Cisco Systems OL-11291-01 manual Measuring End-to-End Performance for IP

Chapter 3 Using IPM to Measure Network Performance

Measuring Network Performance for IP

Measuring End-to-End Performance for IP

IPM’s Echo operations measure end-to-end performance between a source and any IP-enabled device. Latency is computed by measuring the time taken between sending an ICMP echo request message to the destination and receiving an ICMP echo reply. The IP Echo operation also measures availability and errors for IP services.

With an IP Echo operation, you can determine performance on a specific path by using Loose Source Routing. Additionally, IPM provides an option for measuring quality of service (QoS) between endpoints by setting the DSCP and the type of service (ToS) bits on the IP packet.

To measure end-to-end performance for IP:

Step 1 Define a device as the source device from which to measure performance. For details on defining a source device, see Defining a Source Device.

Step 2 Define a device as the target of ICMP echo requests from the source device. For details on defining a target, see Defining a Target.

To control how statistics are collected, use the DefaultIPEcho operation or define your own IP Echo operation. For details on defining an IP Echo operation, see Defining an IP Echo Operation.

Step 3 Define a collector to measure performance between the source and target you defined. For details on defining a collector, see Defining a Collector. If you set the collector’s schedule to On Demand, start the collector when needed.

Step 4 View the statistics in the Echo Historical Statistics window. For details on viewing end-to-end statistics for IP, see Viewing End-to-End Statistics for IP.

Defining an IP Echo Operation

IPM provides a default IP Echo operation for measuring performance between a source and target. In addition, IPM provides the option to create, modify, or delete your own IP Echo operations from the Echo Operation Configuration window.

To define an IP Echo operation:

Step 1 From the IPM Main Window, select Edit > Configuration.

The Configuration window appears.

Step 2 Click Operation.

The Operation Configuration window appears within the Configuration window.

Step 3 Click Echo.

The Echo Operation Configuration window (Figure 3-11) appears.

	User Guide for Internetwork Performance Monitor
OL-11291-01		3-19