Cisco Catalyst 3120 Software Manual page 967

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Configuring Cisco IOS IP SLAs Operations

Because the paths for the sending and receiving of data can be different (asymmetric), you can use the

per-direction data to more readily identify where congestion or other problems are occurring in the

The UDP jitter operation generates synthetic (simulated) UDP traffic and sends a number of UDP

packets, each of a specified size, sent a specified number of milliseconds apart, from a source router to

a target router, at a given frequency. By default, ten packet-frames, each with a payload size of 10 bytes

are generated every 10 ms, and the operation is repeated every 60 seconds. You can configure each of

these parameters to best simulate the IP service you want to provide.

To provide accurate one-way delay (latency) measurements, time synchronization, such as that provided

by NTP, is required between the source and the target device. Time synchronization is not required for

the one-way jitter and packet loss measurements. If the time is not synchronized between the source and

target devices, one-way jitter and packet loss data is returned, but values of 0 are returned for the

one-way delay measurements provided by the UDP jitter operation

Before you configure a UDP jitter operation on the source device, you must enable the IP SLAs

responder on the target device (the operational target).

Beginning in privileged EXEC mode, follow these steps to configure UDP jitter operation on the source

configure terminal

ip sla operation-number

Per-direction delay (one-way delay)

Round-trip delay (average round-trip time)

Enter global configuration mode.

Create an IP SLAs operation, and enter IP SLAs configuration mode.

Cisco Catalyst Blade Switch 3120 for HP Software Configuration Guide

Configuring IP SLAs Operations

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