11Gr2 RAC 修改scan IP

11Gr2环境需要更改scan ip, 基本的原理就是更改DNS或者hosts文件内的IP地址，然后通过srvctl 命令去同步CRS内的信息，完成scan ip的修改。 Before, need modify all the node /etc/hosts, set the new ip address. 1. Stop the SCAN listener and the SCAN V

11Gr2环境需要更改scan ip, 基本的原理就是更改DNS或者hosts文件内的IP地址，然后通过srvctl 命令去同步CRS内的信息，完成scan ip的修改。

Before, need modify all the node /etc/hosts, set the new ip address.

1.
Stop the SCAN listener and the SCAN VIP resources:

2.需要先停止服务，测试时候由于没有停止服务，最后出现scan listener没有启动，后手动启动，同时parameter remote_listener值丢失，重新设置的。
# $GRID_HOME/bin/srvctl stop scan_listener
# $GRID_HOME/bin/srvctl stop scan
# $GRID_HOME/bin/srvctl status scan

SCAN VIP scan1 is enabled 
SCAN VIP scan1 is not running 

# $GRID_HOME/bin/srvctl status scan_listener

SCAN Listener LISTENER_SCAN1 is enabled 

SCAN listener LISTENER_SCAN1 is not running  

3.
# To check the current IP address(es) of the SCAN VIPs, run the following commands as the root user:
$GRID_HOME/bin/srvctl config scan

SCAN name: qr01-scan, Network: 1/192.0.2.0/255.255.255.0/eth0 
SCAN VIP name: scan1, IP: /qr01-scan.example.com/192.0.2.21 

4.
# Next refresh the SCAN VIPs with the new IP addresses from the DNS entry:
$GRID_HOME/bin/srvctl modify scan -n
5.
# To check if the SCAN VIPs have been changed, run the following command, it should now show the new IP addresses.
$GRID_HOME/bin/srvctl config scan

SCAN name: qr01-scan, Network: 1/192.0.2.0/255.255.255.0/eth0 
SCAN VIP name: scan1, IP: /qr01-scan.example.com/192.0.2.31 

6.
Start SCAN and the SCAN listener:
# $GRID_HOME/bin/srvctl start scan
# $GRID_HOME/bin/srvctl start scan_listener
7.
check parameter
SQL> show parameter remote

NAME                                 TYPE        VALUE 
------------------------------------ ----------- ------------------------------ 
remote_listener                      string      qr01-scan:1521 

8.
check listener status

$ps -ef|grep tns

oracle    4992     1  0 16:12 ?        00:00:00 /u01/app/11.2.0/grid/bin/tnslsnr LISTENER_SCAN1 -inherit 
oracle    5004     1  0 16:12 ?        00:00:00 /u01/app/11.2.0/grid/bin/tnslsnr LISTENER -inherit 
oracle    9816  5529  0 17:45 pts/0    00:00:00 grep tns 

需要到grid用户下执行下面命令
$lsnrctl status LISTENER_SCAN1

LSNRCTL for Linux: Version 11.2.0.2.0 - Production on 07-MAY-2012 17:46:25 
 
Copyright (c) 1991, 2010, Oracle.  All rights reserved. 
 
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=LISTENER_SCAN1))) 
STATUS of the LISTENER 
------------------------ 
Alias                     LISTENER_SCAN1 
Version                   TNSLSNR for Linux: Version 11.2.0.2.0 - Production 
Start Date                07-MAY-2012 12:12:11 
Uptime                    0 days 1 hr. 34 min. 14 sec 
Trace Level               off 
Security                  ON: Local OS Authentication 
SNMP                      OFF 
Listener Parameter File   /u01/app/11.2.0/grid/network/admin/listener.ora 
Listener Log File         /u01/app/11.2.0/grid/log/diag/tnslsnr/qr01db02/listener_scan1/alert/log.xml 
Listening Endpoints Summary... 
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=LISTENER_SCAN1))) 
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=192.0.2.31)(PORT=1521))) 
Services Summary... 
Service "dbm.example.com" has 2 instance(s). 
  Instance "dbm1", status READY, has 1 handler(s) for this service... 
  Instance "dbm2", status READY, has 1 handler(s) for this service... 
Service "dbmXDB.example.com" has 2 instance(s). 
  Instance "dbm1", status READY, has 1 handler(s) for this service... 
  Instance "dbm2", status READY, has 1 handler(s) for this service... 
The command completed successfully