I found a comfortable way of doing this here:
It also allows you to change hostname, DNS, default gateway and proxy.
To sum it up:
- Open a console session of the VCSA
- Login as: root
- Default password is: vmware
- Execute the following command:
/opt/vmware/share/vami/vami_config_net
- After executing the command, a menu is displayed. Within the menu It is possible to change the IP address, hostname, DNS, Default gateway and proxy server.
After allocating a static IP Address to the VCSA, the post configuration can be done by using the following URL:
https://static-ip-address:5480
Creds: http://serverfault.com/questions/459948/how-to-change-vcenter-server-appliance-ip-from-command-line