# \#mlxlink **URL:** https://forums.developer.nvidia.com/tag/mlxlink/687.md [Latest](https://forums.developer.nvidia.com/latest.md) · [Categories](https://forums.developer.nvidia.com/categories.md) · [Tags](https://forums.developer.nvidia.com/tags.md) --- ## [Does CX-7 supports lower speed rate?](https://forums.developer.nvidia.com/t/does-cx-7-supports-lower-speed-rate/350231)
**Author:** [@attdone](https://forums.developer.nvidia.com/u/attdone)\ **Replies:** 3\ **Last updated:** [November 18, 2025, 7:23am UTC](https://forums.developer.nvidia.com/t/does-cx-7-supports-lower-speed-rate/350231 "2025-11-18T07:23:26Z")
Hi team, I am using MCX75310AAC-NEAT hardware, in Precision 3680 PC with Ubuntu 22.04 OS. Does this hardware support 200G speed? Other lower speed rates? or is it fixed to 400G? ~$ sudo mlxlink -d /dev/mst/mt4129\_pcic… --- ## [No link detected with ConnectX-4 Lx](https://forums.developer.nvidia.com/t/no-link-detected-with-connectx-4-lx/313224)
**Author:** [@ebert86](https://forums.developer.nvidia.com/u/ebert86)\ **Replies:** 1\ **Last updated:** [March 25, 2025, 10:15am UTC](https://forums.developer.nvidia.com/t/no-link-detected-with-connectx-4-lx/313224 "2025-03-25T10:15:59Z")
Hi there! I recently bought my first fiber network card, the Mellanox ConnextX-4 Lx EN for my PC and two SFP28 modules from fs.com to connect with my Mikrotik CCR2004 router. Not sure if it matters but the cable I used … --- ## [How to properly disable ConnectX-7 auto-negotiation and force port settings?](https://forums.developer.nvidia.com/t/how-to-properly-disable-connectx-7-auto-negotiation-and-force-port-settings/320045)
**Author:** [@dan.hartman](https://forums.developer.nvidia.com/u/dan.hartman)\ **Replies:** 1\ **Last updated:** [March 1, 2025, 12:54am UTC](https://forums.developer.nvidia.com/t/how-to-properly-disable-connectx-7-auto-negotiation-and-force-port-settings/320045 "2025-03-01T00:54:08Z")
How to properly DISABLE ConnectX-7 auto-negotiation and force port settings? I need to disable specifically for my configuration.. (whole other story) set mst\_dev=“/dev/mst/mt4129\_pciconf1” Using RHEL8.8 hardware conf… --- ## [Mlxlink - Bad signal integrity on Mellanox ConnectX-4 LX](https://forums.developer.nvidia.com/t/mlxlink-bad-signal-integrity-on-mellanox-connectx-4-lx/299434)
**Author:** [@emb3](https://forums.developer.nvidia.com/u/emb3)\ **Replies:** 1\ **Last updated:** [August 16, 2024, 1:29am UTC](https://forums.developer.nvidia.com/t/mlxlink-bad-signal-integrity-on-mellanox-connectx-4-lx/299434 "2024-08-16T01:29:03Z")
I am using Ubuntu 18.04.6, Kernel 5.4.0-150-generic, x86\_64 system. Below are the commands I used, results I got: lspci -v | grep Mellanox 01:00.0 Ethernet controller: Mellanox Technologies MT27710 Family \[ConnectX-4 Lx… --- ## [Inquiry Regarding mlxlink Utility Command and Connection Stability Assessment Methods](https://forums.developer.nvidia.com/t/inquiry-regarding-mlxlink-utility-command-and-connection-stability-assessment-methods/301102)
**Author:** [@emb3](https://forums.developer.nvidia.com/u/emb3)\ **Replies:** 1\ **Last updated:** [July 30, 2024, 4:18pm UTC](https://forums.developer.nvidia.com/t/inquiry-regarding-mlxlink-utility-command-and-connection-stability-assessment-methods/301102 "2024-07-30T16:18:03Z")
I am seeking detailed information regarding the mlxlink utility command provided by Mellanox. Specifically, I would like to understand the following aspects: What functionality does the mlxlink utility command offer? D… --- ## [Bug in display of port information on MQM9700 switch](https://forums.developer.nvidia.com/t/bug-in-display-of-port-information-on-mqm9700-switch/296176)
**Author:** [@mooyu](https://forums.developer.nvidia.com/u/mooyu)\ **Replies:** 1\ **Last updated:** [June 17, 2024, 12:23pm UTC](https://forums.developer.nvidia.com/t/bug-in-display-of-port-information-on-mqm9700-switch/296176 "2024-06-17T12:23:38Z")
If I read the information for port 2 on the same cage of the 9700 series switch, it will always display the information for port 1. The most obvious example is if port 1 does not have a cable inserted, port 2 will show a… --- ## [No used of 'mlxlink -d \ --cable --write'](https://forums.developer.nvidia.com/t/no-used-of-mlxlink-d-device-cable-write/278306)
**Author:** [@granger](https://forums.developer.nvidia.com/u/granger)\ **Replies:** 1\ **Last updated:** [January 11, 2024, 5:53am UTC](https://forums.developer.nvidia.com/t/no-used-of-mlxlink-d-device-cable-write/278306 "2024-01-11T05:53:03Z")
how I should use this CLI?? use the ‘mlxlink -d --cable --read’ it can used: and I use the ‘mlxlink -d --cable --write’ it seems done. then I read back, it don’t used: --- ## [What's meaning of Status Opcode 529](https://forums.developer.nvidia.com/t/whats-meaning-of-status-opcode-529/278305)
**Author:** [@granger](https://forums.developer.nvidia.com/u/granger)\ **Replies:** 1\ **Last updated:** [January 10, 2024, 2:57am UTC](https://forums.developer.nvidia.com/t/whats-meaning-of-status-opcode-529/278305 "2024-01-10T02:57:06Z")
I have a 200G-2x100G split AOC use on QM8790, and the interface couldn’t up. mlxlink feedback: Status Opcode : 529 I didn’t know what the problem indeep and even didn’t find the Opcode explain list. … --- ## [Link Down between ConnectX6-Dx and Cisco Nexus 5624Q](https://forums.developer.nvidia.com/t/link-down-between-connectx6-dx-and-cisco-nexus-5624q/272615)
**Author:** [@taekyounghan](https://forums.developer.nvidia.com/u/taekyounghan)\ **Replies:** 2\ **Last updated:** [November 14, 2023, 1:38am UTC](https://forums.developer.nvidia.com/t/link-down-between-connectx6-dx-and-cisco-nexus-5624q/272615 "2023-11-14T01:38:36Z")
Hello I am currently having difficulty activating the link between the ConnectX6 Dx and the Cisco Switch (Nexus 5624Q). At first I thought it was an auto-negotiation issue, so I manually set the link speed and duplex o… --- ## [How can i change to ib card speed from IB-SDR to IB-QDR?](https://forums.developer.nvidia.com/t/how-can-i-change-to-ib-card-speed-from-ib-sdr-to-ib-qdr/206512)
**Author:** [@dlwoals77](https://forums.developer.nvidia.com/u/dlwoals77)\ **Replies:** 2\ **Last updated:** [March 20, 2020, 9:02pm UTC](https://forums.developer.nvidia.com/t/how-can-i-change-to-ib-card-speed-from-ib-sdr-to-ib-qdr/206512 "2020-03-20T21:02:50Z")
Hi I am using mellanox connect-x5 nic card and connect to IB-switch of exadata. But connected only IB-SDR(10G) . We try to change port speed in IB switch of commands, but port down… switch commands ( no change IB car… --- ## [100GbE cable not communicating with Cisco 9508](https://forums.developer.nvidia.com/t/100gbe-cable-not-communicating-with-cisco-9508/206705)
**Author:** [@james.ault](https://forums.developer.nvidia.com/u/james.ault)\ **Replies:** 13\ **Last updated:** [October 22, 2019, 5:22pm UTC](https://forums.developer.nvidia.com/t/100gbe-cable-not-communicating-with-cisco-9508/206705 "2019-10-22T17:22:53Z")
We have a Cisco 9508 switch, with 100Gb line cards and Mellanox MCX515A-CCAT Interface cards, and cables: MFA1A00–C010. The Cable fails to work and the issue follows the cable when swapping between two hosts at the Host… --- ## [I would like to do ShareIO with ConnectX-5 MT27800 between two servers, but, the second server which has Auxiliary Card installed cannot be ping by other server.](https://forums.developer.nvidia.com/t/i-would-like-to-do-shareio-with-connectx-5-mt27800-between-two-servers-but-the-second-server-which-has-auxiliary-card-installed-cannot-be-ping-by-other-server/206728)
**Author:** [@giang.nguyen](https://forums.developer.nvidia.com/u/giang.nguyen)\ **Replies:** 6\ **Last updated:** [September 3, 2019, 5:37pm UTC](https://forums.developer.nvidia.com/t/i-would-like-to-do-shareio-with-connectx-5-mt27800-between-two-servers-but-the-second-server-which-has-auxiliary-card-installed-cannot-be-ping-by-other-server/206728 "2019-09-03T17:37:41Z")
Informations of he first server : \[root@node305 ~\]# lspci | grep -i mellanox 06:00.0 Infiniband controller: Mellanox Technologies MT27800 Family \[ConnectX-5\] 06:00.1 Infiniband controller: Mellanox Technologies MT2780… --- ## [Trouble getting CX416A 100G link up](https://forums.developer.nvidia.com/t/trouble-getting-cx416a-100g-link-up/206940)
**Author:** [@system](https://forums.developer.nvidia.com/u/system)\ **Replies:** 2\ **Last updated:** [January 21, 2019, 9:48pm UTC](https://forums.developer.nvidia.com/t/trouble-getting-cx416a-100g-link-up/206940 "2019-01-21T21:48:42Z")
We have a 2x100G NIC from Mellanox, but we haven’t been able to establish a link against our 100G switch ports. Our test scenario is very simple. It looks like this: PC Mellanox 100G port \<-------\> 100G Direct Attach Co…