Unable to add ESXi 9.1 host to vCenter after an IP address change

Products

• VMware vSphere ESXi

Issue/Introduction

Unable to add ESXi 9.1 host to vCenter after an IP address change

Environment

ESXi 9.1
VCF 9.1
vCenter 9.1
VCF Operations 9.1
VVF 9.1

Cause

If vCenter cannot talk to the VCF Operations node via API, it will not be able to register the ESXi as it cannot contact the embedded licensing server

Resolution

1. Remove the old ESXi node from vCenter (if it exists)
   Right click the ESXi node and select remove from inventory
2. Verify that the VCF Operations node is online, if the IP was not changed before removing the subnet, you can manually update the IP
   Run:  vi /etc/systemd/network/10-eth0.network.d/ipv4.conf
   Correct the IP using the following example:
   [Network]
   Address=192.168.1.20/24
   Gateway=192.168.1.1
   
   [DHCPv4]
   SendRelease=false

NOTE:  If the VCF Operations instance was not updated to the new IP range while the systems involved still have access to the previous range, the instance will need to be re-deployed and then kb 442494 will need to be followed to reconnect VCF Operations and Licensing server to vCenter.