安装oracle11g r2 RAC时遭遇无法启动scan ip的错误（crs-5005）

1.环境信息：

数据库：11.2.0.4 RAC

OS：Centos 6.8

2.问题描述：

今天在虚拟机上安装一个11g的RAC 玩玩，节点1执行root是没有问题，在节点2上执行时就报了以下这个错误：

Entries will be added to the /etc/oratab file as needed by

Database Configuration Assistant when a database is created

Finished running generic part of root script.

Now product-specific root actions will be performed.

Using configuration parameter file: /u01/app/grid/product/11.2.0/grid_1/crs/install/crsconfig_params

User ignored Prerequisites during installation

Installing Trace File Analyzer

PRKO-2190 : VIP exists for node rac2, VIP name rac2-vip

PRCS-1037 : Single Client Access Name VIPs already exist

PRCS-1028 : Single Client Access Name listeners already exist

OC4J could not be created as it already exists

PRCR-1086 : resource ora.oc4j is already registered

PRCR-1086 : resource ora.cvu is already registered

PRCR-1079 : Failed to start resource ora.scan1.vip

CRS-5017: The resource action "ora.scan1.vip start" encountered the following error:

CRS-5005: IP Address: 192.168.180.6 is already in use in the network

. For details refer to "(:CLSN00107:)" in "/u01/app/grid/product/11.2.0/grid_1/log/rac2/agent/crsd/orarootagent_root/orarootagent_root.log".
CRS-2674: Start of 'ora.scan1.vip' on 'rac2' failed

CRS-2632: There are no more servers to try to place resource 'ora.scan1.vip' on that would satisfy its placement policy
start scan ... failed

FirstNode configuration failed at /u01/app/grid/product/11.2.0/grid_1/crs/install/crsconfig_lib.pm line 9379.

/u01/app/grid/product/11.2.0/grid_1/perl/bin/perl -I/u01/app/grid/product/11.2.0/grid_1/perl/lib -I/u01/app/grid/product/11.2.0/grid_1/crs/install /u01/app/grid/product/11.2.0/grid_1/crs/install/rootcrs.pl execution failed

[root@rac2 app]#
于是在网上查找资料，很多人在安装的时候遇到过这种情形，但是却没查到是如何解决的，有的人干脆重新安装，
在网上和咨询别人无果的情况下，自己就试着重新执行一边root，居然这次执行成功了，以下是我的操作步骤：
a）首先在节点2上把 crs关掉
[root@rac2 ~]# /u01/app/grid/product/11.2.0/grid_1/bin/crsctl stop crs -f

CRS-2791: Starting shutdown of Oracle High Availability Services-managed resources on 'rac2'

CRS-2673: Attempting to stop 'ora.crsd' on 'rac2'

CRS-2790: Starting shutdown of Cluster Ready Services-managed resources on 'rac2'

CRS-2673: Attempting to stop 'ora.OCR_VOTING.dg' on 'rac2'

CRS-2673: Attempting to stop 'ora.rac2.vip' on 'rac2'

CRS-2677: Stop of 'ora.rac2.vip' on 'rac2' succeeded

CRS-2677: Stop of 'ora.OCR_VOTING.dg' on 'rac2' succeeded

CRS-2673: Attempting to stop 'ora.asm' on 'rac2'

CRS-2677: Stop of 'ora.asm' on 'rac2' succeeded

CRS-2673: Attempting to stop 'ora.ons' on 'rac2'

CRS-2677: Stop of 'ora.ons' on 'rac2' succeeded

CRS-2673: Attempting to stop 'ora.net1.network' on 'rac2'

CRS-2677: Stop of 'ora.net1.network' on 'rac2' succeeded

CRS-2792: Shutdown of Cluster Ready Services-managed resources on 'rac2' has completed

CRS-2677: Stop of 'ora.crsd' on 'rac2' succeeded

CRS-2673: Attempting to stop 'ora.crf' on 'rac2'

CRS-2673: Attempting to stop 'ora.ctssd' on 'rac2'

CRS-2673: Attempting to stop 'ora.evmd' on 'rac2'

CRS-2673: Attempting to stop 'ora.asm' on 'rac2'

CRS-2673: Attempting to stop 'ora.mdnsd' on 'rac2'

CRS-2677: Stop of 'ora.crf' on 'rac2' succeeded

CRS-2677: Stop of 'ora.evmd' on 'rac2' succeeded

CRS-2677: Stop of 'ora.mdnsd' on 'rac2' succeeded

CRS-2677: Stop of 'ora.asm' on 'rac2' succeeded

CRS-2673: Attempting to stop 'ora.cluster_interconnect.haip' on 'rac2'

CRS-2677: Stop of 'ora.cluster_interconnect.haip' on 'rac2' succeeded

CRS-2677: Stop of 'ora.ctssd' on 'rac2' succeeded

CRS-2673: Attempting to stop 'ora.cssd' on 'rac2'

CRS-2677: Stop of 'ora.cssd' on 'rac2' succeeded

CRS-2673: Attempting to stop 'ora.gipcd' on 'rac2'

CRS-2677: Stop of 'ora.gipcd' on 'rac2' succeeded

CRS-2673: Attempting to stop 'ora.gpnpd' on 'rac2'

CRS-2677: Stop of 'ora.gpnpd' on 'rac2' succeeded

CRS-2793: Shutdown of Oracle High Availability Services-managed resources on 'rac2' has completed

CRS-4133: Oracle High Availability Services has been stopped.

b）确定crs已经关掉之后，再次执行root脚本

root@rac2 app]# /u01/app/grid/product/11.2.0/grid_1/root.sh

Performing root user operation for Oracle 11g
The following environment variables are set as:

    ORACLE_OWNER= grid

    ORACLE_HOME=  /u01/app/grid/product/11.2.0/grid_1
Enter the full pathname of the local bin directory: [/usr/local/bin]:

The contents of "dbhome" have not changed. No need to overwrite.

The contents of "oraenv" have not changed. No need to overwrite.

The contents of "coraenv" have not changed. No need to overwrite.
Entries will be added to the /etc/oratab file as needed by

Database Configuration Assistant when a database is created

Finished running generic part of root script.

Now product-specific root actions will be performed.

Using configuration parameter file: /u01/app/grid/product/11.2.0/grid_1/crs/install/crsconfig_params

User ignored Prerequisites during installation

Installing Trace File Analyzer

Adding Clusterware entries to upstart

PRKO-2190 : VIP exists for node rac2, VIP name rac2-vip

PRCS-1037 : Single Client Access Name VIPs already exist

PRCS-1028 : Single Client Access Name listeners already exist

OC4J could not be created as it already exists

PRCR-1086 : resource ora.oc4j is already registered

PRCR-1086 : resource ora.cvu is already registered

PRCC-1014 : scan1 was already running

PRCR-1004 : Resource ora.scan1.vip is already running

PRCR-1079 : Failed to start resource ora.scan1.vip

CRS-5702: Resource 'ora.scan1.vip' is already running on 'rac2'
Configure Oracle Grid Infrastructure for a Cluster ... succeeded

发现scan-ip起来了，虽然上面有个报错
[grid@rac2 ~]$ crs_stat -t -v

Name           Type           R/RA   F/FT   Target    State     Host       

----------------------------------------------------------------------

ora....N1.lsnr ora....er.type 0/5    0/0    ONLINE    ONLINE    rac2       

ora....TING.dg ora....up.type 0/5    0/     ONLINE    ONLINE    rac2       

ora.asm        ora.asm.type   0/5    0/     ONLINE    ONLINE    rac2       

ora.cvu        ora.cvu.type   0/5    0/0    ONLINE    ONLINE    rac2       

ora.gsd        ora.gsd.type   0/5    0/     OFFLINE   OFFLINE              

ora....network ora....rk.type 0/5    0/     ONLINE    ONLINE    rac2       

ora.oc4j       ora.oc4j.type  0/1    0/2    ONLINE    ONLINE    rac2       

ora.ons        ora.ons.type   0/3    0/     ONLINE    ONLINE    rac2       

ora....SM1.asm application    0/5    0/0    ONLINE    ONLINE    rac2       

ora.rac2.gsd   application    0/5    0/0    OFFLINE   OFFLINE              

ora.rac2.ons   application    0/3    0/0    ONLINE    ONLINE    rac2       

ora.rac2.vip   ora....t1.type 0/0    0/0    ONLINE    ONLINE    rac2       

ora.scan1.vip  ora....ip.type 0/0    0/0    ONLINE    ONLINE    rac2