CSCwj05500 - c8000v device is not able to load mlx5 driver

[anjanchandra]

Problem Summary: "Accelerated Networking" is disabled due to some unknows reason. 

Impacted Version: C8000v - Cisco IOS XE Software, Version 17.09.02a

Problem Description: We have several devices hosted in Azure which are running C8000v Software. All these VM were commissioned with "Accelerated Networking" enabled. Accelerated Networking was working for all the C8000v devices initially. Somewhere down the line, “Accelerated Networking” was disabled in few of the devices due to some unknown reason. Every time we reboot the device, the “Accelerated Networking” comes back. It looks like whenever Microsoft does a live migration in the Azure environment, the Cisco software are not able to detect it from it's kernel level. We have found some logs related to MLX driver which could the the cause of this.

Reference: Below is the reference document that was followed during the initial VM turnup.

Deploying Cisco Catalyst 8000V Edge Software on Microsoft Azure - Configure Accelerated Networking [Cisco Catalyst 8000V Edge Software] - Cisco

Below is the logs which was generated in the router

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[Ruben Cocheno]

@anjanchandra 

Outch!