> # Guidelines to Configure VSANs as a Source

> The following guidelines apply when configuring VSANs as a source:

> - Traffic on all interfaces included in a source VSAN is spanned only in the ingress direction.
> - If a VSAN is specified as a source, you cannot perform interface-level SPAN configuration on the interfaces that are included in the VSAN. Previously configured SPAN-specific interface information is discarded.
> - If an interface in a VSAN is configured as a source, you cannot configure that VSAN as a source. You must first remove the existing SPAN configurations on such interfaces before configuring VSAN as a source.
> - Interfaces are only included as sources when the port VSAN matches the source VSAN. ports in the switch are in VSAN 1 except fc1/1.
> - Interface fc1/1 is the TE port with port VSAN 2. VSANs 1, 2, and 3 are configured in the allowed list.
> - VSAN 1 and VSAN 2 are configured as SPAN sources.

> For this configuration, the following apply:

> - VSAN 2 as a source includes only the TE port fc1/1 that has port VSAN 2.
> - VSAN 1 as a source does not include the TE port fc1/1 because the port VSAN does not match VSAN 1.

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