> # About Broadcast Zoning

> Note Broadcast zoning is not supported on the Cisco Fabric Switch for HP c-Class BladeSystem and the Cisco Fabric Switch for IBM BladeCenter.

> You can configure broadcast frames in the basic zoning mode. By default, broadcast zoning is disabled and broadcast frames are sent to all Nx ports in the VSAN. When enabled, broadcast frames are only sent to Nx ports in the same zone, or zones, as the sender. Enable broadcast zoning when a host or storage device uses this feature.

> Table 17-2 identifies the rules for the delivery of broadcast frames.

> Table 17-2 Broadcasting Requirements
> Active Zoning? | Broadcast Enabled? | Frames Broadcast? | Comments
> --- | --- | --- | ---
> Yes | Yes | Yes | Broadcast to all Nx ports that share a broadcast zone with the source of broadcast frames.
> No | Yes | Yes | Broadcast to all Nx ports.
> Yes | No | No | Broadcasting is disabled.

> Tip If any NL port attached to an FL port shares a broadcast zone with the source of the broadcast frame, then the frames are broadcast to all devices in the loop.

> Caution | If broadcast zoning is enabled on a switch, you cannot configure the interop mode in that VSAN.

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