# Troubleshooting Mirroring Configuration

I am configuring database mirroring on SQL Server 2012. After configuration I am getting the following error when attempting to start the mirroring session:

tcp server cannot be reached or does not exist. Check the network address name and the ports for the local and remote are operational.

an Exception occured while executing a Transactional-SQL Statment.

• Are you using FQDN - fully qualified domain name ? Also, are the end points configured properly? Try the steps mentioned at blog.sqlauthority.com/2010/01/11/… – Kin Shah Sep 9 '13 at 7:14
• yes am using FQDN and End points are configured properly. – user2315732 Sep 9 '13 at 7:26
• For your info am not able to use Telnet from my servers – user2315732 Sep 9 '13 at 7:27
• is it giving u error ? – Kin Shah Sep 9 '13 at 9:49
• Gives me that Telnet is not recognized as internatl or external command,operable program or batch file – user2315732 Sep 9 '13 at 10:48

GRANT CONNECT ON ENDPOINT::Endpoint_Mirroring TO [Mydomain\username4service];

• Have you looked at the Encryption algorithm on both servers, they should be the same. Run: Select * sys.dm_db_mirroring_connections – Raadee Sep 11 '13 at 6:32