You need to change the VIP addresses inside the CRS itself, and bring them down and up. Simply reconfiguring the ethernet interfaces will not do what you need. If you google for "change oracle rac vip address", the first three hits are all exactly what you are looking for. Matt -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx on behalf of Ram Srinivasan Sent: Mon 11/16/2009 11:18 AM To: oracle-l@xxxxxxxxxxxxx Subject: VIP address change on the RAC servers. All: We have 4 nodes in the RAC cluster. 10gR2 . OS = -- SunOS xxx..xxx.xxx 5.10 Generic_141414-08 sun4u sparc SUNW,SPARC-Enterprise The sysadmins are planning to change the vip addresses on all the nodes/boxes. If they do this, do we have to re-install the crs again on all the nodes? What are the procedures or documentations to follow, after the vip addresses are changed on nodes? Your advice/suggestions will be highly appreciated. With thanks. Sincerely Ram Srinivasan