Hi Tinnakorn,

Assuming that you are asking w.r.t UCCX 7.0,

Refer to :

Cisco Unified CCX Administration Guide, Release 7.0(1) :
http://www.cisco.com/en/US/docs/voice_ip_comm/cust_contact/contact_center/crs/express_7_0/configuration/guide/uccx70ag.pdf

Pls follow the steps mentioned under section "Modifying Unified CCX IP Address Information (Page 327).".

Run postinstall.exe to configure ur CAD tp point to new IP address of CCX nodes.

And then, you are done. Its pretty simple and similar to the one that you know regarding modifying address for single node. But here, you need to perform this for all nodes.

Hope this clarifies. Good luck.

Regards,
Soman Nair.
(Pls rate if this helps)