Dear RAC EXperts,
I do NOT have DNS configuration for RAC setup.
Even i do not know how to setup DNS.
I am using /etc/hosts file only.
But why 3 SCAN enabled (3 scan vip and 3 scan listeners are running)
DB & GRID versions are : 11.2.0.3
OS : OL 6.5
>> On Node1
[grid@RAC1 ~]$ srvctl status scan
SCAN VIP scan1 is enabled
SCAN VIP scan1 is running on node rac2
SCAN VIP scan2 is enabled
SCAN VIP scan2 is running on node rac1
SCAN VIP scan3 is enabled
SCAN VIP scan3 is running on node rac1
>>
[grid@RAC1 ~]$ srvctl status scan_listener
SCAN Listener LISTENER_SCAN1 is enabled
SCAN listener LISTENER_SCAN1 is running on node rac2
SCAN Listener LISTENER_SCAN2 is enabled
SCAN listener LISTENER_SCAN2 is running on node rac1
SCAN Listener LISTENER_SCAN3 is enabled
SCAN listener LISTENER_SCAN3 is running on node rac1
>>
[grid@RAC1 ~]$ lsnrctl status listener_scan2
LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 06-FEB-2018 03:35:50
Copyright (c) 1991, 2011, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN2)))
STATUS of the LISTENER
------------------------
Alias LISTENER_SCAN2
Version TNSLSNR for Linux: Version 11.2.0.3.0 - Production
Start Date 05-FEB-2018 18:25:04
Uptime 0 days 9 hr. 10 min. 45 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/product/11.2.0/grid_home/network/admin/listener.ora
Listener Log File /u01/product/11.2.0/grid_home/log/diag/tnslsnr/RAC1/listener_scan2/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER_SCAN2)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.56.52)(PORT=1521)))
Services Summary...
Service "racdb.oracle.com" has 2 instance(s).
Instance "racdb1", status READY, has 1 handler(s) for this service...
Instance "racdb2", status READY, has 1 handler(s) for this service...
Service "racdbXDB.oracle.com" has 2 instance(s).
Instance "racdb1", status READY, has 1 handler(s) for this service...
Instance "racdb2", status READY, has 1 handler(s) for this service...
The command completed successfully
>>
[grid@RAC1 ~]$ lsnrctl status listener_scan3
LSNRCTL for Linux: Version 11.2.0.3.0 - Production on 06-FEB-2018 03:35:53
Copyright (c) 1991, 2011, Oracle. All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN3)))
STATUS of the LISTENER
------------------------
Alias LISTENER_SCAN3
Version TNSLSNR for Linux: Version 11.2.0.3.0 - Production
Start Date 05-FEB-2018 18:25:04
Uptime 0 days 9 hr. 10 min. 48 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/product/11.2.0/grid_home/network/admin/listener.ora
Listener Log File /u01/product/11.2.0/grid_home/log/diag/tnslsnr/RAC1/listener_scan3/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER_SCAN3)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.56.53)(PORT=1521)))
Services Summary...
Service "racdb.oracle.com" has 2 instance(s).
Instance "racdb1", status READY, has 1 handler(s) for this service...
Instance "racdb2", status READY, has 1 handler(s) for this service...
Service "racdbXDB.oracle.com" has 2 instance(s).
Instance "racdb1", status READY, has 1 handler(s) for this service...
Instance "racdb2", status READY, has 1 handler(s) for this service...
The command completed successfully
>>