Installing vsphere client and configuring standalone esxi server.
After configuring network, we need to Install vsphere client from esxi website https://<esxi_server IP or hostname> or Insert vSphere 5.1 suite DVD and select vSphere client from menu to install with default setup. Esxi require this client for further connection. here is the screenshot you cna download vsphere client.
Or you can install it from vcenter iso file also.
Make sure your DNS infrastructure is configured correctly (configured reverse lookup zone), Create A resource records, for esxi01 server for proper name resolution. (Settings on DNS server) try pinging esxi hostname and check if you get repsonse.
Here is how you can configure A record (glue record entry) in dns server.
Launch VMware vsphere client and enter IP address or hostname of Esxi server and enter username root and password.
Ignore the certificate warning.
Congrats, You are in. and can now manage server further and it can be managed graphically using client.