Installing RAC encountered ClusterwarePRCT-1302: the OCR has an inva... first introduces the usage of the oifcfg-Oracle Interface Configuration tool. Usage: oifcfg iflist [-p [-n] oifcfg setif {-node <nodename> |-global }{< if_name>/<subnet >:< if_type> }... oifcfg getif [-node <nodename> |-global] [-if <if_name> [/<subnet>] [-type <if_type>] oifcfg delif [-node <nodename> |-global] [<if_name> [/<subnet>] oifcfg [-help] <nodename>-host name known to the Communication Network <if_name>-name of the interface configured in the system <subnet>-interface subnet address <if_type>-interface type {cluster_interconnect | public | storage} T execution: [root @ vmac1 ~] # Oifcfg getif * 192.168.1.0 global public * 172.161.0 global cluster_interconnecteth1 172.161.0 global cluster_interconnecteth0 192.168.1.0 global publicPRIF-29: Warning: wildcard in network parameters can cause mismatch among GPnP profile, OCR, and system [root @ vmac1 ~] # Oifcfg delif-global */172.161.0 [root @ vmac1 ~] # Oifcfg setif-global eth1/172.161.0: cluster_interconnect [root @ vmac1 ~] # Oifcfg delif-global */192.168.1.0 [root @ vmac1 ~] # Oifcfg setif-global eth0/192.168.1.0: public can solve this problem. The specific IP address is changed according to your own situation.