Mellanox Technologies MT27500 Family [ConnectX-3 and ConnectX-3 Pro devices] adapter stops processing traffic but network adapter link state is still active
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Mellanox Technologies MT27500 Family [ConnectX-3 and ConnectX-3 Pro devices] adapter stops processing traffic but network adapter link state is still active

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Article ID: 317697

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Updated On:

Products

VMware vSphere ESXi

Issue/Introduction

Symptoms:
  • An ESXi host is experiencing full traffic loss
  • All Virtual Machine traffic using a Mellanox adapter stops
  • Mellanox adapter driver is in use nmlx4_en 3.15.11.6 or 3.16.11.6 or 3.17.13.1 or 3.19.16.7 or 3.19.16.8
  • Traffic is not passing over a Mellanox adapter but the link status shows as active
  • Both the vmkernel and VMs go unresponsive on the network
  • Network Card MT27500 Family [ConnectX-3 and ConnectX-3 Pro Devices]
If Mellanox Technologies MT27500 Family [ConnectX-3] devices stop processing traffic when RDMA and Ethernet (TCP) traffic is run in parallel,see: MT27500 Family devices stop processing traffic when RDMA & Ethernet traffic run in parallel

Cause

This is a driver related issue.

Resolution

This issue is resolved in later versions of the driver.
  • nmlx4_en 3.15.11.10 (6.0 driver)
  • nmlx4_en 3.16.11.10 (6.5 driver) 
  • nmlx4_en 3.17.70.1 (6.7 driver)
  • nmlx4_en 3.19.70.1  (7.0 driver)


Additional Information

Customer can flap the port from the upstream switch to resolve issue for a time.

Impact/Risks:
All network traffic can be lost when using this adapter and driver combination.

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