> # CFS Distribution Scopes

> Different applications on the Cisco MDS 9000 Family switches need to distribute the configuration at various levels:

> - VSAN level (logical scope)

> Applications that operate within the scope of a VSAN have the configuration distribution restricted to the VSAN. An example application is port security where the configuration database is applicable only within a VSAN.

> - Physical topology level (physical scope)

> Applications might need to distribute the configuration to the entire physical topology spanning several VSANs. Such applications include NTP and DPVM (WWN-based VSAN), which are independent of VSANs.

> - Between two switches

> Applications might only operate between selected switches in the fabric. An example application is SCSI flow services, which operates between two switches.

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