SPAN (Switchport Analyz

List of Question

• Which switch that we want to monitor? 
• Are source port and destination port belong to same switch? 
• Which traffic direction we want to monitor? Is it traffic that coming to switch or traffic that leave the switch? or both?
• Do we have existing span configuration on the switch source?
• Are we want to monitor trunk ports? Are you sure all VLAN-ID that allowed on that trunk 
• Do you know that traffic that passed the destination port of RSPAN is always untagged? Do you have a problem with that?
• Do you know that traffic that passed the destination port of Local SPAN isn't always untagged?