Solution to scan name configuration error during Oracle 11g RAC installation on virtual machines

Cause? -? The plug-in failed in its perform Method
Action? -? Refer to the logs or contact Oracle Support Services.
Log File Location
/U01/APP/orainventory/logs/installActions2013-01-04_08-37-53PM.log

/U01/APP/orainventory/logs/installActions2013-01-04_08-37-53PM.log log error:

Info: Checking single client access name (SCAN )...
Info: Checking name resolution setup for "rac_scan "...
Info: Error:
Info: PRVF-4664: found inconsistent name resolution entries for scan name "rac_scan"
Info: Error:
Info: PRVF-4657: name resolution setup check for "rac_scan" (IP Address: 192.168.8.88) failed
Info: Error:
Info: PRVF-4664: found inconsistent name resolution entries for scan name "rac_scan"
Info: verification of scan VIP and listener setup failed

I searched and found that this error was also mentioned in the article of yangtingkun:
F: rhel5.532oracle _ patchyangtingkun install oracle11_2 RAC for solaris10 sparc64 (2). MHT
Lao Yang mentioned at the end of the article:
The cause of this error is that the scan address is configured in/etc/hosts and the IP address is pinged. If the IP address can be successfully pinged, this error can be ignored.
I try to ping the scan IP address and can ping the IP address, so this error is temporarily ignored.