Cisco UCS supports Consistent Device Naming CDN in ESXi 6.7

Cisco introduced Consistent Device Naming in Cisco UCS Manager Release 2.2(4).

In the past I could saw that VMware vNIC placement order not adhered to Cisco UCS configuration. But his issue will not be seen in the latest ESXi updates – ESXi 6.5 U2 and ESXi 6.7 U1.

How VMware ESXi determines the order in which names are assigned to devices (2091560)

When there is no mechanism for the Operating System to label Ethernet interfaces in a consistent manner. It becomes difficult to manage network connections with server configuration changes.

Allows Ethernet interfaces to be named in a consistent manner. This makes Ethernet interface names more persistent when adapter or other configuration changes are made.

To configure CDN for a vNIC, do the following:

This makes Ethernet interface names more uniform, easy to identify, and persistent when adapter or other configuration changes are made.

 set consistent-device-name-control cdn-name

Whether consistent device naming is enabled or not. This can be one of the following:

  • enabled—Consistent device naming is enabled for the BIOS policy. This enables Ethernet interfaces to be named consistently.
  • disabled—Consistent device naming is disabled for the BIOS policy.
  • platform-default—The BIOS uses the value for this attribute contained in the BIOS defaults for the server type and vendor.

Author: Daniel Micanek

Senior Service Architect, SAP Platform Services Team at TietoEVRY vExpert 2020 | VCIX6.5-DCV | VCP6.5-DCV | VCP-NV 2019 | NCIE-DP and OCP.