Session failed over issue

Hello,

Recently  I have installed 11.2.0.3 rac database successfully.

Now  I am in the process of initiating RAC System testing  and session failed over failing with below error.

I have connect to the database and check my session and it was connected to instance2.Then I  login  in node2 using root and reboot the machine.

my sql session should failed over to node1 but communication has failed .

is there anything needs to do on firewall side.

please help me to resolved this issue soon.

1)

SQL> select instance_name from v$instance;

INSTANCE_NAME

----------------

satldb2

SQL> select instance_name from v$instance;