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IP SLAs--Analyzing IP Service Levels Using the ICMP Jitter Operation

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IP SLAs—Analyzing IP Service Levels Using the ICMP Jitter Operation

Contents

Restrictions for the IP SLAs ICMP Jitter Operation

Information About the IP SLAs ICMP Jitter Operation

Benefits of the IP SLAs ICMP Jitter Operation

Statistics Measured by the IP SLAs ICMP Jitter Operation

How to Configure the IP SLAs ICMP Jitter Operation

Configuring an IP SLAs ICMP Jitter Operation

Troubleshooting Tips

What to Do Next

Configuration Examples for the IP SLAs ICMP Jitter Operation

Configuring an IP SLAs ICMP Jitter Operation: Example

Where to Go Next

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Feature Information for the ICMP Jitter Operation


IP SLAs—Analyzing IP Service Levels Using the ICMP Jitter Operation

First Published: August 14, 2006
Last Updated: July 31, 2008

The Cisco IOS IP Service Level Agreements (SLAs) Internet Control Message Protocol (ICMP) Jitter Operation feature provides the capability to generate a stream of ICMP packets between a Cisco IOS device (source) and any other IP device (destination) to gather network performance-related statistics. The destination device can be any network device that supports ICMP such as a server or workstation. Available statistical measurements for the IP SLAs ICMP jitter operation include latency, round-trip time, jitter (interpacket delay variance), and packet loss. The IP SLAs ICMP jitter operation does not require configuration of the IP SLAs Responder feature on the destination device.

Finding Feature Information in This Module

Your Cisco IOS software release may not support all of the features documented in this module. To reach links to specific feature documentation in this module and to see a list of the releases in which each feature is supported, use the "Feature Information for the ICMP Jitter Operation" section.

Finding Support Information for Platforms and Cisco IOS and Catalyst OS Software Images

Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Contents

•Restrictions for the IP SLAs ICMP Jitter Operation

•Information About the IP SLAs ICMP Jitter Operation

•How to Configure the IP SLAs ICMP Jitter Operation

•Configuration Examples for the IP SLAs ICMP Jitter Operation

•Where to Go Next

•Additional References

•Feature Information for the ICMP Jitter Operation

Restrictions for the IP SLAs ICMP Jitter Operation

•When compared to the IP SLAs User Datagram Protocol (UDP) jitter operation, the IP SLAs ICMP jitter operation may provide less accurate measurements because the accuracy of the measurements provided by a non-Cisco destination device cannot be determined.

•Since ICMP packets do not support voice technology, the IP SLAs ICMP jitter operation does not support Mean Opinion Score (MOS), Calculated Planning Impairment Factor (ICPIF), or estimated transmission rating factor (R) reaction configuration capabilities.

Information About the IP SLAs ICMP Jitter Operation

To configure an IP SLAs ICMP jitter operation, you should understand the following concepts:

•Benefits of the IP SLAs ICMP Jitter Operation

•Statistics Measured by the IP SLAs ICMP Jitter Operation

Benefits of the IP SLAs ICMP Jitter Operation

The IP SLAs ICMP Jitter Operation feature provides the following key benefits:

•End-to-end performance measurements between a Cisco device (source) and any other IP device (destination) using ICMP.

•Proactive threshold violation monitoring through Simple Network Management Protocol (SNMP) trap notifications and syslog messages.

Statistics Measured by the IP SLAs ICMP Jitter Operation

The IP SLAs ICMP jitter operation supports the following statistical measurements:

•Jitter (source-to-destination and destination-to-source)

•Latency (source-to-destination and destination-to-source)

•Round-trip time latency

•Packet loss

•Successive packet loss

•Out-of-sequence packets (source-to-destination, destination-to-source, and round-trip)

•Late packets

Obtaining separate measurements for the source-to-destination and destination-to-source data paths can be useful for identifying problems in your network because the paths may be different (asymmetric),

How to Configure the IP SLAs ICMP Jitter Operation

This section contains the following task:

•Configuring an IP SLAs ICMP Jitter Operation

Configuring an IP SLAs ICMP Jitter Operation

Perform this task to configure and schedule an IP SLAs ICMP jitter operation.

SUMMARY STEPS

1. enable

2. configure terminal

3. ip sla operation-number

4. icmp-jitter {destination-ip-address | destination-hostname} [interval milliseconds] [num-packets packet-number] [source-ip {ip-address | hostname}]

5. frequency seconds

6. history history-parameter

7. owner owner-id

8. tag text

9. threshold milliseconds

10. timeout milliseconds

11. tos number

12. vrf vrf-name

13. exit

14. ip sla reaction-configuration operation-number react monitored-element [action-type option] [threshold-type {average [number-of-measurements] | consecutive [occurrences] | immediate | never | xofy [x-value y-value]}] [threshold-value upper-threshold lower-threshold]

15. ip sla schedule operation-number [life {forever | seconds}] [start-time {hh:mm[:ss] [month day | day month] | pending | now | after hh:mm:ss] [ageout seconds] [recurring]

16. exit

17. show ip sla configuration [operation-number]

DETAILED STEPS

 
Command or Action
Purpose

Step 1 

enable

Example:

Router> enable

Enables privileged EXEC mode.

•Enter your password if prompted.

Step 2 

configure terminal

Example:

Router# configure terminal

Enters global configuration mode.

Step 3 

ip sla operation-number

Example:

Router(config)# ip sla 10

Begins configuration for an IP SLAs operation and enters IP SLA configuration mode.

Step 4 

icmp-jitter {destination-ip-address | destination-hostname} [interval milliseconds] [num-packets packet-number] [source-ip {ip-address | hostname}]

Example:

Router(config-ip-sla)# icmp-jitter 172.18.1.129 interval 40 num-packets 100 source-ip 10.1.2.34

Configures the IP SLAs operation as an ICMP jitter operation and enters IP SLAs ICMP jitter configuration mode.

Step 5 

frequency seconds

Example:

Router(config-ip-sla-icmpjitter)# frequency 30

(Optional) Sets the rate at which a specified IP SLAs operation repeats.

Step 6 

history history-parameter

Example:

Router(config-ip-sla-icmpjitter)# history hours-of-statistics-kept 3

(Optional) Specifies the parameters used for gathering statistical history information for an IP SLAs operation.

Step 7 

owner owner-id

Example:

Router(config-ip-sla-icmpjitter)# owner admin

(Optional) Configures the Simple Network Management Protocol (SNMP) owner of an IP SLAs operation.

Step 8 

tag text

Example:

Router(config-ip-sla-icmpjitter)# tag TelnetPollServer1

(Optional) Creates a user-specified identifier for an IP SLAs operation.

Step 9 

threshold milliseconds

Example:

Router(config-ip-sla-icmpjitter)# threshold 10000

(Optional) Sets the upper threshold value for calculating network monitoring statistics created by an IP SLAs operation.

Step 10 

timeout milliseconds

Example:

Router(config-ip-sla-icmpjitter)# timeout 10000

(Optional) Sets the amount of time an IP SLAs operation waits for a response from its request packet.

Step 11 

tos number

Example:

Router(config-ip-sla-icmpjitter)# tos 160

(Optional) Defines a type of service (ToS) byte in the IP header of an IP SLAs operation.

Step 12 

vrf vrf-name

Example:

Router(config-ip-sla-icmpjitter)# vrf vpn-A

(Optional) Allows monitoring within Multiprotocol Label Switching (MPLS) Virtual Private Networks (VPNs) using IP SLAs operations.

Step 13 

exit

Example:

Router(config-ip-sla-icmpjitter)# exit

Exits IP SLAs ICMP jitter configuration submode and returns to global configuration mode.

Step 14 

ip sla reaction-configuration operation-number react monitored-element [action-type option] [threshold-type {average [number-of-measurements] | consecutive [occurrences] | immediate | never | xofy [x-value y-value]}] [threshold-value upper-threshold lower-threshold]

Example:

Router(config)# ip sla reaction-configuration 1 react jitterAvg threshold-value 5 2 action-type trap threshold-type immediate

(Optional) Configures certain actions to occur based on events under the control of Cisco IOS IP SLAs.

Step 15 

ip sla schedule operation-number [life {forever | seconds}] [start-time {hh:mm[:ss] [month day | day month] | pending | now | after hh:mm:ss] [ageout seconds] [recurring]

Example:

Router(config)# ip sla schedule 10 start-time now life forever

Configures the scheduling parameters for an individual IP SLAs operation.

Step 16 

exit

Example:

Router(config)# exit

(Optional) Exits global configuration mode and returns to privileged EXEC mode.

Step 17 

show ip sla configuration [operation-number]

Example:

Router# show ip sla configuration 10

(Optional) Displays configuration values including all defaults for all IP SLAs operations or a specified operation.

Troubleshooting Tips

Use the debug ip sla trace and debug ip sla error commands to help troubleshoot issues with an IP SLAs operation.

What to Do Next

To view and interpret the results of an IP SLAs operation use the show ip sla statistics and show ip sla statistics aggregated commands. Checking the output for fields that correspond to criteria in your service level agreement will help you determine whether the service metrics are acceptable.

Configuration Examples for the IP SLAs ICMP Jitter Operation

This section provides the following configuration example:

•Configuring an IP SLAs ICMP Jitter Operation: Example

Configuring an IP SLAs ICMP Jitter Operation: Example

The following example shows how to configure an IP SLAs ICMP jitter operation: 

ip sla 1

 icmp-jitter 172.18.1.129 interval 40 num-packets 100 source-ip 10.1.2.34

 frequency 50

!

ip sla reaction-configuration 1 react jitterAvg threshold-value 5 2 action-type trap 
threshold-type immediate

!

ip sla schedule 1 start-time now life forever

Where to Go Next

For information about other types of IP SLAs operations and IP SLAs features, see the Cisco IOS IP SLAs Features Roadmap.

Additional References

The following sections provide references related to the IP SLAs ICMP Jitter Operation feature.

Related Documents

Related Topic
Document Title

IP SLAs UDP jitter operation

"IP SLAs—Analyzing IP Service Levels Using the UDP Jitter Operation" chapter of the Cisco IOS IP SLAs Configuration Guide

Cisco IOS IP SLAs command-line interface enhancements

Cisco IOS IP Service Level Agreements Command Line Interface, Cisco white paper

Cisco IOS IP SLAs commands

Cisco IOS IP SLAs Command Reference


Standards

Standard
Title

No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.

—


MIBs

MIB
MIBs Link

•CISCO-RTTMON-MIB

•CISCO-RTTMON-ICMP-MIB

To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

http://www.cisco.com/go/mibs


RFCs

RFC
Title

No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature.

—


Technical Assistance

Description
Link

The Cisco Technical Support & Documentation website contains thousands of pages of searchable technical content, including links to products, technologies, solutions, technical tips, and tools. Registered Cisco.com users can log in from this page to access even more content.

http://www.cisco.com/techsupport


Feature Information for the ICMP Jitter Operation

Table 1 lists the release history for this feature.

Not all commands may be available in your Cisco IOS software release. For release information about a specific command, see the command reference documentation.

Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which Cisco IOS and Catalyst OS software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.

Note Table 1 lists only the Cisco IOS software release that introduced support for a given feature in a given Cisco IOS software release train. Unless noted otherwise, subsequent releases of that Cisco IOS software release train also support that feature.

Table 1 Feature Information for the ICMP Jitter Operation 

Feature Name
Releases
Feature Information

IP SLAs ICMP Jitter Operation

12.4(6)T

The Cisco IOS IP Service Level Agreements (SLAs) Internet Control Message Protocol (ICMP) jitter operation provides the capability to generate a stream of ICMP packets between a Cisco IOS device (source) and any other IP device (destination) to gather network performance-related statistics. Available statistical measurements for the IP SLAs ICMP jitter operation include latency, round-trip time, jitter (interpacket delay variance), and packet loss.


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