View Issue Details

IDProjectCategoryView StatusLast Update
0017888CentOS-7kernelpublic2020-11-30 20:35
Status newResolutionopen 
PlatformPowerEdge R640OSCentOSOS Version7.9
Product Version7.9.2009 
Target VersionFixed in Version 
Summary0017888: Mellanox MT27710 [ConnectX-4 Lx] NICs unuseable after upgrade to 3.10.0-1160.6.1.el7
DescriptionNo traffic is detected on the NIC. Works consistently after rolling back to 3.10.0-1160.2.1.el7. Link seems to go down briefly and then seen coming up again. All other dmesg output matches exactly between kernels. the Nic uses the mlx5_core driver
Additional InformationDid notice these changes in 1160.3.1 :

- [netdrv] net/mlx5e: Modify uplink state on interface up/down (Alaa Hleihel) [1733181]
- [netdrv] net/mlx5: E-Switch, Disable esw manager vport correctly (Alaa Hleihel) [1733181]
- [netdrv] net/mlx5: E-Switch, Properly refer to host PF vport as other vport (Alaa Hleihel) [1733181]
TagsNo tags attached.




2020-11-25 21:53

manager   ~0037996

CentOS is a rebuild of the sources used to create RHEL and aims to reproduce RHEL bug for bug and feature for feature. Please file a ticket against the kernel package at and let them know about the regression. If/when RH fixes it and releases a patched version, CentOS will pick it up automatically.
For easier tracking, please crosslink this bug with the one opened at


2020-11-29 21:56

reporter   ~0038010

@manuelwolfshant I'm not sure how to crosslink ,but the redhat bugzilla id is 1902516


2020-11-30 20:35

reporter   ~0038014

Addendum : This seems to only affect mellanox cards with fw < 14.20. Anything that version and higher works fine

Issue History

Date Modified Username Field Change
2020-11-25 20:13 anish New Issue
2020-11-25 21:53 ManuelWolfshant Note Added: 0037996
2020-11-29 21:56 anish Note Added: 0038010
2020-11-30 20:35 anish Note Added: 0038014