CHAPTER
18-1
Cisco Systems IntelligentGigabit Ethernet Switch Modules for the IBM BladeCenter, Software Configuration Guide
24R9746
18
Configuring SPAN and RSPAN
This chapter describes how to configure Switched Port Analyzer (SPAN) and Remote SPAN (RSPAN)
on your Cisco Systems Intelligent Gigabit Ethernet Switch Module.
Note For complete syntax and usage information for the commands used in this chapter, see the command
reference for this release.
This chapter consists of these sections:
•Understanding SPAN and RSPAN, page 18-1
•Configuring SPAN, page 18-7
•Configuring RSPAN, page 18-12
•Displaying SPAN and RSPAN Status, page 18-17

Understanding SPAN and RSPAN

You can analyze network traffic passing through ports by using SPAN to send a copy of the traffic to
another port on the switch that has been connected to a SwitchProbe device or other Remote Monitoring
(RMON) probe or security device. SPAN mirrors received or sent (or both) traffic on one or more source
ports to a destination port for analysis.
For example, in Figure18-1, all traffic on port 5 (the source port) is mirrored to port 17 (the destination
port). A network analyzer on port 17 receives all network traffic from port 5 without being physically
attached to port 5.