Dedicated Backup Network between Oracle Exadata and Oracle Zero Data Loss Recovery Appliance

This section describes an Oracle convention for a dedicated backup network between Oracle Exadata and Oracle Zero Data Loss Recovery Appliance RA23. Its purpose is to facilitate Oracle Exadata customers using 10G networks to take advantage of the 100GE NICs option. The networking default configuration on RA23 remains 2 x 25 GE ports for ingest and 2 x 25GE ports for replication per compute server. A small benefit is that the dedicated network does increase network bandwidth for backup and restore traffic to the Oracle Zero Data Loss Recovery Appliance (ZDLRA).

The convention calls for two 100GE switches for the rack.

Table 2-14 Ethernet Cabling for the Recovery Appliance RA21 Racks

R23 Connection	Exadata X10M	Exadata X9M and earlier
100 GE	25GE NICs connected via Split Cables, or Direct Connection from Exadata Database Server X10M nodes 100GE NICs to RA23 TOR switches
25 GE	Connection from Exadata Database Server X10M node's 25GE NICs to RA23 TOR switches through: 25/10 SFPs, or Split cables	Connection from Exadata Database Server X9M node's 25GE NICs to RA23 TOR switches through: 25/10 SFPs, or Split cables
10 GE	TOR Switch is not recommended.	Use appropriate 10/40 split cables

* Using 100GE NICs in Exadata Database Server X10M nodes is not necessary.

Using the 10 GE port of the Exadata Database Server X10M with the ZDLRA TOR switches is inefficient, and not using them for this purpose keeps them available should older Exadata systems need to be connected.

Exadata Database Server X10M nodes can connect their 25GE NICs with 25/100GE Splitter Cables (1x100GE to 4x25GE).

25/100 GbE requires OM4 cables and splitters and (Q)SFP28 transceivers. 10 GbE requires OM3 cables and splitters and (Q)SFP+ transceivers.

If the Exadata and RA23 are in adjacent racks and 5 meters is sufficient, use the 7118366 Copper Splitter Cable assembly: 5 meters, QSFP28 to 4 SFP28 part to connect the database machine nodes to the RA23 ToR switches.

For longer distances, you must use optical connections. There are three parts to this:

• QSFP28 transceivers, part 7604159, to connect the cable to the switch. Two are required for every four database server nodes nodes.

• Optical splitter cables to run to the Exadata rack. Again, two are required for every four database server nodes, and the quantity chosen is per controller.

• Exadata has 25 GbE transceivers that are ordered with Exadata and not with RA23. Two are required for each database server node in the Exadata.

Figure 2-2 ZDLRA RA23 100GE to Exadata X10