Installing RAC Oracle Database 11.2.0.3 software only when GI is only 11.2.0.1
We know that db 11.2.0.3 is not supported on 11.2.0.1 GI. We understand this that we cannot run 11.2.0.3 databases with lower version of GI. Thats fine.
What about the case when only 11.2.0.3 software needs to be installed without actually running it. This is useful when we do GI upgrade from 11.2.0.1 - 11.2.0.3, to safe time we would like to install 11.2.0.3 db before GI migration.
When we try to install software only 11.2.0.3 with GI 11.2.01, the OUI does check in the middle of installation, and blames that inconsistent version found. You cannot skip this alert message.
The question: is there any science about this, why software only 11.2.0.3 cannot be installed on lower GI?