I want to know is it possible to start Administration server on machine 2 ? if yes then how
Steps followed from this link http://docs.oracle.com/cd/E27559_01/doc.1112/e28391/classic.htm :
1. Weblogic 10.3.6 installation along with Oracle forms and reports 11g release 2(both 64 bit)
2. Successfully clustered the forms and reports cluster , Admin server on machine 1 able to start/stop any managed server
3. Platform Windows server 2008 R2 64 bit
May I know why you need to start admin server in both the physically separated server. If you want to achieve HA solution for admin server, then do the clustering in such a way that Admin server will run in Active-Passive mode.
You can refer the same document that you have mentioned.