AIX How to exchange hostname and IP address between two AIX servers?

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http://www.unix.com – Hi all, I am trying to exchange hostname and IP address of two AIX machines. But i am confused as how to change it ? do i need to use "smitty mktcpip" or "smitty tcpip" ? what is the difference between smitty mktcpip and smitty tcpip ? Also anymore steps to follow or just updating using smitty is enough (hoping that no reboot is required) Also below is the procedure i want to use for the whole process of swapping hostname and IP address: 1) remove server A from network and update hostname and IP address (to Server B's hostname and IP) using smitty 2) m (HowTos)