SPAN (Switched Port Analyzer) is a feature that allows network traffic from one or more source ports to be mirrored to a destination port for analysis. When configuring SPAN on a Cisco Nexus 5000 Series switch, two characteristics must be considered:
* A SPAN source port can be monitored in multiple SPAN sessions. This means that the same port can send traffic to different destination ports for different purposes or applications.
* A SPAN source port cannot be a destination SPAN port. This means that a port cannot receive traffic from another port that it is already monitoring. This prevents loops and conflicts in the SPAN configuration.
References := Configuring SPAN
https://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli_rel_4_1/Cisco_Ne