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How to Change the IP Address of a vCenter Server Appliance

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Read this guide to learn how to modify the IP address of a vCenter Server Appliance Server (VCSA) via the vCenter Server Management web client.

Step 1: Update the VCSA’s DNS Host A Record

Sign in to the DNS server you created the vCenter Server Appliance’s host A record and open the DNS Management console.
Then, select the DNS forward lookup zone name, locate the Host A record, right-click it, and select Properties.

Then, select the DNS forward lookup zone name, locate the Host A record, right-click it, and select Properties.

Finally, modify the IP address and click OK.

Finally, modify the IP address and click OK.

Finally, modify the IP address and click OK - image 2

Step 2: Modify the VCSA’s IP Address

Enter the VCSA’s FQDN on a browser on port 5480. Mine is shown below:

https://ipmvcsa.corp.itechguides.com:5480/

Then, on the sign in page, enter the root credentials of the vCenter Server appliance.

Then, on the sign in page, enter the root credentials of the vCenter Server appliance.

Once signed in, click the Networking node and then EDIT. This opens the “Edit Network Settings” wizard.

Once signed in, click the Networking node and then EDIT.

On the first page of the wizard, select the interface to edit and click Next.

On the first page of the wizard, select the interface to edit and click Next.

Expand the net adapter. Then, change the VCSA’s IP address and click Next.

I changed the IP address of my lab VCSA from 192.168.0.153 to 192.168.0.110

Then, change the VCSA's IP address and click Next.

Enter the SSO credentials for the vCenter Server appliance.

Enter the SSO credentials for the vCenter Server appliance.

Finally, acknowledge the downtime notice and click FINISH to reconfigure the IP address.

Finally, acknowledge the downtime notice and click FINISH to reconfigure the IP address.

The IP address change will start. According to the notification on the page, “Avoid refreshing your web browser to ensure a successful network upgrade.”

When the page displays, “Unable to connect to the vCenter server,” click the CLOSE button.

The main page will display updates trying to resolve the network details of the VCSA.

While this is going on, proceed to step 3 below.

Step 3: Update DNS Cache on Client Computers

Open cmd or PowerShell as administrator and run the following commands:

IPConfig /flushDNS
IPConfig /registerDNS

After that, ping the VCSA’s name continuously to confirm when it’s IP has changed and it is back online with the new IP address.

ping -t ipmvcsa

If the appliance replies with the new IP address, it means that the IP address has been successfully updated.

Open the vCenter URL with its FQDN and sign in as normal. If it does not open on the same browser, try clearing the browser’s cache.

Alternatively, if you have another browser on the PC, use it instead.

Step 4: Reconnect the ESXi Hosts

After signing in to vCenter, the ESXi hots may display “Not responding”. To reconnect each host right-click it, point to Connection, and select Connect.

To reconnect each host right-click it, point to Connection, and select Connect.

Follow the wizard to reconnect the ESXi host to vCenter.

Conclusion

Modifying the IP address of a vCenter server is a two-step process. The first step is to update the VCSA’s Host A record in DNS.

After that, update the appliance’s IP address via the vCenter Server Management web console.

Finally, refresh your PC’s DNS cache and sign in to the appliance’s web console.

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