The consequences of changing interface names depend on which name you are changing, and whether you are also changing the IP address. In cases where you are only changing the interface names, the consequences are minor. If you change the name for the public interface that is stored in OCR, then you also must modify the node applications for the cluster. Therefore, you must stop the node applications for this change to take effect.
See Also:
My Oracle Support (formerly OracleMetaLink) note 276434.1 for more details about changing the node applications to use a new public interface name, available at the following URL:
https://metalink.oracle.com