To achieve the objective of bringing down all VLANs on an interface that are not enabled for FCoE while allowing those that are enabled for FCoE to continue carrying SAN traffic, the shutdown force command should be applied to the Ethernet interface. This command ensures that only the non-FCoE VLANs are shut down, and it does not affect the operation of the VLANs carrying FCoE traffic. The shutdown force command is used specifically to override any configurations that might prevent the interface from being shut down, such as EtherChannel or Spanning Tree Protocol (STP) settings.
References: The solution aligns with Cisco's best practices for managing VLANs in a Cisco ACI environment, particularly when dealing with FCoE traffic. For more detailed information, refer to the Cisco documentation on FCoE configurations and VLAN management in the context of Cisco ACI fabrics, which can be found in the Cisco Data Center Core Technologies (DCCOR) study materials and on the Cisco official website under the Data Center and Virtualization section1