Mani's Blog

November 15, 2011

Guidelines for Oracle RAC Network Requirements

Filed under: Database,Oracle,RAC — mani @ 6:25 pm

Below is some guidelines recommended for Network requirements for Oracle RAC setup in Oracle RAC linked group. Hope it would be useful for others.

Here it is:

1. A physical database server must have at least 2 physical NICs with at least 2 ports on each NIC to avoid having a SPOF on any one NIC.

2. A physical database server must have at least 2 physical HBAs with at least 2 ports on each HBA if SAN is being used for data storage.

3. If data traffic and cluster inter-node communication are combined on the same NICs, then:
a. Multiple VLANs must be created
b. VLAN tagging and Quality of Service (QoS) must both be used.
c. Cluster inter-node communication must be separated from public traffic on different VLANs.

4. Automated failover (such as Etherchannel, 802.3ad), must be used for primary/secondary failover of each NIC.

5. Independent network switches must be configured so that during failover from the primary to secondary NIC, a different network switch will also be used.

6. Network link aggregation may be used to combine network ports into a larger network channel, but this link itself must not be a SPOF. For example, if using 2 dual port NICs, then port A on NIC 1 must be aggregated to port B on the same NIC. NIC 2 must be configured to support failover of both port A and port B from NIC 1.

7. The server and networking infrastructure must be configured to allow multicast communications and large IP packets.

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