Change IP of nodes in Oracle RAC I have a two node RAC database running in OEL 7 server. If there is a need to change the IP addresses of the already running server to a new one, will that hamper the functioning of the database?

What changes on the database front would I need to incorporate to implement this? 

Is it even possible in the first place to run the database after changing the IPs?
The database does not care about the IP addresses. Grid Infrastructure does. The method to change the IP addresses can be found in detail in the below MOS notes:

How to Modify Public Network Information including VIP in Oracle Clusterware (Doc ID 276434.1)

How to Modify Private Network Information in Oracle Clusterware (Doc ID 283684.1)