Changing IP address of the system

Hi Readers,

I had kept busy for a while so could not blog in meanwhile. Now, the latest challenge in my work place is to get one of our iSeries system moved to another data center. This machine will have to moved to its assigned data center via another place. So, we might have to change its IP address and work with data mirror IP address change twice before we settle this.

Since, I would connect to it remotely and won't have any physical connection, we have things to clarify before we go ahead and do it.

In IBM TCP-IP, we can add the new IP address before we shut down the system and after it is relocated to it destination, we can remove the old IP address and connect to the new one. So, how to get this done. Here is a set of procedure for it.

The following are steps to change a TCP/IP address on IBM OS/400 or IBM i5/OS:
    1.
    On an operating system command line, type the following:
   
    CFGTCP
   
    Press the Enter key, and select Option 1.
    2.
    Select Option 10 to end the Interface.
    3.
    Press F12 to get back to the Configure TCP menu.
    4.
    Select Option 2 to work with routes.
    5.
    If there is a route that is associated with the interface, it will need to be removed.  Otherwise, you will get an error later when trying to remove the old TCP/IP address.  (Press F6 to print this screen.  It will go to your spooled file so you can have a record of it.)
    6.
    Once the route is removed, press F12 to return to the configure TCP screen.
    7.
    Select Option 1 to work with TCP interfaces.
    8.
    Select Option 1 to add the new TCP/IP address.
    9.
    Select Option 9 to start the new TCP/IP address.
    10.
    Select Option 4 to remove the old TCP/IP address.
    11.
    Press F11 and the new TCP/IP address should be in an active status.
    12.
    Press F12 to get to the Configure TCP/IP menu.
    13
    Select Option 2 to work with TCP/IP routes.
    14.
    Select Option 1 to add a route if needed.
    15.
    Press F12 to get to the Configure TCP/IP menu.
    16.
    Select Option 10 to work with the Host Table.  If you have the old TCP/IP address associated with the Host Name of the iSeries family system, you must remove the old address, then add a Host Name with the new TCP/IP address.  If you do not have anything there, then you do not have to do anything.
    17.
    Press F12 to get to the Configure TCP/IP menu again.
    18.
    Select Option 12 to change TCP/IP Domain.  If the TCP/IP address of a Domain name server changes too, you will change it here.  If you do not have an external Domain name server, then you will not need to make any changes.
    19.
    Your PCs should now be able to connect to the new TCP/IP address on OS/400 or i5/OS.
   
Similarly, we can change the IP address in data mirror. Since, we are using icluster, we have option to add the new IP address. Just before, shuting the system, we can change the IP address and then shut the system down for shipping.