"The following IP/MAC addresses have already been used by running virtual machines" in VMware Cloud Director

Products

• VMware Cloud Director

Issue/Introduction

Power-on operations for a virtual machine fail with the following error message:

"The following IP/MAC addresses have already been used by running virtual machines"

Environment

VMware Cloud Director 10.x

Cause

Stale network interface (NIC) data remains in the database for a virtual machine within the vApp, causing IP and MAC address conflict checks to fail during power-on operations. This conflict check evaluates all virtual machines belonging to the vApp, including those not currently being powered on.

Resolution

 

Execute the resolution steps provided in The following IP/MAC addresses have already been used by running virtual machines.

If the issue persists after following above KB, take a full database backup and snapshot all VMware Cloud Director cells before proceeding with direct database modifications.

1. Power off the affected virtual machine.
   
   
2. Identify the VM ID by running the following database query:

select * from vapp_vm where name like '%<VM_name>%';

     3. Fetch the NIC details for the VM using the NVM ID obtained in step 1:

select * from network_interface where netvm_id = '<nvm_id>';

     4. Delete the conflicting NIC entry executing the following query with the identified nic id obtained from above query:

delete from network_interface where nic_id = '<nic_id>';

     5. Validate the NIC cleanup to ensure only one valid entry exists by running the following query:

select * from deployed_nic_view dnic, all_nic_view anic where dnic.rnet_id = anic.rnet_id and dnic.mac_address = anic.mac_address and anic.sg_id = '<sg_id_from_step2>' and dnic.mac_address = '<mac_address_from_step3>';