Hi Bishal,
You are not putting the right DMGR port. The port isn't 300.
Have you DMGR and NODE in the same machine?
After start DMGR. you need to:
1.- Logon in admin console.
2.- Go to System Administration->Deployment Manager->Ports
3.- Check SOAP_CONNECTOR_ADDRESS
Or go to:
C:\IBM\WebSphere\AppServer\profiles\Dmgr01\config\cells\CELNAME\nodes\CELLNODENAME\serverindex.xml
Open the file a search for SOAP_CONNECTOR_ADDRESS
Then from node launch:
C:\IBM\WebSphere\AppServer\profiles\AppSrv01\bin\synchNode.bat DMGR_HOST_IP SOAP_CONNECTOR_ADDRESS
If you have DMGR and NODE in the same machine:
C:\IBM\WebSphere\AppServer\profiles\AppSrv01\bin\synchNode.bat localhost SOAP_CONNECTOR_ADDRESS
Tell us if you can synchronize.
Regards