How to Determine If Oracle RAC Instances Are Using the Private Network

With most network protocols, you can issue the oradebug ipc command to see the interconnects that the database is using. For example:

oradebug setmypid

oradebug ipc

These commands dump a trace file to the location specified by the DIAGNOSTIC_DEST initialization parameter. The output may look similar to the following:

SSKGXPT 0x1a2932c flags SSKGXPT_READPENDING info for network 0

socket no 10 IP 172.16.193.1 UDP 43749

sflags SSKGXPT_WRITESSKGXPT_UP info for network 1

socket no 0 IP 0.0.0.0 UDP 0...

In the example, you can see the database is using IP 172.16.193.1 with a User Datagram Protocol (UDP) protocol. Also, you can issue the oradebug tracefile_name command to print the trace location where the output is written.

Additionally, you can query the V$CLUSTER_INTERCONNECTS view to see information about the private interconnect. For example:

SQL> SELECT * FROM V$CLUSTER_INTERCONNECTS;NAME IP_ADDRESS IS_ SOURCE

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

eth0 138.2.236.114 NO Oracle Cluster Repository

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