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