another ouch with the grid infrastructure (tested with 12.1.0.2). steps to reproduce:
1. configure the GI on the first node
2. deconfigure the GI on the first node ( rootcrs.pl -deconfig -force )
3. change the network configuration (ip address) for the privat interconnect
4. configure the GI again => this will fail
the reason is that “rootcrs.pl -deconfig -force” does not delete the gpnp profile. to fix this just delete the profile:
rm -rf [GI_HOME]/gpnp/[NODE_NAME]/
This is somehow documented in mos note 942166.1
Daniel Westermann's Blog 