- Changing Private IP Addresses 11G R2 OCR / VD on ASM --

By Bill Toranto

I recently encountered this issue and thought everyone should be aware of it.


If any re IP-ing is to take place in your 11G R2 RAC clusters (mainly the Private IP), the Grid / CRS OCR needs to be updated prior to anything being done on the host. The ASM instance needs to be available in order for the OCR to be accessible.

IF the host is re IP-ed first, the Grid will need to be re installed using the new private IP address, since ASM will not mount & the OCR inaccessible.

Oracle does expect to have a fix for this very soon since they are getting a large number of reported issues related to this, and ASM OCR’s a relatively new implementation.

This may seem fundamental, but putting the OCR on ASM is a fairly new practice for most of us and previously could be modified after the host ip’s were modified since we used RAW devices.