Change & Verify Nutanix Controller Virtual Machine Network (VLAN) Placement

In most of my deployments I need to place the Nutanix Node (AHV, ESXi, Hyper-V) and the Nutanix Controller Virtual Machine (CVM) on a non default VLAN. This blog post will cover the CVM part and by following the below steps you can easily place a CVM on a specific VLAN and also verify the configuration

• Verify the CVM VLAN placement by running the below command on the AHV host where the CVM is running:
  • ovs-vsctl show
    
    • Check the section vnet0 and see if there is a line including “tag; X” or not. If the line does not exists the CVM is not using Acropolis VLAN tagging.
• Run the following command on the CVM you want to place on a VLAN
  • change_cvm_vlan <vlanId>
    • In my case I used “change_cvm_vlan 32”
• Verify the configuration by running the ovs-vsctl show command from either the AHV host where the CVM is running or via the CVM by running any of the following commands:
  • ssh root@192.168.5.1 ovs-vsctl show
    
    As you can see we now have a line including “tag: <vlanId>” and in my case I placed the CVM on VLAN 32.
    
    • This command will list the local CVM configuration
  • hostssh ovs-vsctl show
    • This command will list the configuration for all CVM in the Nutanix Cluster.

These commands have been tested and verified on AOS 5.1 and AHV 20160925.44