# OPKG packages installation: IPERF3 is unknown **URL:** \ **Category:** Networking Solutions\ **Created:** [November 5, 2025, 1:06pm UTC](https://community.teltonika.lt/t/opkg-packages-installation-iperf3-is-unknown/16263 "2025-11-05T13:06:32Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![thin5guniovi](https://community.teltonika.lt/letter_avatar_proxy/v4/letter/t/b9e5f3/32.png) [@thin5guniovi](https://community.teltonika.lt/u/thin5guniovi)\ **Post date:** [November 5, 2025, 1:06pm UTC](https://community.teltonika.lt/t/opkg-packages-installation-iperf3-is-unknown/16263/1 "2025-11-05T13:06:32Z")
Hello, I am currently trying to install _iperf3_ package on my _RUTM52_. However, I have encountered that after running the _opkg install iperf3_ command, the response was _Unknown package ‘iperf3’ Package installation encountered an error, removing previously installed package,_ so I decided to follow the commands indicated in the following issue: > [@Wish: Add package lftp to Teltonika opkg feed](https://community.teltonika.lt/t/wish-add-package-lftp-to-teltonika-opkg-feed/3652): > > Hi, until Firmware 7.6 there was at least the openwrt opkg feed enabled. Now only Teltonika feed (see [Firmware 07.06 missing opkg repositories](https://community.teltonika.lt/t/firmware-07-06-missing-opkg-repositories/3392)) Can you please add lftp or another ftp client as package? We use it a lot for scripting ftp pulls and pushes on the Teltonika routers. I know, now I can/have to manually turn on the OpenWRT opkg feed now. cp /etc/opkg/openwrt/distfeeds.conf /etc/opkg/distfeeds.conf Cheers Torsten Nonetheless, after running the first command _opkg -e /etc/opkg/openwrt/distfeeds.conf update_, I get the following downloading error, and it does not allow me to download _iperf3_ package — obviously. ![error_instalacion_iperf3](https://community.teltonika.lt/uploads/default/original/3X/b/3/b3d19bd21e7d7491d9e4e93b0498d763757a5616.png) I am aware Konrad encountered the same error last year ( [OPKG packages installation - package is unknown - #3 by kchrosto](https://community.teltonika.lt/t/opkg-packages-installation-package-is-unknown/3751/3) ), but they did not indicate the solution for it. Does anyone know what am I doing wrong or what is happening? Best regards, Alba ---
**Author:** ![Matas](https://community.teltonika.lt/user_avatar/community.teltonika.lt/matas/32/17132_2.png) [@Matas](https://community.teltonika.lt/u/Matas)\ **Post date:** [November 6, 2025, 6:42am UTC](https://community.teltonika.lt/t/opkg-packages-installation-iperf3-is-unknown/16263/3 "2025-11-06T06:42:07Z")
Greetings, Interestingly enough, I wasn’t able to replicate your issue as it allowed me to simply **opkg update** → **opkg install iperf3** and that was it: ![image](https://community.teltonika.lt/uploads/default/original/3X/0/f/0f5f880808b6f83ed35f6fc2b7642f090c33ca46.png) Of course, the test was run on a RUTX11 instead of an M52, and the firmware in use was **7.17.5** , but this generally _shouldn’t_ make much of a difference. Could you please confirm that if running these commands in this particular order still returns the error? `opkg update` `opkg install iperf3` Could you also confirm your current firmware version installed on the device? If not at least **7.17.5** , could you kindly upgrade to it? Downloads can be found here: [RUTM52 Firmware Downloads - Teltonika Networks Wiki](https://wiki.teltonika-networks.com/view/RUTM52_Firmware_Downloads) Regards, M. ---
**Author:** ![thin5guniovi](https://community.teltonika.lt/letter_avatar_proxy/v4/letter/t/b9e5f3/32.png) [@thin5guniovi](https://community.teltonika.lt/u/thin5guniovi)\ **Post date:** [November 10, 2025, 8:06am UTC](https://community.teltonika.lt/t/opkg-packages-installation-iperf3-is-unknown/16263/4 "2025-11-10T08:06:47Z")
Hello, Thanks for getting back to me so quickly! The current firmware version installed on my RUTM52 is 7.15.5, the same as yours. I am not sure what happened over the past few days while I was not working with it, but I have just run the commands you suggested, and the error did not appear (just like in Konrad’s case). Regards, Alba ---
**Author:** ![Matas](https://community.teltonika.lt/user_avatar/community.teltonika.lt/matas/32/17132_2.png) [@Matas](https://community.teltonika.lt/u/Matas)\ **Post date:** [November 11, 2025, 6:44am UTC](https://community.teltonika.lt/t/opkg-packages-installation-iperf3-is-unknown/16263/5 "2025-11-11T06:44:11Z")
Thanks for letting us know! Glad that the issue has been resolved. Regards, M. ---
**Author:** ![system](https://community.teltonika.lt/user_avatar/community.teltonika.lt/system/32/15707_2.png) [@system](https://community.teltonika.lt/u/system)\ **Post date:** [January 4, 2026, 1:07pm UTC](https://community.teltonika.lt/t/opkg-packages-installation-iperf3-is-unknown/16263/6 "2026-01-04T13:07:04Z")
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