RAC Networking Lab

1. Edit your tnsnames.ora file In notepad or wordpad, open the file C:\oracle\product\10.2.0\db_1\NETWORK\ADMIN\tnsnames.ora For the Service name you created at install time, review the settings for TAF. Add the “(ENABLE = BROKEN)” line below the Description line Edit on both cluster nodes Test your ability to login to the database with sqlplus (on the server) using your service name, i.e. sqlplus system@MSnDB sqlplus system@MSnDB1 Sqlplus system@MSnDB_SVC

2. Test TAF Failover Open two Command Prompt windows In the first window, log into sqlplus with the service name, i.e Sqlplus system@MSnDB_SVC Run the following query: Select instance_name from v$instance; In the other window, shut down the instance shown in the query result Srvctl stop instance –d MSnDB –i MSnDB1 Repeat the query in the sqlplus session The instance should have changed

2. Test TAF Failover Optional - Restart all instances Repeat the exercise, but this time reboot the node of the instance in the query TCP/IP registry parameters may have to be edited for optimal failover time.

3. Client Networking Locate your client (desktop) tnsnames.ora file Copy in the contents of your server side tnsnames.ora file Omit the local and remote listener lines Test connectivity to your database Test TAF failover from the client Edit the client tnsnames.ora file to add access to a different class database Test connectivity to the alternate database

4. Networking Monitoring Demo Your instructor will demonstrate using ttcp to test network throughput for the private interconnect

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