Database Software

Hello All,
we are on a 4 node rac windows 64 bit 2003 ..base release 10.2.0.3
Today morning we received a node eviction for node 3.
The crs log showed this message
2008-09-02 10:37:39.858: [ CRSEVT][8556]32CAAMonitorHandler :: 0:Action Script D:\oracle\product\10.2.0\crs\bin\racgwrap.bat(check) timed out for ora.serv-db03.vip! (timeout=60)
2008-09-02 10:37:39.874: [ CRSAPP][8556]32CheckResource error for ora.serv-db03.vip error code = -2
2008-09-02 10:39:43.000: [ CRSEVT][5396]32CAAMonitorHandler :: 0:Action Script D:\oracle\product\10.2.0\crs\bin\racgwrap.bat(check) timed out for ora.serv-db03.vip! (timeout=60)
2008-09-02 10:39:43.016: [ CRSAPP][5396]32CheckResource error for ora.serv-db03.vip error code = -2

Before the eviction happened, i was able to log on to the box but when the vip message started, sqlplus / as sysdba was hanging. No way to connect to the db. Listener status was also hanging. From node 1 crs log, we recevied heartbeat fatal error for node 3 and then the final eviction happned. During the entire time, i can ping the vip and the box from my laptop.no issues.
My question is ...when the error or the VIP timeout message is being written to the crs, is there any debugging that i can do....Is there any system dump that wil give more additional info as to what is happening. Will OSWatcher give the necessary clue at the OS level..

Please point the way..My SA is of the opinion that N/W is not an issue. How do i convince him that it could be..can he run any dignostic checks..

Thank You,