Supported MTU Sizes

To ensure proper network traffic flow, MTUs must be the same across the clouds and VNICs. However the MTU sizes available can differ depending on the fabric type in which the clouds and VNICs are being created:

• For QDR VNICs, the MTU is set by the PVI cloud, and the PVI VNIC inherits the MTU value when it connects to the PVI cloud. If needed, you can set a different MTU size on the PVI VNIC, but the default interface MTU from the cloud supports correct functionality in QDR fabrics.

• For EDR VNICs, the MTU is controlled by the IB MTU. See the following table for correct sizes.

Type of cloud Fabric Type MTU RC-mode PVI clouds QDR and EDR 1500 9000 65504 (Default) UD-mode PVI clouds EDR 1500 4070 9000 (Jumbo) (default) 9222 Note -  MTUs above 4070 are supported only on Oracle Dual Port QDR InfiniBand Adapter and Oracle EDR hardware. UD-mode public clouds EDR 1500 (default) 4070 9000 (Jumbo) 9194

Related Information

• Configuration Considerations

• Create a Public Cloud (EDR)

• Controlling Uplinks for Public Clouds (EDR)

• Create a PVI Cloud (QDR)

• Create a PVI VNIC (EDR) (GUI)

• Create a PVI VNIC (QDR) (GUI)

• Create an HA PVI VNIC (EDR) (GUI)

• Create an HA PVI VNIC (QDR) (GUI)

• Set Up PVI VNIC Redundancy on Hosts

• Complete the Oracle SDN Configuration