Chapter 15: Analyzing Network Traffic 15-1 Copyright © 1998, Cisco Systems, Inc.

15-2MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Identify why specific traffic statistics should be monitored Identify which traffic statistics to monitor for different situations Identify when to monitor specific traffic statistics Configure the SPAN port Upon completion of this chapter, you will be able to: Objectives

15-3MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Start the TrafficDirector application and add agents to it Customize and install SwitchProbe® domains Monitor traffic Display packet size and utilization Identify most active hosts and host conversations Objectives (cont.)

15-4MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Reduce downtime Identify bottlenecks and failures Plan resources Identify trends Plan network segmentation Why Monitor Traffic Statistics?

15-5MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Overall traffic patterns Peak loads Error rates Traffic flow between devices Which Traffic Statistics Should Be Monitored?

15-6MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Establishing baselines before and after any change Continuously monitor for fault identification and capacity planning Monitor for trouble location Monitor for repair verification When Should Traffic Statistics Be Monitored?

15-7MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Configuring the Catalyst® SPAN Port

15-8MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Starting TrafficDirector

15-9MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Adding Agents to TrafficDirector

15-10MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Configuring SwitchProbe Agents

15-11MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Configuring Switch Agents

15-12MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Customizing SwitchProbe Domains

15-13MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Installing Domains

15-14MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Monitoring Traffic

15-15MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Displaying Packet Size and Utilization

15-16MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Displaying Utilization over Time

15-17MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Identifying the Most Active Hosts

15-18MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Identifying Host Conversations

15-19MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Summary Identify why specific traffic statistics should be monitored Identify which traffic statistics to monitor for different situations Identify when to monitor specific traffic statistics Configuring the Catalyst SPAN port

15-20MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Summary (cont.) Start the TrafficDirector application and add agents to it Customize and install SwitchProbe domains Monitor traffic Display packet size and utilization Identify most active hosts and host conversations

15-21MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Lab Diagram Management interface on VLAN1 Monitor interface on SPAN port

15-22MCSIAnalyzing Network Traffic Copyright © 1998, Cisco Systems, Inc. Blank for IG Pagination