> # CFS Features

> CFS has the following features:

> - Peer-to-peer protocol with no client-server relationship at the CFS layer.
> - Three scopes of distribution.
> - Logical scope—The distribution occurs within the scope of a VSAN.
> - Physical scope—The distribution spans the entire physical topology.
> - Over a selected set of VSANs—Some applications, such as Inter-VSAN Routing (IVR), require configuration distribution over some specific VSANs. These applications can specify to CFS the set of VSANs over which to restrict the distribution.
> - Three modes of distribution.
> - Coordinated distributions—Only one distribution is allowed in the fabric at any given time.
> - Uncoordinated distributions—Multiple parallel distributions are allowed in the fabric except when a coordinated distribution is in progress.
> - Unrestricted uncoordinated distributions—Multiple parallel distributions are allowed in the fabric in the presence of an existing coordinated distribution. Unrestricted uncoordinated distributions are allowed to run in parallel with all other types of distributions.
> - Supports a merge protocol that facilitates the merge of application configuration during a fabric merge event (when two independent fabrics merge).

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