Background Description:
Assume
I have a 11gR2 RAC with 3 nodes. If I configure 4 scan ip resolved by DNS, which three scan ip would be choosen for scan listener? Does it like below?
4 scan ip in DNS server:
192.168.2.101
192.168.2.102
192.168.2.103
192.168.2.104
The scan listener's ip may be like below:
node1
[grid@rac1 ~]$ lsnrctl status listener_scan1
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER_SCAN1)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.2.101)(PORT=1521)))
node2
[grid@rac2 ~]$ lsnrctl status listener_scan2
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER_SCAN2)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.2.102)(PORT=1521)))
node3
[grid@rac3 ~]$ lsnrctl status listener_scan3
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER_SCAN3)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.2.103)(PORT=1521)))
But it also can be choosen like below
node1
[grid@rac1 ~]$ lsnrctl status listener_scan1
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER_SCAN1)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.2.103)(PORT=1521)))
node2
[grid@rac2 ~]$ lsnrctl status listener_scan2
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER_SCAN2)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.2.102)(PORT=1521)))
node3
[grid@rac3 ~]$ lsnrctl status listener_scan3
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER_SCAN3)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.168.2.104)(PORT=1521)))
and so on .
Above is my guess, so what's the real combination of three ip ?
Pls help me.