Modify SCAN IP address

Let us say the scan IP address is modified (without change in subnet mask) then follow these simple steps to reconfigure the scan

1. Add the additional ips to the /etc/hosts (of all hosts) (Optional only when DNS is not configured)
2. $ORACLE_HOME/bin/srvctl modify scan -scanname <scan-name>
   1. This command need to be run as ‘root‘
3. As grid user run:
   1. srvctl modify scan_listener -update
   2. srvctl stop scan_listener
   3. srvctl start scan_listener
   4. srvctl status scan_listener

lsnrctl start fails with TNS-00525: Insufficient privilege for operation

Oracle’s lsnrctl start command failed with below error:

TNS-12555: TNS:permission denied
TNS-12560: TNS:protocol adapter error
TNS-00525: Insufficient privilege for operation
Linux Error: 1: Operation not permitted

Solution is to remove files (socket files) under /var/tmp/.oracle; and retry

More Info: These are the socket files created by the lsnrctl when it runs. To find out what files are used by the failing command run :

> strace -aef lsnrctl status LISTENER 

access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
access("/etc/listener.ora", F_OK)       = -1 ENOENT (No such file or directory)
access("/u02/app/oracle/product/12.1.0/dbhome_1/network/admin/listener.ora", F_OK) = -1 ENOENT (No such file or directory)
access("/u02/app/oracle/product/12.1.0/dbhome_1/network/admin/sqlnet.ora", F_OK) = -1 ENOENT (No such file or directory)
access("/var/tmp/.oracle", F_OK)        = 0
access("/var/tmp/.oracle/s#9102.2", F_OK) = 0