Chapter 20 Configuring Span; Understanding Span - Cisco Catalyst 2950 Software Configuration Manual

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Configuring SPAN

This chapter describes how to configure Switch Port Analyzer (SPAN) on your switch.

For complete syntax and usage information for the commands used in this chapter, refer to the

Catalyst 2950 Desktop Switch Command Reference for this release.

This chapter consists of these sections:

You can analyze network traffic passing through ports or VLANs 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. SPAN mirrors received or sent (or both) traffic on one or more source ports

to a destination port for analysis.

For example, in

Ethernet 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.

Understanding SPAN, page 20-1

Configuring SPAN, page 20-5

Displaying SPAN Status, page 20-8

20-1, all traffic on Fast Ethernet port 5 (the source port) is mirrored to Fast

C H A P T E R

Catalyst 2950 Desktop Switch Software Configuration Guide

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