> # CFS Distribution over IP

> You can configure CFS to distribute information over IP for networks containing switches that are not reachable over Fibre Channel. CFS distribution over IP supports the following features:

> - Physical distribution over an entirely IP network.
> - Physical distribution over a hybrid Fibre Channel and IP network with the distribution reaching all switches that are reachable over either Fibre Channel or IP.

> Note The switch attempts to distribute information over Fibre Channel first and then over the IP network if the first attempt over Fibre Channel fails. CFS does not send duplicate messages if distribution over both IP and Fibre Channel is enabled.

> - Distribution over IP version 4 (IPv4) or IP version 6 (IPv6).

> Note CFS cannot distribute over both IPv4 and IPv6 from the same switch.

> - Keepalive mechanism to detect network topology changes using a configurable multicast address.
> - Compatibility with Cisco MDS SAN-OS Release 2.x.
> - Distribution for logical scope applications is not supported because the VSAN implementation is limited to Fibre Channel.

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