Configuring IP SLAs for Metro-Ethernet

This module describes how to configure an IP Service Level Agreements (SLAs) for Metro-Ethernet to gather network performance metrics in service-provider Ethernet networks. Available statistical measurements for the IP SLAs Ethernet operation include round-trip time, jitter (interpacket delay variance), and packet loss.

Prerequisites for IP SLAs for Metro-Ethernet

It is recommended that the IEEE 802.1ag standard is supported on the destination devices in order to obtain complete error reporting and diagnostics information.

Restrictions for IP SLAs for Metro-Ethernet

  • Memory and performance may be impacted for a given Ethernet CFM maintenance domain and Ethernet Virtual Circuit (EVC) or VLAN that has a large number of maintenance endpoints (MEPs).

  • In case of PW redundancy, we need to have 2 different CFM/Y1731 sessions on active and backup PW. We cannot expect the same mpid and Y1731 session to work after PW switchover.

  • Y1731 is not supported for port meps.
  • CFM ans Y1731 is not supported for vpls cases, untagged EFP as well.

Information About IP SLAs for Metro-Ethernet

IP SLAs Ethernet Operation Basics

The IP SLAs for Metro-Ethernet integrates IP SLAs with the Ethernet Connectivity Fault Management (CFM) feature. Ethernet CFM is an end-to-end per-service-instance Ethernet-layer operation, administration, and management (OAM) protocol.

The IP SLAs for Metro-Ethernet feature provides the capability to gather statistical measurements by sending and receiving Ethernet data frames between Ethernet CFM maintenance endpoints (MEPs). The performance metrics for IP SLAs Ethernet operations are measured between a source MEP and a destination MEP. Unlike existing IP SLAs operations that provide performance metrics for the IP layer, the IP SLAs Ethernet operation provides performance metrics for Layer 2.

IP SLAs Ethernet operations may be configured using the command-line interface (CLI) or Simple Network Management Protocol (SNMP).

You can manually configure individual Ethernet ping or Ethernet jitter operations by specifying the destination MEP identification number, name of the maintenance domain, and EVC or VLAN identifier or port level option.

You also have the option to configure an IP SLAs auto Ethernet operation (ping or jitter) that will query the Ethernet CFM database for all maintenance endpoints in a given maintenance domain and EVC or VLAN. When an IP SLAs auto Ethernet operation is configured, individual Ethernet ping or Ethernet jitter operations are automatically created based on the MEPs that were discovered. A notification mechanism exists between the IP SLAs and Ethernet CFM subsystems to facilitate the automatic creation of Ethernet ping or Ethernet jitter operations for applicable MEPs that are added to a given maintenance domain and EVC or VLAN while an auto Ethernet operation is running.

The IP SLAs for Metro-Ethernet feature supports multioperation scheduling of IP SLAs operations and proactive threshold violation monitoring through SNMP trap notifications and syslog messages.

Statistics Measured by the IP SLAs Ethernet Operation

The network performance metrics supported by the IP SLAs Ethernet operation is similar to the metrics supported by existing IP SLAs operations. The statistical measurements supported by the IP SLAs Ethernet jitter operation include the following:

  • Round-trip time latency

  • Unprocessed packets

  • Packet loss (source-to-destination and destination-to-source)

  • Out-of-sequence, tail-dropped, and late packets

How to Configure IP SLAs for Metro-Ethernet


Note

There is no need to configure an IP SLAs responder on the destination device.

Configuring an IP SLAs Auto Ethernet Operation with Endpoint Discovery on the Source Device

Procedure

  Command or Action Purpose

Step 1

enable

Example:


Device> enable

Enables privileged EXEC mode.

  • Enter your password if prompted.

Step 2

configure terminal

Example:


Device# configure terminal

Enters global configuration mode.

Step 3

ip sla ethernet-monitor operation-number

Example:


Device(config)# ip sla ethernet-monitor 1

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

Step 4

type echo domain domain-name {evc evc-id | vlan vlan-id } [exclude-mpids mp-ids ]

Example:


Device(config-ip-sla-ethernet-monitor)# type echo domain testdomain vlan 34
  • domain domain-name —Specify the name of the created domain.
  • vlan vlan-id —Enter the service provider VLAN ID or IDs as a VLAN-ID (1 to 4094), a range of VLAN-IDs separated by a hyphen, or a series of VLAN IDs separated by comma.
  • exclude-mpidsmp-ids —Enter a maintenance end point identifier (mpid). The identifier must be unique for each VLAN (service instance). The range is 1 to 8191.
For Echo operations only: Configures an auto Ethernet operation for Ethernet ping operations.

Note

 

Depending on your release, the evc evc-id keyword and argument combination may not be available for this command.

Step 5

cos cos-value

Example:


Device(config-ip-sla-ethernet-params)# cos 2

(Optional) Sets the class of service for an IP SLAs Ethernet operation.

Step 6

owner owner-id

Example:


Device(config-ip-sla-ethernet-params)# owner admin

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

Step 7

request-data-size bytes

Example:


Device(config-ip-sla-ethernet-params)# request-data-size 64

(Optional) Sets the padding size for the data frame of an IP SLAs Ethernet operation.

  • The default value for IP SLAs Ethernet ping operations is 66 bytes.

  • The default value for IP SLAs Ethernet jitter operations is 51 bytes.

Step 8

tag text

Example:


Device(config-ip-sla-ethernet-params)# tag TelnetPollSever1

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

Step 9

threshold milliseconds

Example:


Device(config-ip-sla-ethernet-params)# threshold 10000

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

Step 10

timeout milliseconds

Example:


Device(config-ip-sla-ethernet-params)# timeout 10000

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

Step 11

end

Example:


Device(config-ip-sla-ethernet-params)# end

Exits to privileged EXEC configuration mode.

Step 12

show ip sla ethernet-monitor configuration [operation-number ]

Example:


Device# show ip sla ethernet-monitor configuration 1

(Optional) Displays configuration settings for all IP SLAs auto Ethernet operations or a specified auto Ethernet operation.

What to do next

To add proactive threshold conditions and reactive triggering for generating traps, or for starting another operation, to an IP SLAs operation, see the "Configuring Proactive Threshold Monitoring" section.

Manually Configuring an IP SLAs Ethernet Ping or Jitter Operation on the Source Device

Procedure

  Command or Action Purpose

Step 1

enable

Example:


Device> enable

Enables privileged EXEC mode.

  • Enter your password if prompted.

Step 2

configure terminal

Example:


Device# configure terminal

Enters global configuration mode.

Step 3

ip sla operation-number

Example:


Device(config)# ip sla 1

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

Step 4

ethernet echo mpid mp-id domain domain-name {evc evc-id | port | vlan vlan-id }

Example:


Device(config-ip-sla)# ethernet echo mpid 23 domain testdomain vlan 34
For a ping operation only: Configures the IP SLAs operation as an Ethernet ping operation and enters Ethernet echo configuration mode.

Note

 

Depending on your release, the evc evc-id keyword and argument combination may not be available for this command.

Step 5

ethernet jitter mpid mp-id domain domain-name {evc evc-id | port | vlan vlan-id } [interval interframe-interval ] [num-frames frames-number ]

Example:


Device(config-ip-sla)# ethernet jitter mpid 23 domain testdomain evc testevc interval 20 num-frames 30
For a jitter operation only: Configures the IP SLAs operation as an Ethernet jitter operation and enters Ethernet jitter configuration mode.

Note

 

Depending on your release, the evc evc-id keyword and argument combination may not be available for this command.

Step 6

cos cos-value

Example:


Device(config-ip-sla-ethernet-echo)# cos 2

(Optional) Sets the class of service for an IP SLAs Ethernet operation.

Note

 

For this and the remaining steps, the configuration mode shown in the example is for configuring an Ethernet echo operation. However, the commands are the same in the Ethernet jitter configuration mode.

Step 7

frequency seconds

Example:


Device(config-ip-sla-ethernet-echo)# frequency 30

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

Step 8

history history-parameter

Example:


Device(config-ip-sla-ethernet-echo)# history hours-of-statistics-kept 3

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

Step 9

owner owner-id

Example:


Device(config-ip-sla-ethernet-echo)# owner admin

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

Step 10

request-data-size bytes

Example:


Device(config-ip-sla-ethernet-echo)# request-data-size 64

(Optional) Sets the padding size for the data frame of an IP SLAs Ethernet operation.

The default value for IP SLAs Ethernet ping operations is 66 bytes. The default value for IP SLAs Ethernet jitter operations is 51 bytes.

Step 11

tag text

Example:


Device(config-ip-sla-ethernet-echo)# tag TelnetPollSever1

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

Step 12

threshold milliseconds

Example:


Device(config-ip-sla-ethernet-echo)# threshold 10000

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

Step 13

timeout milliseconds

Example:


Device(config-ip-sla-ethernet-echo)# timeout 10000

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

Step 14

end

Example:


Device(config-ip-sla-ethernet-echo)# end

Exits to privileged EXEC mode.

Step 15

show ip sla configuration [operation-number ]

Example:


Device# show ip sla configuration 1

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

Step 16

show ip sla application

Example:


Device# show ip sla application

(Optional) Displays global information about supported IP SLAs features.

What to do next

To add proactive threshold conditions and reactive triggering for generating traps, or for starting another operation, to an IP SLAs operation, see the "Configuring Proactive Threshold Monitoring" section.

Scheduling IP SLAs Operations


Note
  • All IP SLAs operations to be scheduled must be already configured.
  • The frequency of all operations scheduled in an operation group must be the same unless you are enabling the random scheduler option for a multioperation scheduler.

Procedure

  Command or Action Purpose

Step 1

enable

Example:


Device> enable

Enables privileged EXEC mode.

  • Enter your password if prompted.

Step 2

configure terminal

Example:


Device# configure terminal

Enters global configuration mode.

Step 3

Do one of the following:

  • ip sla ethernet-monitor schedule operation-number schedule-period seconds [frequency [seconds ]] [start-time {after hh : mm : ss | hh : mm [: ss ] [month day | day month ] | now | pending }]
  • 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:


Device(config)# ip sla ethernet-monitor schedule 10 schedule-period 60 start-time now

Device(config)# ip sla schedule 1 start-time now life forever

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

  • The first example shows how to configure scheduling parameters for an IP SLAs auto Ethernet operation.

  • The second example shows how to configure the scheduling parameters for an individual IP SLAs operation.

  • The third example shows how to specifiy an IP SLAs operation group number and range of operation numbers to be scheduled for a multioperation scheduler.

Step 4

exit

Example:


Device(config)# exit

Exits to the privileged EXEC mode.

Step 5

show ip sla group schedule

Example:


Device# show ip sla group schedule

(Optional) Displays the IP SLAs group schedule details.

Step 6

show ip sla configuration

Example:


Device# show ip sla configuration

(Optional) Displays the IP SLAs configuration details.

Troubleshooting Tips

Use the debug ip sla trace and debug ip sla error commands to help troubleshoot issues with an individual IP SLAs Ethernet ping or Ethernet jitter operation. Use the debug ip sla ethernet-monitor command to help troubleshoot issues with an IP SLAs auto Ethernet operation.

What to Do Next

To add proactive threshold conditions and reactive triggering for generating traps (or for starting another operation) to an IP SLAs operation, see the “Configuring Proactive Threshold Monitoring” section.

operation)

To display and interpret the results of an IP SLAs operation, use the show ip sla statistics command. Check the output for fields that correspond to criteria in your service level agreement to determine whether the service metrics are acceptable.

Configuration Examples for IP SLAs for Metro-Ethernet

Example IP SLAs Auto Ethernet Operation with Endpoint Discovery

The following examples shows the operation parameters, proactive threshold monitoring, and scheduling options for an IP SLAs auto Ethernet operation. In Configuration A, operation 10 is configured to automatically create IP SLAs Ethernet ping operations for all the discovered maintenance endpoints in the domain named testdomain and VLAN identification number 34. In Configuration B, operation 20 is configured to automatically create IP SLAs Ethernet ping operations for all the discovered maintenance endpoints in the domain named testdomain and EVC identified as testevc. In both configurations, the proactive threshold monitoring configuration specifies that when three consecutive connection loss events occur, an SNMP trap notification should be sent. The schedule period for operation 10 and operation 20 is 60 seconds, and both operations are scheduled to start immediately.

Configuration A


ip sla ethernet-monitor 10
 type echo domain testdomain vlan 34
!
ip sla ethernet-monitor reaction-configuration 10 react connectionLoss threshold-type consecutive 3 action-type trapOnly
!
ip sla ethernet-monitor schedule 10 schedule-period 60 start-time now

Configuration B


ip sla ethernet-monitor 20
 type echo domain testdomain evc testevc
!
ip sla ethernet-monitor reaction-configuration 20 react connectionLoss threshold-type consecutive 3 action-type trapOnly
!
ip sla ethernet-monitor schedule 20 schedule-period 60 start-time now

Example Individual IP SLAs Ethernet Ping Operation

The following example show the configuration for an IP SLAs Ethernet ping operation. In Configuration C, the maintenance endpoint identification number is 23, the maintenance domain name is testdomain, and the VLAN identification number is 34. In Configuration D, the maintenance endpoint identification number is 23, the maintenance domain name is testdomain, and the EVC is identified as testevc. In both configurations, the proactive threshold monitoring configuration specifies that when three consecutive connection loss events occur, an SNMP trap notification should be sent. Operation 1 and operation 5 are scheduled to start immediately.

Configuration C


ip sla 1
 ethernet echo mpid 23 domain testdomain vlan 34
!
ip sla reaction-configuration 1 react connectionLoss threshold-type consecutive 3 action-type trapOnly
!
ip sla schedule 1 start-time now

Configuration D


ip sla 5
 ethernet echo mpid 23 domain testdomain evc testevc
!
ip sla reaction-configuration 5 react connectionLoss threshold-type consecutive 3 action-type trapOnly
!
ip sla schedule 5 start-time now

Additional References

Related Documents

Related Topic

Document Title

Cisco IOS commands

Cisco IOS Master Commands List, All Releases

Cisco IOS IP SLAs commands

Cisco IOS IP SLAs Command Reference, All Releases

Cisco IOS IP SLAs: general information

“Cisco IOS IP SLAs Overview” module of the Cisco IOS IP SLAs Configuration Guide.

Multioperation scheduling for IP SLAs

“Configuring Multioperation Scheduling of IP SLAs Operations” module of the Cisco IOS P SLAs Configuration Guide

Proactive threshold monitoring for IP SLAs

“Configuring Proactive Threshold Monitoring of IP SLAs Operations” module of the Cisco IOS IP SLAs Configuration Guide

MIBs

MIBs

MIBs Link

CISCO-RTTMON-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

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