Cisco Systems OL-11291-01 manual Measuring Network Performance for Dhcp, Defining a Dhcp Operation

Chapter 3 Using IPM to Measure Network Performance

Measuring Network Performance for DHCP

Measuring Network Performance for DHCP

The DHCP operation measures the round-trip latency time taken to discover a DHCP server and obtain a lease from it. After obtaining an IP address, SA Agent releases the IP address that was leased by the server. By default, the DHCP operation sends discovery packets on every available IP interface on the source router.

However, if a specific DHCP server is configured on the router, then discovery packets are sent to only that DHCP server. The DHCP operation also measures availability and errors for DHCP services.

To measure end-to-end performance for DHCP:

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 To control how statistics are collected, use the DefaultDHCP operation or define your own DHCP operation. For details on defining a DHCP operation, see Defining a DHCP Operation.

Step 3 Define a collector to measure performance between the source router and the DHCP servers. 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 DHCP Historical Statistics window. For details on viewing statistics for DHCP, see Viewing Statistics for DHCP.

Defining a DHCP Operation

IPM provides a default DHCP operation for measuring performance in leasing an IP address from a DHCP server. In addition, IPM provides the option to create, modify, or delete your own DHCP operations from the DHCP Operation Configuration window.

To define a DHCP 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 DHCP.

The DHCP Operation Configuration window (Figure 3-1) appears.

User Guide for Internetwork Performance Monitor

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