When the Performance Manager virtual appliance is first deployed, the network host is assigned a name. You can change the host name after deployment. If you change the host name, you should also regenerate the HTTPS certificate.
You can use the host name (or the host IP address) to access the Performance Manager GUI. If you configured a static IP address for your network during deployment, then you would have designated a name for the network host. If you configured the network using DHCP, the host name should be taken from the DNS. If DHCP or DNS are not properly configured, the host name "OnCommand" is automatically assigned and associated with the security certificate.
Regardless of how the host name was assigned, if you change the host name and intend to use the new host name to access the Performance Manager GUI, you must generate a new security certificate.
If you access the Performance Manager GUI by using the server's IP address instead of the host name, you do not have to generate a new certificate if you change the host name. However, it is the best practice that you do update the certificate, so that the host name in the certificate matches the actual host name.
The new certificate does not take effect until the Performance Manager virtual machine is restarted.