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