> # Guidelines to Specifying Filters

> The following guidelines apply to SPAN filters:

> - PortChannel configurations are applied to all ports in the PortChannel.
> - If no filters are specified, the traffic from all active VSANs for that interface is spanned by default.
> - While you can specify arbitrary VSAN filters in a session, traffic can only be monitored on the port VSAN or on allowed-active VSANs in that interface.

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