> # SPAN Sessions

> Each SPAN session represents an association of one destination with a set of source(s) along with various other parameters that you specify to monitor the network traffic. One destination can be used by one or more SPAN sessions. You can configure up to 16 SPAN sessions in a switch. Each session can have several source ports and one destination port.

> To activate any SPAN session, at least one source and the SD port must be up and functioning. Otherwise, traffic is not directed to the SD port.

> Tip A source can be shared by two sessions, however, each session must be in a different direction—one ingress and one egress.

> You can temporarily deactivate (suspend) any SPAN session. The traffic monitoring is stopped during this time.

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