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Configuring IP SLAs Video Operations

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Configuring IP SLAs Video Operations

Configuring IP SLAs Video Operations

Last Updated: July 06, 2011

This document describes how to configure the Cisco IOS IP Service Level Agreements (SLAs) Video Operation feature to analyze one-way delay, one-way packet loss, one-way jitter, and connectivity in networks that carry video traffic.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the Feature Information Table at the end of this document.

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

Prerequisites for IP SLAs Video Operations

  • Both the source and responder devices for the IP SLAs video operation must be capable of providing platform-assisted video traffic generation and reflection.
  • Time synchronization, such as that provided by Network Time Protocol (NTP), is required between the source and the responder device in order to provide accurate one-way delay (latency) measurements. To configure NTP on the source and target devices, perform the tasks in the “Performing Basic System Management” module in the Cisco IOS Network Management Configuration Guide.

Restrictions for IP SLAs Video Operations

  • This feature is supported only on Cisco devices that are capable of generating platform-assisted video traffic and reflection, such as the Cisco Catalyst 3560, 3560-E, 3560-X, 3750, 3750-E, and 3750-X Series switches.

    Note
    The preceding list may not be all inclusive. See your product documenation for more information.
  • IP SLAs video operations do not support Round Trip Time (RTT) traffic.
  • Because IP SLAs video operations support only one-way traffic, an operation and a responder must be configured on both the source and responder and both devices must support SNMP access.
  • IP SLAs video operations are supported in IPv4 networks only.

Information About IP SLAs Video Operations

The platform-independent IP Service Level Agreements (SLAs) is a feature embedded in Cisco software. It allows you to understand IP service levels, increase productivity, lower operational costs, and reduce the frequency of network outages. IP SLAs performs the active monitoring of the network performance and can be used for network troubleshooting, network readiness assessment, and health monitoring.

IP SLAs in Cisco software is incapable of generating the high data rates, 4 to 16 Mbps, which are typical of video applications. To eliminate the protocol overhead and the process scheduling delays that contribute to the limitations of the earlier IP SLAs software to generate video traffic, the Cisco IP SLAs Video Operation feature makes the traffic generation and transmission routines platform dependent. Application programming interface (API) calls in the IP SLAs video operation software enable a more precise timer interrupt than the general system timer, which is insufficient for the packet generation requirements for a true video stream. Devices that can act as a source or a responder for an IP SLAs video operation are limited to Cisco routers and switches that are capable of providing platform-assisted video traffic generation and reflection.

An IP SLAs video operation differs from other IP SLA operations in that all traffic is one way only, with a responder required to process the sequence numbers and time stamps locally and to wait for a request from the source before sending the calculated data back.

The source sends a request to the responder when the current video operation is done. This request signals the responder that no more packets will arrive, and that the video sink function in the video operation can be turned off. When the response from the responder arrives at the source, the statistics are read from the message, and the relevant fields in the operation are updated.

Because all video operation traffic is one way, the responder is responsible for actually collecting and verifying the packets. The software that does packet count verification and time stamp jitter calculations is shared by both the source and responder. The responder stores this information until such time that the source requests the data, or a timer expires and the data is released.

Because the responder cannot directly read the video packets, the responder creates two queues and a block of reallocated memory for use by both video sink and the responder itself.

When a packet arrives at video sink, it is processed to extract the sequence numbers and time stamps, and that information is put into one of the pre-allocated memory blocks. A pointer to this block is put into the usedqueue for later processing by the main responder task.

At periodic timer intervals, the responder processes a number of the packet information blocks from the used queue and updates the statistics appropriately. When the data is processed, the blocks are returned to the free-memory list to be used again.

This procedure continues until the video operation is complete.

How to Configure IP SLAs Video Operations

Configuring an IP SLAs Responder

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    ip sla responder

4.    exit


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 responder


Example:

Router(config-term)# ip sla responder

 

Temporarily enables IP SLAs Responder functionality on a Cisco device in response to control messages from source.

 
Step 4
exit


Example:

Router(config-term)# exit

 

Exits global configuration mode and returns to privileged EXEC mode.

 

Configuring an IP SLAs Video Profile

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    ip sla operation-number

4.   video destination-ip-address | destination-hostname destination-port source-ip source-address | source-hostname source-port port-number profile traffic-type

5.   duration seconds

6.   frequency seconds

7.   history distribution-of-statistics-kept size

8.   history enhanced [interval seconds] [ buckets number-of-buckets]

9.   history hours-of-statistics-kept hours

10.   history statistics-distribution-interval milliseconds

11.   owner owner

12.   tag text

13.   timeout milliseconds

14.   threshold milliseconds

15.   vrf vrf-name

16.   end

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-term)# ip sla 10

 

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

 
Step 4
video destination-ip-address | destination-hostname destination-port source-ip source-address | source-hostname source-port port-number profile traffic-type


Example:

Router(config-ip-sla)# video 192.168.2.17 997 source-ip 192.168.2.16 source-port 555 profile telepresence

 

Configures a basic video profile for the IP SLAs operation being configured and enters IP SLA video configuration mode.

 
Step 5
duration seconds


Example:

Router(config-ip-sla-video)# duration 20

 

(Optional) Sets the amount of time during which synthetic traffic is generated for the IP SLAs video operation.

 
Step 6
frequency seconds


Example:

Router(config-ip-sla-video)# frequency 60

 

(Optional) Sets the amount of time during which synthetic traffic is generated for the IP SLAs video operation.

 
Step 7
history distribution-of-statistics-kept size


Example:

Router(config-ip-sla-video)# history distribution-of-statistics-kept 1

 

(Optional) Sets the number of statistics distributions kept during the IP SLAs video operation.

 
Step 8
history enhanced [interval seconds] [ buckets number-of-buckets]


Example:

Router(config-ip-sla-video)# history enhanced interval 900 buckets 100

 

(Optional) Enables enhanced history gathering for the IP SLAs video operation.

 
Step 9
history hours-of-statistics-kept hours


Example:

Router(config-ip-sla-video)# history hours-of-statistics-kept 2

 

(Optional) Sets the number of hours for which statistics are maintained for the IP SLAs video operation.

 
Step 10
history statistics-distribution-interval milliseconds


Example:

Router(config-ip-sla-video)# history statistics-distribution-interval 10

 

(Optional) Sets the time interval for each statistics distribution kept for the IP SLAs video operation.

 
Step 11
owner owner


Example:

Router(config-ip-sla-video)# 192.168.2.189 cwb.cisco.com User1 RTP 555-0100

 

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

 
Step 12
tag text


Example:

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

 

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

 
Step 13
timeout milliseconds


Example:

Router(config-ip-sla-video)# timeout 5000

 

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

 
Step 14
threshold milliseconds


Example:

Router(config-ip-sla-video)# threshold 5000

 

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

 
Step 15
vrf vrf-name


Example:

Router(config-ip-sla-video)# vrf vpn-1

 

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

 
Step 16
end


Example:

Router(config-ip-sla-video)# end

 

Returns to global configuration mode.

 
Step 17
show ip sla configuration [operation-number]


Example:

Router# show ip sla configuration 600

 

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

 

Configuring Proactive Threshold Monitoring

Perform this task to configure thresholds and reactive triggering for generating traps or starting another operation.

Before You Begin
  • IP SLAs operations to be started when violation conditions are met must be configured.

Note
  • RTT reactions for jitter operations are triggered only at the end of the operation and use the latest value for the return-trip time (LatestRTT).
  • SNMP traps for RTT for jitter operations are based on the average value for the return-trip time (RTTAvg) for the whole operation only and do not include return-trip time values for individual packets sent during the operation. Only syslog messages are supported for RTTAvg threshold violations.
  • Only syslog messages are supported for RTT violations during Jitter operations.
  • Only SNMP traps are supported for RTT violations during non-Jitter operations.
  • Only syslog messages are supported for non-RTT violations other than timeout, connectionLoss, or verifyError.
  • Both SNMP traps and syslog messages are supported for timeout, connectionLoss, or verifyError violations only.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    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]

4.    ip sla reaction-trigger operation-number target-operation

5.    ip sla logging traps

6.   Do one of the following:

  • snmp-server enable traps rtr
  • snmp-server enable traps syslog

7.    snmp-server host {hostname | ip-address} [vrf vrf-name] [traps | informs] [version {1 | 2c | 3 [auth | noauth | priv]}] community-string [udp-port port] [notification-type]

8.    exit

9.    show ip sla reaction configuration [operation-number]

10.    show ip sla reaction trigger [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 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 10 react jitterAvg threshold-type immediate threshold-value 5000 3000 action-type trapAndTrigger

 

Configures the action (SNMP trap or IP SLAs trigger) that is to occur based on violations of specified thresholds.

 
Step 4
ip sla reaction-trigger operation-number target-operation


Example:

Router(config)# ip sla reaction-trigger 10 2

 

(Optional) Starts another IP SLAs operation when the violation conditions are met.

  • Required only if the ip sla reaction-configuration command is configured with either the trapAndTriggeror triggerOnlykeyword.
 
Step 5
ip sla logging traps


Example:

Router(config)# ip sla logging traps

 

(Optional) Enables IP SLAs syslog messages from CISCO-RTTMON-MIB.

 
Step 6
Do one of the following:
  • snmp-server enable traps rtr
  • snmp-server enable traps syslog


Example:

Router(config)# snmp-server enable traps rtr



Example:

Router(config)# snmp-server enable traps syslog

 

(Optional) Enables system to generate CISCO-RTTMON-MIB traps.

or

Enables system to generate CISCO-SYSLOG-MIB traps.

 
Step 7
snmp-server host {hostname | ip-address} [vrf vrf-name] [traps | informs] [version {1 | 2c | 3 [auth | noauth | priv]}] community-string [udp-port port] [notification-type]


Example:

Router(config)# snmp-server host 10.1.1.1 public syslog

 

(Optional) Sends traps to a remote host.

  • Required if the snmp-server enable traps command is configured.
 
Step 8
exit


Example:

Router(config)# exit

 

Exits global configuration mode and returns to privileged EXEC mode.

 
Step 9
show ip sla reaction configuration [operation-number]


Example:

Router# show ip sla reaction configuration 10

 

(Optional) Displays the configuration of proactive threshold monitoring.

 
Step 10
show ip sla reaction trigger [operation-number]


Example:

Router# show ip sla reaction trigger 2

 

(Optional) Displays the configuration status and operational state of target operations to be triggered.

 

Scheduling IP SLAs Operations


Note
  • All IP SLAs operations to be scheduled must be already configured.
  • The frequency of all operations scheduled in a multioperation group must be the same.
  • List of one or more operation ID numbers to be added to a multioperation group is limited to a maximum of 125 characters, including commas (,).
SUMMARY STEPS

1.    enable

2.    configure terminal

3.    Do one of the following:

  • 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]
  • ip sla group schedule group-operation-number operation-id-numbers schedule-period schedule-period-range [ageout seconds] [frequency group-operation-frequency] [life{forever | seconds}] [start-time{hh:mm[:ss] [month day | day month] | pending | now | after hh:mm:ss}]

4.    exit

5.    show ip sla group schedule

6.    show ip sla configuration


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
Do one of the following:
  • 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]
  • ip sla group schedule group-operation-number operation-id-numbers schedule-period schedule-period-range [ageout seconds] [frequency group-operation-frequency] [life{forever | seconds}] [start-time{hh:mm[:ss] [month day | day month] | pending | now | after hh:mm:ss}]


Example:

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



Example:

Router(config)# ip sla group schedule 1 3,4,6-9

 

For individual IP SLAs operations only:

Configures the scheduling parameters for an individual IP SLAs operation.

or

For multioperation scheduler only:

Specifies an IP SLAs operation group number and the range of operation numbers to be scheduled in global configuration mode.

 
Step 4
exit


Example:

Router(config)# exit

 

Exits to privileged EXEC mode.

 
Step 5
show ip sla group schedule


Example:

Router# show ip sla group schedule

 

(Optional) Displays the IP SLAs group schedule details.

 
Step 6
show ip sla configuration


Example:

Router# show ip sla configuration

 

(Optional) Displays the IP SLAs configuration details.

 

Displaying Statistics for IP SLAs

SUMMARY STEPS

1.    enable

2.    show ip sla configuration [operation]

3.    show ip sla statistics [operation-number] [details]

4.    show ip sla statistics aggregated [operation-number] [details]

5.    exit


DETAILED STEPS
  Command or Action Purpose
Step 1
enable


Example:

Router> enable

 

Enables privileged EXEC mode.

  • Enter your password if prompted.
 
Step 2
show ip sla configuration [operation]


Example:

Router# show ip sla configuration 10

 

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

 
Step 3
show ip sla statistics [operation-number] [details]


Example:

Router# show ip sla statistics 10 details

 

(Optional) Displays display the current operational status and statistics of all IP SLAs operations or the specified operation.

 
Step 4
show ip sla statistics aggregated [operation-number] [details]


Example:

Router# show ip sla statistics aggregated 10 deatils

 

(Optional) Displays the aggregated statistical errors and distribution information for all IP SLAs operations or the specified operation.

 
Step 5
exit


Example:

Router# exit

 

Exits global configuration mode and returns to privileged EXEC mode.

 

Troubleshooting Tips

  • If the IP SLAs operation is not running and generating statistics, add the verify-data command to the configuration of the operation (while configuring in IP SLA configuration mode) to enable data verification. When enabled, each operation response is checked for corruption. Use the verify-data command with caution during normal operations because it generates unnecessary overhead.
  • Use the debugipsla trace and debug ip sla error commands to help troubleshoot issues with an IP SLAs operation.

Configuration Examples for IP SLAs Video Operations

Example: Basic IP SLAs Video Profile for Cisco TelePresence 1080P Traffic

        IP SLAs Infrastructure Engine-III
Entry number: 600
Owner: 
Tag: 
Operation timeout (milliseconds): 5000
Type of operation to perform: video
Video profile name: TELEPRESENCE
Target address/Source address: 10.10.10.1/10.10.10.2
Target port/Source port: 1/1
Vrf Name: 
Control Packets: enabled
Schedule:
   Operation frequency (seconds): 60  (not considered if randomly scheduled)
   Next Scheduled Start Time: Pending trigger
   Group Scheduled : FALSE
   Randomly Scheduled : FALSE
   Life (seconds): 3600
   Entry Ageout (seconds): never
   Recurring (Starting Everyday): FALSE
   Status of entry (SNMP RowStatus): notInService
Threshold (milliseconds): 5000
Distribution Statistics:
   Number of statistic hours kept: 2
   Number of statistic distribution buckets kept: 1
   Statistic distribution interval (milliseconds): 20
Enhanced History:

Example: Basic IP SLAs Video Profile for IP Television Traffic

        IP SLAs Infrastructure Engine-III
Entry number: 700
Owner: 
Tag: 
Operation timeout (milliseconds): 5000
Type of operation to perform: video
Video profile name: IPTV
Target address/Source address: 10.10.10.3/10.10.10.4
Target port/Source port: 1/1
Vrf Name: 
Control Packets: enabled
Schedule:
   Operation frequency (seconds): 60  (not considered if randomly scheduled)
   Next Scheduled Start Time: Pending trigger
   Group Scheduled : FALSE
   Randomly Scheduled : FALSE
   Life (seconds): 3600
   Entry Ageout (seconds): never
   Recurring (Starting Everyday): FALSE
   Status of entry (SNMP RowStatus): notInService
Threshold (milliseconds): 5000
Distribution Statistics:
   Number of statistic hours kept: 2
   Number of statistic distribution buckets kept: 1
   Statistic distribution interval (milliseconds): 20
Enhanced History:

Example: Basic IP SLAs Video Profile for IP Surveillance Camera Traffic

        IP SLAs Infrastructure Engine-III
Entry number: 800
Owner: 
Tag: 
Operation timeout (milliseconds): 5000
Type of operation to perform: video
Video profile name: IPVSC
Target address/Source address: 10.10.10.5/10.10.10.6
Target port/Source port: 1/1
Vrf Name: 
Control Packets: enabled
Schedule:
   Operation frequency (seconds): 60  (not considered if randomly scheduled)
   Next Scheduled Start Time: Pending trigger
   Group Scheduled : FALSE
   Randomly Scheduled : FALSE
   Life (seconds): 3600
   Entry Ageout (seconds): never
   Recurring (Starting Everyday): FALSE
   Status of entry (SNMP RowStatus): notInService
Threshold (milliseconds): 5000
Distribution Statistics:
   Number of statistic hours kept: 2
   Number of statistic distribution buckets kept: 1
   Statistic distribution interval (milliseconds): 20
Enhanced History:

Additional References

Related Documents

Related Topic Document Title

Cisco IOS commands

Cisco IOS Master Commands List, All Releases

IP SLAs commands

Cisco IOS IP SLAs Command Reference

Standards and RFCs

Standard/RFC Title

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

--

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

--

MIBs

MIB MIBs Link
  • CISCO-IPSLA-VIDEO-MIB
  • CISCO-RTTMON-MIB

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

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

Technical Assistance

Description Link

The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password.

http://www.cisco.com/cisco/web/support/index.html

Feature Information for IP SLAs Video Operations

The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

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

Table 1 Feature Information for IP SLAs Video Operations
Feature Name Releases Feature Information

IP SLAs Video Operations

12.2(58)SE

Analyzes one-way delay, one-way packet loss, one-way jitter, and connectivity in IPv4 networks that carry video traffic.

In Cisco IOS 12.2(58)SE, this feature is supported on only Cisco Catalyst 3750, 3750-E, 3750-X, 3650, 3650-E, and 3650-X Series switches.

The following commands were introduced or modified: duration (IP SLA video), frequency (IP SLA video), history distributions-of-statistics-kept, history enhanced, history hours-of-statistics-kept, history statistics-distribution-interval, owner, show ip sla application, show ip sla configuration, show ip sla statistics, show ip sla statistics aggregated, tag, threshold (IP SLA video), timeout (IP SLA video), video, vrf.

Cisco and the Cisco Logo are trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and other countries. A listing of Cisco's trademarks can be found at www.cisco.com/go/trademarks. Third party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1005R)

Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental.