CRS无法启动，运行crsctl start crs无响应(二)

SQL*Plus: Release 11.1.0.7.0 - Production on Mon Dec 9 08:25:06 2013

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Connected to an idle instance.

SQL> startup
ORA-27504: IPC error creating OSD context
ORA-27300: OS system dependent operation:check if cable failed with status: 0
ORA-27301: OS failure message: Error 0
ORA-27302: failure occurred at: skgxpcini1
ORA-27303: additional information: requested interface eth1 interface not running set _disable_interface_checking = TRUE to disable this check for single instance cluster. Check output from ifcon
SQL>
SQL>
SQL> quit
Disconnected
报这个错误是因为RAC中的ASM和INSTANCE在启动的时候会通过私有网络去检查其他节点的私有网络信息，此时另一个节点是关机的。
解决办法是在asm参数文件中设定以下2个隐含参数：
_disable_instance_params_check = TRUE
_disable_interface_checking = TRUE
_disable_instance_params_check = TRUE的意义是在实例启动时忽略instance_type的值，而disable_interface_checking参数仅用于db的参数文件，用于asm实例时会报错ORA-15021: parameter "_disable_interface_checking" is not valid in asm instance，所以此处设置_disable_instance_params_check = TRUE用于略过instance_type的检查。
在实例参数文件中设定以下隐含参数：
_disable_interface_checking = TRUE

继续启动asm和instance，可以正常启动。