user manual

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User Guide for Internetwork Performance Monitor
OL-11291-01
Chapter 3 Using IPM to Measure Network Performance
Measuring Network Performance for IP
Step 3 Click Path Echo.
The Path Echo Operation Configuration window (Figure 3-13) appears.
Figure 3-13 IP Path Echo Operation Configuration Window
Step 4 In the Name field, enter a descriptive name to assign to the operation. In the Description field, you can
enter a brief description of the operation, including its purpose.
Step 5 Select the IP QoS Type as IP Precedence or DCSP. The IP QoS Settings values change based on your IP
QoS Type selection.
• If you have selected IP QoS Type as IP Precedence, select the IP QoS Settings value from the
drop-down. The value you select sets the priority for the HTTP request packet. The default setting
is 0 (no priority). This option sets the ToS bits in the IP packet.
• If you have selected IP QoS Type as DSCP, select the desired IP QoS Settings value from the
drop-down. The value you select defines the packet priority and is based on the DSCP RFC
standards.
Step 6 In the Request Payload field, enter the number of bytes to use for the size of the payload of the ICMP
echo request packet. The default setting is 64 bytes.
• To specify the maximum number of paths to discover, enter a value in the Maximum Paths field. The
valid range is 1 to 128 paths. The default setting is 5. To ensure that you do not miss collecting
statistics for relevant paths, set this value to a number slightly higher than the expected number of
paths.
• To specify the maximum number of hops to discover, enter a value in the Maximum Hops field. The
valid range is 1 to 25 hops. The default setting is 25 hops. To ensure that you do not miss collecting
statistics for relevant hops, set this value to a number slightly higher than the expected number of
hops.