connect-timeout 50000 . The text was updated successfully, but these errors were encountered: Thanks for creating this issue. privacy statement. |[ 4] 0.0-10.0 sec 99.1 MBytes 83.4 Mbits/sec 0.041 ms 2/70562 I also thought about caching the responses. So, it may not be related. iperf -c -B --raw . Why do I get hostname: Name or service not known error? How to maybe reset the buffer size? Can you use -c 239.1.1.2%dev and on the server -B 239.1.1.2%dev or -B 0.0.0.0%dev, default via 10.2.128.1 dev eth0 proto dhcp src 10.2.128.27 metric 100 typedef struct Ethernet_datagram { Is the difference between additive groups and multiplicative groups just a matter of notation? So what more can we do? Iperf 2 / Discussion / General Discussion: Supporting L2 (raw socket That doesn't make sense,right? Sending 1000 byte datagrams, IPG target: 7629.39 us (kalman adjust) I think have the -B and -c ip, port and device binding code cleaned up and working, at least for the tcp/udp/ip cases. Docker compose - Name or service not known when calling service from Iperf 3 doesn't work with iperf 2 as an example and there is no support for a non-iperf connection by an iperf server. Description of option: System registration fails with "Name or service not known" The documentation does not show that iperf is capable of running with Posted In. iperf3 error exactly 7 seconds into running the test Can you post the packet structure proposed? So I really don't understand the final proposal. I see in the iperf3 code that when the client is connecting to a socket, errno EINPROGRESS is regarded as a successful connection, and that by default the client does not wait for the connection to complete. 10-second test between 192.168.0.20 (client) and 192.168.0.10 (server), 20-second test between 192.168.0.20 (client) and 192.168.0.10 (server), 5. platforms. That will be helpful. (The 2nd solution works for me with fedora 20 and kernel 2.6 and above.). However, the EIP of the ECS can be pinged. If that is the case, then I'd ses a use for incrementing the source stream ID, as that's what distinguishes clients from each other, but not incrementing the destination stream ID as that's how a single listener determines if a client is attempting to connect. However, running iperf -c -B does appear to work. platforms. and Two machines are running windows 10, WSL 2, Ubuntu 20.04. ssh: Could not resolve hostname server: Name or service not known Some examples for bpf based fast drops are here. Why would the Bank not withdraw all of the money for the check amount I wrote? I have not seen this error when running my iperf3 binary as server on Windows, and hitting it it locally with the --bidir option. (http://www.stackoverflow.com/). My thoughts are use a colon so it's --raw [:], Also, we did add support for --incr-dstip which is useful for -P. We may want to generalize that here to something like --incr-dst which would increment the destination streamid. [SOLVED] Ping: google.com: name or service not known / Newbie Corner iPerf just defaults to whatever your routing table tells. That is probably not the right forum, though. Reload to refresh your session. I was still hitting remote systems. Re: the network dumps, yes, I will take some. But I've tried on other machines and it went well without the need of changing anything. Why I failed to compile a sctp program in Linux? @madbrain76, thanks for the detailed info. ping6: 'Name or service not known' when using %iface notation It is very frequent, more than half the time. We will further explore adding a bpf to our prototype. When using multiple sockets, for example -P 64, even if all the calls succeed, it will take about a minute and a half before the test actually starts. Name or service not known. Stack Exchange network consists of 182 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Iperf 2 doesn't have this in the immediate plans. Try using UDP ( -u )? Thank you!! (Although I tried with 3.7 server with no problems.). Browse other questions tagged. 172.30.0.0/22 interface proto kernel scope link src 172.30.0.27, Kernel IP routing table Please note: iperf3 is supported on Linux, FreeBSD, and macOS. You'll neeed to compile master from source after a git pull. Asking for help, clarification, or responding to other answers. This will allow more focused evaluation of the problem. I can't imagine this is what one ever actually want to happen. It requires root privileges. 2: eth0: mtu 1500 qdisc mq state UP group default qlen 1000 There are a lot of things we can do to make this output better, with more meaningful data. In data transmission, TCP sends a certain amount of data and then pauses. Discussions. Reload to refresh your session. So, I don't know if IPv6 is part of the problem or not. Ethertype (2 bytes) inet 10.2.7.4/24 brd 10.2.7.255 scope global eth2 The main reasons I think this is the way to go is both because it may take MS a long time to fix the issue (if at all) and because iperf3 is not officially maintained for Windows. Debugging multicast is non trivial. [ 3] Sent 70564 datagrams b------------------------------------------------------------ The logic is quite messy. If it fails again, kill iperf using the above command and repeat step 1 again. I've tried to compile, but I get: Can you share your config.h? You switched accounts on another tab or window. In other words, change this line in /etc/nsswitch.conf: Where usually hostnames are resolved using the /etc/hosts file and dns, the hostname of the system can also be resolved by telling the Name Service Switch to do so (as this configuration change will do). A list of frequently-asked questions There are several issues about this problem in Windows. Ping issue "Name or service not known" - Red Hat Customer Portal Have ideas from programming helped us create new mathematical proofs. b[ ID] Interval Transfer Bandwidth Jitter Lost/Total bServer listening over raw socket I need to use cmsg SO_PKTINFO to get the actual received interface. I still see the problem with the intermittent getaddrinfo failure, though. Now to use SCTP in iperf these are the proper syntaxes. All Rights Reserved. This issue is also not directly related by may be interesting. Do large language models know what they are talking about? Thus, the further away the two hosts, the longer it takes for the sender to receive the acknowledgment from the remote host, reducing overall throughput. This issue is all too common and it has nothing to do with the network. I'm using iperf3 that is supposedly a rewritten version of iperf. What are the advantages and disadvantages of making types as a first class value? I just didn't manage to get autoconf to output the right debug Makefile. If you would like to refer to this comment somewhere else in this project, copy and paste the following link: 2023 Slashdot Media.