How FCP cfmode settings work

Summary of cfmode settings and supported systems

The following table summarizes the cfmodes, supported systems, benefits and limitations.

cfmode	Supported Systems	Benefits and Limitations
partner	All systems except for FAS270c	Supports all host OS types. Supports all switches.
single_image	All systems	Supports all host OS types. Supports all switches. Makes all LUNs available on all target ports.
dual_fabric	FAS270c only	Supports all host OS types. Requires fewer switch ports. Does not support all switches. Requires switches that support public loop.
standby	All systems, except FAS270c	Requires more switch ports. Supports only Windows and Solaris hosts.
mixed	All systems, except FAS270c	Supports all operating systems. Does not support all switches. Requires switches that support public loop.

cfmode settings on both cluster nodes

The FCP cfmode settings must be set to the same value for both nodes in a cluster. If the cfmode is not set to the same value, your hosts might not be able to access data stored on the system.

cfmode settings for new systems and upgrades

Partner is the default cfmode setting of a new system with a new installation of Data ONTAP 7.1 or later.

When you upgrade to Data ONTAP 7.1 or later, the cluster saves the cfmode setting from the previous version. For example, if the systems in your cluster were set to standby mode before the upgrade, the cfmode setting remains in standby mode after the upgrade.