Configuring IP SLAs Metro-Ethernet 3.0 ITU-T Y.1731 Operations

Contents

Configuring IP SLAs Metro-Ethernet 3.0 (ITU-T Y.1731) Operations

Last Updated: April 14, 2011

This module describes how to configure an IP SLAs Metro-Ethernet 3.0 (ITU-T Y.1731) operation to gather the following performance measurements for Ethernet service:

  • Ethernet Delay
  • Ethernet Delay Variation
  • Ethernet Frame Loss Ratio

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.

Restrictions for IP SLAs Metro-Ethernet 3.0 (ITU-T Y.1731)

  • SNMP is not supported for reporting threshold events or collecting performance statistics for IP SLAs Metro-Ethernet 3.0 (ITU-T Y.1731) operations.
  • Continuity Check Message (CCM)-based dual-ended Ethernet frame loss operations are not supported.
  • In a single-ended Ethernet operation, performance measurement statistics can be retrieved only at the device on which the sender Ethernet Connectivity Fault Management (CFM) Maintenance End Point (MEP) is configured.

Information About IP SLAs Metro-Ethernet 3.0 (ITU-T Y.1731) Operations

The IP SLAs Metro-Ethernet 3.0 (ITU-T Y.1731) feature supports key operation and maintenance standards that provide for automated end-to-end management and monitoring of Ethernet service by service providers. The ITU-T Y.1731 networking standard defines performance monitoring measurements such as frame delay, frame delay variation, and frame loss ratio to assist with IP SLAs assurance and capacity planning.

Ethernet Frame Delay (ETH-DM: FD), also known as delay, measures the frame latency from the time the first bit of the synthetic frame is transmitted, to the time the last bit of the frame is received. Delay measurement uses synthetic frames because service frames do not carry timestamps.

Ethernet Frame Delay Variation (ETH-DM: FDV), also known as delay variation, measures the difference between the frame latencies as experienced by two separate frames. The two frames can be either consecutive or separated by an exact number of frames, as specified in the configuration. ITU-T Y.1731 defines the following messages to measure Ethernet delay variation:
  • Delay Measurement Message (DMM)
  • Delay Measurement Reply (DMR)
  • One-Way Delay Measurement (1DM)
Ethernet Frame Loss Ratio (ETH-LM: FLR), also known as frame loss, measures the availability of synthetic frames in the network. Availability is defined in terms of the ratio of frames lost to frames sent, or Frame Loss Ratio (FLR). Near End Loss measures ingress frame loss and the Far End Loss measures egress frame loss. Availability is calculated using either the Near End loss numbers or the Far End loss numbers, or both. ITU-T Y.1731 defines the following messages to measure Ethernet frame loss:
  • Loss Measurement Message (LMM)
  • Loss Measurement Reply (LMR)

In a single-ended operation, a Maintenance End Point (MEP) on the source device acts as both the sender and receiver. The device sends a synthetic frame from the source to the destination and then, upon receiving back a response frame, the MEP on the source device performs the performance measurement calculations. In this operation, statistics can be retrieved only at the source device.

Dual-ended operations are supported for delay and delay-variation performance measurements only. When you start a dual-ended delay operation, the sender MEP on the source device a synthetic frame to the receiver MEP configured on another (destination) device. In this operation, the receiver MEP performs the measurement calculations. However, the statistics can be retrieved by the MEPs at both ends of the operation. Statistics from the operation are retrieved at the destination device through Cisco extensions to the protocol using Y.1731-defined Vendor-Specific Messages/Replies (VSM/VSR). For VSM/VSR in a dual-ended operation to work, the system clocks at the source and destination devices must be synchronized.

All measurements are performed using a point-to-point model between a given pair of MEPs. One-way measurement values are calculated based on the amount time that elapses between when a frame is sent from the MEP on one device, to the time when the frame is received at the MEP on another device. The accuracy of one-way delay calculations depends on close synchronization of the system clocks at the source and destination devices. Two-way measurement values are based on the time difference between when the source MEP transmits a request frame and when it receives a reply frame from the receiver MEP on the destination device, subtracting the time elapsed at the destination.

How to Configure IP SLAs Metro-Ethernet 3.0 (ITU-T Y.1731) Operations

Configuring a Dual-Ended Ethernet Delay or Delay Variation Operation

Perform the tasks for configuring a dual-ended operation in the order presented.


Note


To remove the MEP configurations in an already-configured dual-ended operation, always remove the MEPs in the reverse order in which they were configured. That is, remove the scheduler first, then the threshold monitoring configuration, and then the sender MEP configuration on the source device before removing the scheduler, proactive threshold monitoring, and receiver MEP configuration on the destination device.

Configuring a Receiver MEP on the Destination Device

Before You Begin

Time synchronization is required between the source and destination devices in order to provide accurate one-way delay (latency) or delay-variation measurements. Configure either Precision Time Protocol (PTP) or Network Time Protocol (NTP) on both the source and destination devices.


SUMMARY STEPS

1.    enable

2.    configure terminal

3.    ip sla operation-number

4.    ethernet y1731 delay receive 1DM domain domain-name {evc evc-id | vlan vlan-id} cos cos {mpid source-mp-id | mac-address source-address}

5.    aggregate interval seconds

6.    distribution {delay | delay-variation} one-way number-of-bins boundary[,...,boundary]

7.    frame offset offset-value

8.    history interval intervals-stored

9.    max-delay milliseconds

10.    owner owner-id

11.    end


DETAILED STEPS
 Command or ActionPurpose
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 501

 

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

 
Step 4 ethernet y1731 delay receive 1DM domain domain-name {evc evc-id | vlan vlan-id} cos cos {mpid source-mp-id | mac-address source-address}


Example:

Router(config-ip-sla)# ethernet y1731 delay receive 1DM domain xxx evc yyy cos 3 mpid 101

 
Begins configuring the receiver on the responder and enters IP SLA Y.1731 delay configuration mode.
  • The source-mp-id or source-address configured by this command corresponds to that of the MEP being configured.
 
Step 5 aggregate interval seconds


Example:

Router(config-sla-y1731-delay)# aggregate interval 900

 

(Optional) Configures the length of time during which the performance measurements are conducted and the results stored.

 
Step 6 distribution {delay | delay-variation} one-way number-of-bins boundary[,...,boundary]


Example:

Router(config-sla-y1731-delay)# distribution delay-variation one-way 5 5000,10000,15000,20000,-1

 

(Optional) Specifies measurement type and configures bins for statistics distributions kept.

 
Step 7 frame offset offset-value


Example:

Router(config-sla-y1731-delay)# frame offset 1

 

(Optional) Sets the value for calculating delay variation rates.

 
Step 8 history interval intervals-stored


Example:

Router(config-sla-y1731-delay)# history interval 2

 

(Optional) Sets the number of statistics distributions kept during the lifetime of an IP SLAs Ethernet operation.

 
Step 9 max-delay milliseconds


Example:

Router(config-sla-y1731-delay)# max-delay 5000

 

(Optional) Sets the amount of time an MEP waits for a frame.

 
Step 10 owner owner-id


Example:

Router(config-sla-y1731-delay)# owner admin

 

(Optional) Configures the owner of an IP SLAs operation.

 
Step 11 end


Example:

Router(config-sla-y1731-delay)# end

 

Exits to privileged EXEC mode.

 
What to Do Next

To add proactive threshold conditions and reactive triggering for generating traps, see the "Configuring Proactive Threshold Monitoring" module of the IP SLAs Configuration Guide.

When you are finished configuring proactive threshold monitoring for this MEP, see the "Scheduling IP SLAs Operations" section to schedule the operation.

Configuring the Sender MEP on the Source Router

Before You Begin
  • Time synchronization is required between the source and destination devices in order to provide accurate one-way delay (latency) or delay-variation measurements. Configure either Precision Time Protocol (PTP) or Network Time Protocol (NTP) on both the source and destination devices.
  • The receiver MEP must be configured, including proacive threshold monitoring, and scheduled before you configure the sender MEP.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    ip sla operation-number

4.    ethernet y1731 delay 1DM domain domain-name {evc evc-id | vlan vlan-id} {mpid target-mp-id | mac-address target-address} cos cos {source {mpid source-mp-id | mac-address source-address}}

5.    aggregate interval seconds

6.    frame interval milliseconds

7.    frame size bytes

8.    history interval intervals-stored

9.    owner owner-id

10.    end


DETAILED STEPS
 Command or ActionPurpose
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 500

 

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

 
Step 4 ethernet y1731 delay 1DM domain domain-name {evc evc-id | vlan vlan-id} {mpid target-mp-id | mac-address target-address} cos cos {source {mpid source-mp-id | mac-address source-address}}


Example:

Router(config-ip-sla)# ethernet y1731 delay 1DM domain xxx evc yyy mpid 101 cos 3 source mpid 100

 

Begins configuring a dual-ended Ethernet delay operation and enters IP SLA Y.1731 delay configuration mode.

 
Step 5 aggregate interval seconds


Example:

Router(config-sla-y1731-delay)# aggregate interval

 

(Optional) Configures the length of time during which the performance measurements are conducted and the results stored.

 
Step 6 frame interval milliseconds


Example:

Router(config-sla-y1731-delay)# frame interval 100

 

(Optional) Sets the gap between successive frames.

 
Step 7 frame size bytes


Example:

Router(config-sla-y1731-delay)# frame size 64

 

(Optional) Sets the padding size for frames.

 
Step 8 history interval intervals-stored


Example:

Router(config-sla-y1731-delay)# history interval 2

 

(Optional) Sets the number of statistics distributions kept during the lifetime of an IP SLAs Ethernet operation.

 
Step 9 owner owner-id


Example:

Router(config-sla-y1731-delay)# owner admin

 

(Optional) Configures the owner of an IP SLAs operation.

 
Step 10 end


Example:

Router(config-sla-y1731-delay)# end

 

Exits to privileged EXEC mode.

 
What to Do Next

To add proactive threshold conditions and reactive triggering for generating traps, see the "Configuring Proactive Threshold Monitoring" module of the IP SLAs Configuration Guide.

When you are finished configuring proactive threshold monitoring for this MEP, see the "Scheduling IP SLAs Operations" section to schedule the operation.

Configuring a Sender MEP for a Single-Ended Ethernet Delay or Delay Variation Operation

Perform this task to configure a sender MEP on the source device.

Before You Begin
  • Time synchronization is required between the source and destination devices in order to provide accurate one-way delay (latency) or delay-variation measurements. Configure either Precision Time Protocol (PTP) or Network Time Pprotocol (NTP) on both the source and destination devices.

Note


To display information about remote (target) MEPs on destination devices, use the show ethernet cfm maintenance-points remote command.

SUMMARY STEPS

1.    enable

2.    configure terminal

3.    ip sla operation-number

4.    ethernet y1731 delay dmm domain domain-name {evc evc-id | vlan vlan-id} {mpid target-mp-id | mac-address target-address} cos cos {source {mpid source-mp-id | mac-address source-address}}

5.    clock sync

6.    aggregate interval seconds

7.    distribution {delay | delay-variation} one-way number-of-bins boundary[,...,boundary]

8.    frame interval milliseconds

9.    frame offset offset-value

10.    frame size bytes

11.    history interval intervals-stored

12.    max-delay milliseconds

13.    owner owner-id

14.    end


DETAILED STEPS
 Command or ActionPurpose
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 configuring an IP SLAs operation and enters IP SLA configuration mode.

 
Step 4 ethernet y1731 delay dmm domain domain-name {evc evc-id | vlan vlan-id} {mpid target-mp-id | mac-address target-address} cos cos {source {mpid source-mp-id | mac-address source-address}}


Example:

Router(config-ip-sla)# ethernet y1731 delay dmm domain xxx evc yyy mpid 101 cos 4 source mpid 100

 

Begins configuring a single-ended Ethernet delay operation and enters IP SLA Y.1731 delay configuration mode.

 
Step 5 clock sync


Example:

Router(config-sla-y1731-delay)# clock sync

 

(Optional) Indicates that the end points are synchronized and thus allows the operation to calculate one-way delay measurements.

 
Step 6 aggregate interval seconds


Example:

Router(config-sla-y1731-delay)# aggregate interval 900

 

(Optional) Configures the length of time during which the performance measurements are conducted and the results stored.

 
Step 7 distribution {delay | delay-variation} one-way number-of-bins boundary[,...,boundary]


Example:

Router(config-sla-y1731-delay)# distribution delay-variation one-way 5 5000, 10000,15000,20000,-1

 

(Optional) Specifies measurement type and configures bins for statistics distributions kept.

 
Step 8 frame interval milliseconds


Example:

Router(config-sla-y1731-delay)# frame interval 100

 

(Optional) Sets the gap between successive frames.

 
Step 9 frame offset offset-value


Example:

Router(config-sla-y1731-delay)# frame offset 1

 

(Optional) Sets value for calculating delay variation values.

 
Step 10 frame size bytes


Example:

Router(config-sla-y1731-delay)# frame size 32

 

(Optional) Configures padding size for frames.

 
Step 11 history interval intervals-stored


Example:

Router(config-sla-y1731-delay)# history interval 2

 

(Optional) Sets the number of statistics distributions kept during the lifetime of an IP SLAs Ethernet operation.

 
Step 12 max-delay milliseconds


Example:

Router(config-sla-y1731-delay)# max-delay 5000

 

(Optional) Sets the amount of time an MEP waits for a frame.

 
Step 13 owner owner-id


Example:

Router(config-sla-y1731-delay)# owner admin

 

(Optional) Configures the owner of an IP SLAs operation.

 
Step 14 end


Example:

Router(config-sla-y1731-delay)# end

 

Exits to privileged EXEC mode.

 
What to Do Next

To add proactive threshold conditions and reactive triggering for generating traps, see the "Configuring Proactive Threshold Monitoring" module of the IP SLAs Configuration Guide.

When you are finished configuring proactive threshold monitoring for this operation, see the "Scheduling IP SLAs Operations" section to schedule the operation.

Configuring a Sender MEP for a Single-Ended Ethernet Frame Loss Ratio Operation


Note


To display information about remote (target) MEPs on destination devices, use the show ethernet cfm maintenance-points remote command.

Perform this task to configure a sender MEP on the source device.

Before You Begin
  • Class of Service (CoS)-level monitoring must be enabled on MEPs associated to the Ethernet frame loss operation by using the monitor loss counter command on the devices at both ends of the operation. See the Cisco IOS Carrier Ethernet Command Reference for command information. See the "Configuration Examples for IP SLAs Metro-Ethernet 3.0 (ITU-T Y.1731) Operations" section for configuration information.


    Note


    Cisco IOS Y.1731 implementation allows monitoring of frame loss for frames on an EVC regardless of the CoS value (any CoS or Aggregate CoS cases). See the "Configuration Examples for IP SLAs Metro-Ethernet 3.0 (ITU-T Y.1731) Operations" section for configuration information.



SUMMARY STEPS

1.    enable

2.    configure terminal

3.    ip sla operation-number

4.    ethernet y1731 loss LMM domain domain-name {evc evc-id | vlan vlan-id} {mpid target-mp-id | mac-address target-address} CoS CoS {source {mpid source-mp-id | mac-address source-address}}

5.    aggregate interval seconds

6.    availability algorithm {sliding-window | static-window}

7.    frame consecutive value

8.    frame interval milliseconds

9.    history interval intervals-stored

10.    owner owner-id

11.    exit

12.    exit

13.    ip sla reaction-configuration operation-number {react {unavailableDS | unavailableSD} [threshold-type {average [number-of-measurements] | consecutive [occurrences] | immediate}] [threshold-value upper-threshold lower-threshold]

14.    ip sla logging traps

15.    exit


DETAILED STEPS
 Command or ActionPurpose
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 11

 

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

 
Step 4 ethernet y1731 loss LMM domain domain-name {evc evc-id | vlan vlan-id} {mpid target-mp-id | mac-address target-address} CoS CoS {source {mpid source-mp-id | mac-address source-address}}


Example:

Router(config-ip-sla)# ethernet y1731 loss LMM domain xxx vlan 12 mpid 34 CoS 4 source mpid 23

 

Begins configuring a single-ended Ethernet frame loss ratio operation and enters IP SLA Y.1731 loss configuration mode.

 
Step 5 aggregate interval seconds


Example:

Router(config-sla-y1731-loss)# aggregate interval 900

 

(Optional) Configures the length of time during which performance measurements are conducted and the results stored.

 
Step 6 availability algorithm {sliding-window | static-window}


Example:

Router(config-sla-y1731-loss)# availability algorithm static-window

 

(Optional) Specifies availability algorithm used.

 
Step 7 frame consecutive value


Example:

Router(config-sla-y1731-loss)# frame consecutive 10

 

(Optional) Specifies number of consecutive measurements to be used to determine availability or unavailability status.

 
Step 8 frame interval milliseconds


Example:

Router(config-sla-y1731-loss)# frame interval 100

 

(Optional) Sets the gap between successive frames.

 
Step 9 history interval intervals-stored


Example:

Router(config-sla-y1731-loss)# history interval 2

 

(Optional) Sets the number of statistics distributions kept during the lifetime of an IP SLAs Ethernet operation.

 
Step 10 owner owner-id


Example:

Router(config-sla-y1731-delay)# owner admin

 

(Optional) Configures the owner of an IP SLAs operation.

 
Step 11 exit


Example:

Router(config-sla-y1731-delay)# exit

 

Exits to IP SLA configuration mode.

 
Step 12 exit


Example:

Router(config-ip-sla)# exit

 

Exits to global configuration mode.

 
Step 13 ip sla reaction-configuration operation-number {react {unavailableDS | unavailableSD} [threshold-type {average [number-of-measurements] | consecutive [occurrences] | immediate}] [threshold-value upper-threshold lower-threshold]


Example:

Router(config)# ip sla reaction-configuration 11 react unavailableDS

 

(Optional) Configures proactive threshold monitoring for frame loss measurements.

 
Step 14 ip sla logging traps


Example:

Router(config)# ip sla logging traps

 

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

 
Step 15 exit


Example:

Router(config)# exit

 

Exits to privileged EXEC mode.

 
What to Do Next

When you are finished configuring this MEP, see the "Scheduling IP SLAs Operations" section to schedule the operation.

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 ActionPurpose
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.

 

Configuration Examples for IP SLAs Metro-Ethernet 3.0 (ITU-T Y.1731) Operations

Example: Dual-Ended Ethernet Delay Operation

The following sample output shows the configuration, including default values, of a receiver MEP on the responder device for a dual-ended Ethernet delay or delay variation operation:

Router# show ip sla configuration 501 

IP SLAs Infrastructure Engine-III
Entry number: 501
Owner: admin
Tag: 
Operation timeout (milliseconds): 5000
Ethernet Y1731 Delay Operation
Frame Type: 1DM
Domain: xxx
ReceiveOnly: TRUE
Evc: yyy
Local Mpid: 101
CoS: 3
   Max Delay: 5000
Threshold (milliseconds): 5000
.
.
.
Statistics Parameters
  Aggregation Period: 900
  Frame offset: 1
  Distribution Delay One-Way: 
   Number of Bins 10
   Bin Boundaries: 5000,10000,15000,20000,25000,30000,35000,40000,45000,-1
  Distribution Delay-Variation One-Way: 
   Number of Bins 10
   Bin Boundaries: 5000,10000,15000,20000,25000,30000,35000,40000,45000,-1
History
  Number of intervals: 2
 
      

The following sample output shows the configuration, including default values, of the sender MEP for a dual-ended IP SLAs Ethernet delay or delay variation operation:

Router# show ip sla configuration 500 

IP SLAs Infrastructure Engine-III
Entry number: 500
Owner: 
Tag: 
Operation timeout (milliseconds): 5000
Ethernet Y1731 Delay Operation
Frame Type: 1DM
Domain: yyy
ReceiveOnly: FALSE
Evc: xxx
Target Mpid: 101
Source Mpid: 100
CoS: 3
   Request size (Padding portion): 64
   Frame Interval: 1000
Threshold (milliseconds): 5000
.
.
.
Statistics Parameters
  Aggregation Period: 900
  Frame offset: 1
History
  Number of intervals: 22

Example: Sender MEP for a Single-Ended Ethernet Delay Operation

The following sample output shows the configuration, including default values, of the sender MEP for a single-ended IP SLAs Ethernet delay operation:

Router# show ip sla configuration 10 

IP SLAs Infrastructure Engine-III
Entry number: 10
Owner: 
Tag: 
Operation timeout (milliseconds): 5000
Ethernet Y1731 Delay Operation
Frame Type: DMM
Domain: xxx
Vlan: yyy
Target Mpid: 101
Source Mpid: 100
CoS: 4
   Max Delay: 5000
   Request size (Padding portion): 64
   Frame Interval: 1000
   Clock: Not In Sync
Threshold (milliseconds): 5000
.
.
.
Statistics Parameters
  Aggregation Period: 900
  Frame offset: 1
  Distribution Delay Two-Way: 
   Number of Bins 10
   Bin Boundaries: 5000,10000,15000,20000,25000,30000,35000,40000,45000,-1
  Distribution Delay-Variation Two-Way: 
   Number of Bins 10
   Bin Boundaries: 5000,10000,15000,20000,25000,30000,35000,40000,45000,-1
History
  Number of intervals: 2
      

Example: CoS-Level Monitoring for MEPs in Single-Ended Ethernet Frame Loss Ratio Operation

You must enable CoS-level monitoring for the sender and destination MEPs associated with an IP SLAs Metro-Ethernet 3.0 (ITU-T Y.1731) frame loss probe. The following sample output shows how to configure probe-monitoring frames on an EVC with CoS 5:

Router-1# show running interface gigabitethernet2/3

interface GigabitEthernet2/3
 service instance 101 ethernet evc-sample-1
  encapsulation dot1q 777
  rewrite ingress tag pop 1 symmetric
  xconnect 102.102.102.102 777777 encapsulation mpls
  cfm mep domain md-sample mpid 1
   monitor loss counter priority 5

The following sample output shows how to configure an MEP for monitoring frame loss for frames on an EVC regardless of the CoS value (any CoS or Aggregate CoS cases).

Router-1# show running interface gigabitethernet2/3

interface GigabitEthernet2/3
 service instance 102 ethernet evc-sample-2
  encapsulation dot1q 888
  rewrite ingress tag pop 1 symmetric
  xconnect 102.102.102.102 888888 encapsulation mpls
  cfm mep domain md-sample mpid 1
   COS 5
   monitor loss counter

Example: Sender MEP for a Single-Ended Ethernet Frame Loss Operation

The following output shows the configuration, including default values, of the sender MEP in a basic single-ended IP SLAs Ethernet frame loss ratio operation with a start-time of now:

Router# show ip sla configuration 11 

IP SLAs Infrastructure Engine-III
Entry number: 11
Owner: 
Tag: 
Operation timeout (milliseconds): 5000
Ethernet Y1731 Loss Operation
Frame Type: LMM
Domain: xxx
Vlan: 12
Target Mpid: 34
Source Mpid: 23
CoS: 4
   Request size (Padding portion): 0
   Frame Interval: 1000
Schedule:
   Operation frequency (seconds): 60  (not considered if randomly scheduled)
   Next Scheduled Start Time: Start Time already passed
   Group Scheduled : FALSE
   Randomly Scheduled : FALSE
   Life (seconds): 3600
   Entry Ageout (seconds): never
   Recurring (Starting Everyday): FALSE
   Status of entry (SNMP RowStatus): ActiveThreshold (milliseconds): 5000
Statistics Parameters
  Aggregation Period: 900
  Frame consecutive: 10
  Availability algorithm: static-window
History
  Number of intervals: 2
      

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

Ethernet CFM

“Configuring Ethernet Connectivity Fault Management in a Service Provider Network” module of the Cisco IOS Carrier Ethernet Configuration Guide

Network Time Protocol (NTP)

“Configuring NTP” module of the Cisco IOS Network Management Configuration Guide

Proactive threshold monitoring for Cisco IOS IP SLAs

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

Standards and RFCs

Standard/RFC Title

ITU-T Y.1731

OAM functions and mechanisms for Ethernet-based networks

No specific RFCs are supported by the features in this document.

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MIBs

MIB MIBs Link

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 Metro-Ethernet 3.0 (ITU-T Y.1731) 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 Metro-Ethernet 3.0 (ITU-T Y.1731)
Feature Name Releases Feature Information

IP SLAs Metro-Ethernet 3.0 (ITU-T Y.1731)

15.1(2)S

This feature provides the capability to gather Ethernet-layer network performance metrics, such as frame delay, frame delay variation, and frame loss ratio (as defined by the ITU-T Y.1737 networking standard), for assisting with IP SLAs assurance and capacity planning .

The following commands were introduced or modified: aggregate interval, availability, distribution, ethernet y1731 delay, ethernet y1731 delay receive, ethernet y1731 loss , frame consecutive, frame interval, frame offset, frame size, history interval, ip sla reaction-configuration, max-delay, owner, show ip sla history interval.

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.