swapping network info for 2 iseries

We have two iseries (520,720). 520 is production, 720 is TEST.

I need to swap network information for these two boxes since the 720 will become the production box.

They are defined as:

520
System Name: PROD
default location name: PROD
Local control point name: PROD
Network server domain: PROD
TCP Interface: 11.0.0.2 / 255.255.255.0

720
System Name: TEST
default location name: TEST
Local control point name: TEST
Network server domain: TEST
TCP Interface: 11.0.0.93 / 255.255.255.0

is CHGTCP and CHGNETA the only things i need to do, or is there more?

also, does it make a difference which system i do first and do i have to reboot to have change take effect?