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All traffic on port 5 (the source port) is mirrored to port 10 (the destination port). A network analyzer on port
10 receives all network traffic from port 5 without being physically attached to port 5.
Figure 4: Example of Local SPAN Configuration on a Single Device
This is an example of a local SPAN in a switch stack, where the source and destination ports reside on different
stack members.
Figure 5: Example of Local SPAN Configuration on a Device Stack
Remote SPAN
RSPAN supports source ports, source VLANs, and destination ports on different switches (or different switch
stacks), enabling remote monitoring of multiple switches across your network.
Catalyst 2960-X Switch Network Management Configuration Guide, Cisco IOS Release 15.0(2)EX
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Configuring SPAN and RSPAN
SPAN and RSPAN