ME 3800x and ME 3600x Switches Software Configuration Guide, Release 15.2(4)S
Configuring Y.1731 Performance Monitoring
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Y.1731 Performance Monitoring

Table Of Contents

Y.1731 Performance Monitoring

Understanding Y.1731 Performance Monitoring

Connectivity

Frame Delay and Frame Delay Variation

Frame Loss Ratio and Availability

Supported Interfaces

Restrictions and Usage Guidelines

Configuring Y.1731 PM

Configuring Two-Way Delay Measurement

Configuration Example

Configuring Single Ended Synthetic Loss Measurement

Configuration Example

Verifying the Frame Delay and Synthetic Loss Measurement Configurations

Troubleshooting


Y.1731 Performance Monitoring


This chapter describes how to configure the Y.1731 Performance Monitoring in Cisco IOS Software Release 15.2(4)S.

This chapter includes the following sections:

Understanding Y.1731 Performance Monitoring

Configuring Y.1731 PM

Understanding Y.1731 Performance Monitoring

When service providers sell connectivity services to a subscriber, a Service Level Agreement (SLA) is reached between the buyer and seller of the service. The SLA defines the attributes offered by a provider and serves as a legal obligation on the service provider. As the level of performance required by subscribers increases, service providers need to monitor the performance parameters being offered. In order to capture the needs of the service providers, organizations have defined various standards such as IEEE 802.1ag and ITU-T Y.1731 that define the methods and frame formats used to measure performance parameters.

Y.1731 Performance Monitoring (PM) provides a standard ethernet PM function that includes measurement of ethernet frame delay, frame delay variation, frame loss, and frame throughput measurements specified by the ITU-T Y-1731 standard and interpreted by the Metro Ethernet Forum (MEF) standards group. As per recommendations, the ME 3600X and ME3800X switches should be able to send, receive and process PM frames in intervals of 1000ms (1 frame per second) with the maximum recommended transmission period being 1000ms (1 frame per second) for any given service.

To measure SLA parameters such as frame delay or frame delay variation, a small number of synthetic frames are transmitted along with the service to the end point of the maintenance region, where the Maintenance End Point (MEP) responds to the synthetic frame. For a function such as connectivity fault management, the messages are sent less frequently, while performance monitoring frames are sent more frequently.

Figure 47-1 illustrates Maintenance Entities (ME) and Maintenance End Points (MEP) typically involved in a point-to-point metro ethernet deployment for the Y.1731 standard.

Figure 47-1 A Point-to-Point Metro Ethernet Deployment with Typical Maintenance Entities and Maintenance Points

Following are the performance monitoring parameters:

Connectivity

Frame Delay and Frame Delay Variation

Frame Loss Ratio and Availability

Connectivity

The first step to performance monitoring is verifying the connectivity. Continuity Check Messages (CCM) are best suited for connectivity verification, but is optimized for fault recovery operation. It is usually not accepted as a component of an SLA due to the timescale difference between SLA and Fault recovery. Hence, Connectivity Fault Management (CFM) and Continuity Check Database (CCDB) are used to verify connectivity. For more information on CFM see: Configuring Ethernet OAM, CFM, and E-LMI

Frame Delay and Frame Delay Variation

Ethernet frame Delay Measurement (ETH-DM) is used for on-demand ethernet Operations, Administration & Maintenance (OAM) to measure frame delay and frame delay variation.

Ethernet frame delay and frame delay variation are measured by sending periodic frames with ETH-DM information to the peer MEP and receiving frames with ETH-DM information from the peer MEP. During the interval, each MEP measures the frame delay and frame delay variation.

Ethernet frame delay measurement also collects useful information, such as worst and best case delays, average delay, and average delay variation. Ethernet frame delay measurement supports hardware-based timestamping in the ingress direction. It provides a runtime display of delay statistics during a two-way delay measurement. Ethernet frame delay measurement records the last 100 samples collected per remote Maintenance End Point (MEP) or per CFM session.

These are the two methods of delay measurement, as defined by the ITU-T Y.1731 standard, One-way ETH-DM and Two-way ETH-DM. However only Two-way ETH-DM is supported on the switch.

Two-way ETH-DM:
Each MEP transmits frames with ETH-DM request information to its peer MEP and receives frames with ETH-DM reply information from its peer MEP. Two way frame delay and frame delay variation is measured using DMM and DMR frame.

These are the pre-requisites for 1DM measurements:

The clocks of the two concerned end-points must be synchronized accurately and precisely. This is achieved through IEEE 1588-2002.

There is no auto-session create supported on the peer or the receiver. You need to configure an receive-only session.

You must configure all the create sessions on the receiver's datapath. These are passive listener sessions.

Frame Loss Ratio and Availability

Ethernet Synthetic Loss Measurement (ETH-SLM) is used to collect counter values applicable for ingress and egress synthetic frames where the counters maintain a count of transmitted and received synthetic frames between a pair of MEPs.

ETH-SLM transmits synthetic frames with ETH-SLM information to a peer MEP and similarly receives synthetic frames with ETH-SLM information from the peer MEP. Each MEP performs frame loss measurements which contribute to unavailable time. A near-end frame loss refers to frame loss associated with ingress data frames. Far-end frame loss refers to frame loss associated with egress data frames. Both near-end and far-end frame loss measurements contribute to near-end severely errored seconds and far end severely errored seconds which together contribute to unavailable time. ETH-SLM is measured using SLM and SLR frames.

There are the two methods of frame loss measurement, defined by the ITU-T Y.1731 standard ETH-LM and ETH-SLM, however only Single-ended ETH-SLM is supported:

Single-ended ETH-SLM: Each MEP transmits frames with the ETH-SLM request information to its peer MEP and receives frames with ETH-SLM reply information from its peer MEP to carry out synthetic loss measurements.

Supported Interfaces

Y.1731 PM supports these interfaces:

SLM and DMM support on EVC BD OFM

SLM and DMM support on PC EVC BD OFM

SLM and DMM support on EVC Xconnect OFM

SLM and DMM support on PC EVC Xconnect OFM

SLM and DMM support on EVC BD IFM

SLM and DMM support on PC EVC BD IFM

SLM and DMM support on EVC Xconnect IFM

SLM and DMM support on PC EVC Xconnect IFM


Note PM is supported in the EVC and CFM configurations mentioned above, with both Dot1q and QinQ encapsulations available on the EVC.


Restrictions and Usage Guidelines

Follow these restrictions and usage guidelines when you configure Y.1731 PM on the switch:

Y.1731 PM is not supported on these interfaces:

mLACP

Switchport Upward facing MEP and Downward facing MEP

Port MEPs

L2VFI

SNMP is supported as a read only object, although CLI and system-logging is supported. The reaction syslogs can be converted to traps using the Syslog Traps MIB

Frame Throughput measurements are not supported

Clock synchronization is not mandatory for Two-way Delay Measurement

These are the restrictions for PM support on Port-channel:

Adding or deleting a member link renders the session invalid.

PM is not supported on manual PC EVC Load balancing configuration (UNI LAG).

Configuring Y.1731 PM

Configuring Two-Way Delay Measurement

To configure a Two-Way Delay Measurement, complete these steps:

 
Command
Purpose

Step 1 

enable

Enables privileged EXEC mode. Enter your password if prompted.

Step 2 

configure terminal

Enters global configuration mode.

Step 3 

ip sla n

Enables the IP SLA configuration.

Step 4 

ethernet y1731 delay DMM domain domain {{vlan | evc} value}{mpid | mac-address} value cos value source {mpid | mac-address} value

Configures a two-way delay measurement on the sender.

evc - Specifies the ethernet virtual circuit identifier

vlan - Specifies the VLAN.

cos - Specifies the class of service. The values ranges between 0 and 7.

mpid - Specifies the destination MP ID. The values ranges between 1 and 8191.

mac-address - Specifies the destination mac-address.

source - Specifies the source MP ID or mac-address.

Step 5 

frame {interval | offset | size} value

Configures Y.1731 frame parameters such as:

interval - Specifies the number of intervals.

offset - Specifies the frame offset to be used for calculations. The values ranges between 1 and 10.

size - Specifies the frame size. The values ranges between 64 and 384.

Step 6 

history {interval} value

Configures Y.1731 history parameters such as:

interval - Specifies the number of intervals. The number of intervals ranges between 1 and 10.

Step 7 

aggregate {interval} value

Configures Y.1731 aggregation parameters such as:

interval - Specifies the number of intervals. The aggregation period in seconds ranges between 1 and 65535.

Step 8 

distribution {delay | delay-variation} {one-way | two-way} value

Configures Y.1731 distribution parameters such as:

delay - Specifies delay distribution parameters.

delay-variation - Specifies delay-variation distribution parameters.

one-way - Specifies one-way distribution parameters.

two-way - Specifies two-way distribution parameters.

Step 9 

clock sync

Checks whether the clocks are synchronized on the sender and receiver.

Step 10 

max-delay value

Configures the maximum delay in milliseconds. The value ranges between 1 and 65535.

Step 11 

owner value

Specifies the operation owner.

Step 12 

exit

Exits the Y.1731 submode and enters the global configuration mode.

Step 13 

ip sla schedule n {life | ageout | recurring | start-time} value start-time start time

Schedules the two way delay measurement on the sender.

Life - Specifies the period time to execute in seconds.

Ageout - Specifies the period time to keep the entry when inactive.

Recurring - Specifies the probe to be scheduled automatically every day.

Start-time - Specifies the time to start the entry. The options available are:

after

hh:mm

hh:mm:ss

now

pending

Step 14 

exit

Exits the global configuration mode.

Configuration Example

The following example configures a two way frame delay measurement

Switch# enable
Switch# configure terminal
Switch(config)# ip sla 1
Switch(config-ip-sla)# ethernet y1731 delay DMM domain ifm_400 evc e1 mpid 401 cos 4 
source mpid 1
Switch(config-sla-y1731-delay)# history interval 5
Switch(config-sla-y1731-delay)# aggregate interval 60
Switch(config-sla-y1731-delay)#exit
Switch(config)#ip sla schedule 1 start-time after 00:00:30
Switch(config)#exit
 
   

Configuring Single Ended Synthetic Loss Measurement

To configure single ended synthetic loss measurement, complete these steps:


Note Before you begin, configure the command monitor loss counter [priority cos range] under the EVC CFM sub-config mode for those interfaces that require loss monitoring.


 
Command
Purpose

Step 1 

enable

 
        

Enables privileged EXEC mode. Enter your password if prompted.

Step 2 

configure terminal

Enters global configuration mode.

Step 3 

ip sla n

Enables the IP SLA configuration.

Step 4 

ethernet y1731 loss SLM domain domain {{vlan | evc} value}{mpid | mac-address} value cos value source {mpid | mac-address} value

Configures single ended frame loss measurement on the sender.

evc - Specifies the ethernet virtual circuit identifier

vlan - Specifies the VLAN.

cos - Specifies the class of service. The values ranges between 0 and 7. The cos value 7 is for aggregated cos and is used when LMM is configured for routed port sub interface.

mpid - Specifies the destination MP ID. The values ranges between 1 and 8191.

mac-address - Specifies the destination mac-address.

source - Specifies the source MP ID or mac-address.

Step 5 

aggregate {interval} value

Configures the Y.1731 aggregation parameters such as:

interval - Specifies the number of intervals. The aggregation period in seconds ranges between 1 and 65535.

Step 6 

frame consecutive value

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

Step 7 

frame consecutive loss-ratio value

Specifies the number of frames over which to calculate frame-loss ratio.

Step 8 

owner value

Specifies the operation owner.

Step 9 

exit

Exits the Y.1731 submode and enters the global configuration mode.

Step 10 

exit

Exits the global configuration mode.

Step 11 

ip sla n

Enables the IP SLA configuration.

Step 12 

ethernet y1731 loss SLM [burst] domain domain {{vlan | evc} value}{mpid | mac-address} value cos value source {mpid | mac-address} value

Configures single ended frame loss measurement on the sender.

burst - Specifies the number of frames to be sent in the cycle.

evc - Specifies the ethernet virtual circuit identifier

vlan - Specifies the VLAN.

cos - Specifies the class of service. The values ranges between 0 and 7. The cos value 7 is for aggregated cos and is used when LMM is configured for routed port sub interface.

mpid - Specifies the destination MP ID. The values ranges between 1 and 8191.

mac-address - Specifies the destination mac-address.

source - Specifies the source MP ID or mac-address.

Step 13 

frequency seconds

Configures the frequency of the burst cycles in seconds. The range is 1 to 900.

Step 14 

aggregate {interval} burst-cycles value

Configures the Y.1731 aggregation parameters such as:

interval - Specifies the number of intervals. The aggregation period in seconds ranges between 1 and 65535.

burst-cycles - Specifies number of burst-cycles.

Step 15 

frame consecutive value

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

Step 16 

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

Configures proactive threshold monitoring for frame loss measurements.

Step 17 

ip sla schedule n {life | ageout | recurring | start-time} value start-time start time

Schedules the single ended frame loss measurement on sender.

Life - Specifies the length of time to execute in seconds.

Ageout - Specifies the length of time to keep the entry when inactive.

Recurring - Specifies automatic scheduling every day.

Start-time - Specifies the time to start the entry. The options available are:

after

hh:mm

hh:mm:ss

now

pending

Configuration Example

This example displays the configuration of single ended frame loss measurement:

Switch# enable
Switch# configure terminal
Switch(config)# ip sla 1
Switch(config-ip-sla)# ethernet y1731 loss SLM domain r3 vlan 10 mpid 3 cos 1 source mpid 
1
Switch(config-sla-y1731-loss)# aggregate interval 35
Switch(config-sla-y1731-loss)# frame consecutive 4
Switch(config-sla-y1731-loss)# frame consecutive loss-ratio 7
Switch(config-sla-y1731-loss)# exit
Switch(config-ip-sla)# exit
Switch(config)# ip sla 2
Switch(config-ip-sla)# ethernet y1731 loss SLM burst domain r3 vlan 10 mpid 3 cos 2 source 
mpid 1
Switch(config-sla-y1731-loss)# frequency 20
Switch(config-sla-y1731-loss)# aggregate interval burst-cycles 6
Switch(config-sla-y1731-loss)# frame consecutive 4
Switch(config-sla-y1731-loss)# exit
Switch(config-ip-sla)# exit
Switch(config-ip-sla)# exit
Switch(config-ip-sla)# ip sla reaction-configuration 1 react loss-ratioSD threshold-type 
immediate threshold-value 55 50
Switch(config-ip-sla)# ip sla reaction-configuration 2 react loss-ratioDS threshold-type 
immediate threshold-value 55 50
Switch(config-ip-sla)# exit
Switch(config)# ip sla schedule 1 life forever start-time now
Switch(config)# ip sla schedule 2 life forever start-time now

Switch(config)# exit

 
   

Verifying the Frame Delay and Synthetic Loss Measurement Configurations

To verify configuration of SLM use this command in privileged EXEC mode:

Switch# show run | b ip sla
ip sla 102
ethernet y1731 loss SLM domain PROVIDER_DOMAIN_VLAN evc domain_vlan101@101 mpid 101 cos 2 
source mpid 102
aggregate interval 20
ip sla 103
ethernet y1731 loss SLM burst domain PROVIDER_DOMAIN_VLAN evc domain_vlan101@101 mpid 101 
cos 2 source mpid 102
frequency 20
availability algorithm static-window
ip sla schedule 103 start-time now
ip sla enable reaction-alerts
!
!
!
control-plane
!
!
line con 0
password lab
login
line vty 0 4
password lab
login
 
   
Switch# show ip sla configuration
IP SLAs Infrastructure Engine-III
Entry number: 102
Owner:
Tag:
Operation timeout (milliseconds): 0
Ethernet Y1731 Loss Operation
Frame Type: SLM
Domain: PROVIDER_DOMAIN_VLAN
Evc: domain_vlan101@101
Target Mpid: 101
Source Mpid: 102
CoS: 2
Request size (Padding portion): 64
Frame Interval: 1000
Schedule:
Operation frequency (seconds): 20 (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): Active
Threshold (milliseconds): 0
Statistics Parameters
Aggregation Period: 20
Frame consecutive: 10
Frame consecutive loss-ratio: 10
Availability algorithm: sliding-window
History
Number of intervals: 2
 
   
Entry number: 103
Owner:
Tag:
Operation timeout (milliseconds): 0
Ethernet Y1731 Loss Operation
Frame Type: SLM
Domain: PROVIDER_DOMAIN_VLAN
Evc: domain_vlan101@101
Target Mpid: 101
Source Mpid: 102
CoS: 2
Request size (Padding portion): 64
Frame Interval: 1000
Frame Burst Number: 10
Schedule:
Operation frequency (seconds): 20 (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): Active
Threshold (milliseconds): 0
Statistics Parameters
Aggregate interval burst-cycles: 1
Frame consecutive: 10
Frame consecutive loss-ratio: 10
Availability algorithm: static-window
History
Number of intervals: 2
 
   

To verify and monitor the frame delay and frame delay variation measurement configuration, use this command in privileged EXEC mode:

Switch# show ip sla statistics n
Delay Statistics for       Operation n
Type of operation: Y1731 Delay Measurement
Latest operation start time: *21:37:08.895 PST Thu Aug 20 2009
Latest operation return code: 
Distribution Statistics:
Interval <n>
  Start time: 
  Elapsed/End time:
  Number of measurements initiated: <x>
  Number of measurements completed: <x>
  Flag: OK
  Delay:
   Max/Avg/Min forward: x/y/z     -> Min is only shown if clocks are in sync    
   Max/Avg/Min backward: x/y/z    -> Only for two-way
   Max/Avg/Min: x/y/z            -> Only for two-way
   Timestamps forward: Max - 21:37:08.895 PST Thu Aug 20 2009/Min - 21:37:08.995 PST Thu 
Aug 20 2009
   Timestamps backward: Max - xxx/Min - yyy
   Timestamps: Max - xxx/Min - yyy
   Bucket Forward:
    Bucket Range: 0-9 ms:
     Total observations: <x> 
    Bucket Range: 10-19 ms:
     Total observations: <x> 
    Bucket Range: 20-29 ms:
     Total observations: <x> 
    Bucket Range: 30-39 ms:
     Total observations: <x> 
   Delay Variance
    Max/Avg/Min forward: x/y/z     -> Min is only shown if clocks are in sync     
    Max/Avg/Min backward: x/y/z    -> Only for two-way
    Max/Avg/Min: x/y/z             -> Only for two-way
    Bucket Forward:
     Bucket Range: 0-9 ms:
      Total observations: <x> 
     Bucket Range: 10-19 ms:
      Total observations: <x> 
     Bucket Range: 20-29 ms:
      Total observations: <x> 
     Bucket Range: 30-39 ms:
      Total observations: <x> 
Operation time to live: Forever
 
   

To display all details of frame delay and frame delay variation measurements, use the show ip sla statistics detail command.

Switch# show ip sla statistics detail
IPSLAs Latest Operation Statistics
IPSLA operation id: 3
Delay Statistics for Y1731 Operation 3
Type of operation: Y1731 Delay Measurement
Latest operation start time: *00:00:00.000 PST Mon Jan 1 1900
Latest operation return code: OK
Distribution Statistics:
Interval 1
 Type: Delay
 Start time:  *00:00:00.000 PST Mon Jan 1 1900
 Elapsed/End time:  *00:00:00.000 PST Mon Jan 1 1900
 Number of measurements initiated: 0
 Number of measurements completed: 0
 Flag: OK
 
   
 
   
Delay:
 Max/Avg/Min TwoWay: 140116936/140116944/140116952
 Timestamps TwoWay: Max - *00:00:00.000 PST Mon Jan 1 1900/Min - *00:00:00.000 PST Mon Jan 
1 1900
 
   
 Bucket forward:
  Bucket Range: 0-4999 microsecond
   Total observations: 0
  Bucket Range: 5000-9999 microsecond
   Total observations: 0
  Bucket Range: 10000-14999 microsecond
   Total observations: 0
  Bucket Range: 15000-19999 microsecond
   Total observations: 0
  Bucket Range: 20000-24999 microsecond
   Total observations: 0
  Bucket Range: 25000-29999 microsecond
   Total observations: 0
  Bucket Range: 30000-34999 microsecond
   Total observations: 0
  Bucket Range: 35000-39999 microsecond
   Total observations: 0
  Bucket Range: 40000-44999 microsecond
   Total observations: 0
  Bucket Range: 45000--2 microsecond
   Total observations: 0
 
   
 Bucket backward:
  Bucket Range: 0-4999 microsecond
   Total observations: 0
  Bucket Range: 5000-9999 microsecond
   Total observations: 0
  Bucket Range: 10000-14999 microsecond
   Total observations: 0
  Bucket Range: 15000-19999 microsecond
   Total observations: 0
  Bucket Range: 20000-24999 microsecond
   Total observations: 0
  Bucket Range: 25000-29999 microsecond
   Total observations: 0
  Bucket Range: 30000-34999 microsecond
   Total observations: 0
  Bucket Range: 35000-39999 microsecond
   Total observations: 0
  Bucket Range: 40000-44999 microsecond
   Total observations: 0
  Bucket Range: 45000--2 microsecond
   Total observations: 0
 
   
 Bucket TwoWay:
  Bucket Range: 0-0 microsecond
   Total observations: 0
  Bucket Range: 1-1 microsecond
   Total observations: 0
  Bucket Range: 2-2 microsecond
   Total observations: 0
  Bucket Range: 3-3 microsecond
   Total observations: 0
  Bucket Range: 4--2 microsecond
   Total observations: 0
 
   
Delay Variance:
 Max/Avg backward positive: 140116936/140116944
 Timestamp backward positive: Max - *00:00:00.000 PST Mon Jan 1 1900
 Max/Avg backward negative: 140116936/140116944
 Timestamp backward negative: Max - *00:00:00.000 PST Mon Jan 1 1900
 Max/Avg TwoWay positive: 140116936/140116944
 Timestamp TwoWay positive: Max - *00:00:00.000 PST Mon Jan 1 1900
 Max/Avg TwoWay negative: 140116936/140116944
 Timestamp TwoWay negative: Max - *00:00:00.000 PST Mon Jan 1 1900
 
   
 
   
 Bucket forward positive:
  Bucket Range: 0-4999 microsecond
   Total observations: 0
  Bucket Range: 5000-9999 microsecond
   Total observations: 0
  Bucket Range: 10000-14999 microsecond
   Total observations: 0
  Bucket Range: 15000-19999 microsecond
   Total observations: 0
  Bucket Range: 20000-24999 microsecond
   Total observations: 0
  Bucket Range: 25000-29999 microsecond
   Total observations: 0
  Bucket Range: 30000-34999 microsecond
   Total observations: 0
  Bucket Range: 35000-39999 microsecond
   Total observations: 0
  Bucket Range: 40000-44999 microsecond
   Total observations: 0
  Bucket Range: 45000--2 microsecond
   Total observations: 0
 
   
 Bucket forward negative:
  Bucket Range: 0-4999 microsecond
   Total observations: 0
  Bucket Range: 5000-9999 microsecond
   Total observations: 0
  Bucket Range: 10000-14999 microsecond
   Total observations: 0
  Bucket Range: 15000-19999 microsecond
   Total observations: 0
  Bucket Range: 20000-24999 microsecond
   Total observations: 0
  Bucket Range: 25000-29999 microsecond
   Total observations: 0
  Bucket Range: 30000-34999 microsecond
   Total observations: 0
  Bucket Range: 35000-39999 microsecond
   Total observations: 0
  Bucket Range: 40000-44999 microsecond
   Total observations: 0
  Bucket Range: 45000--2 microsecond
   Total observations: 0
 
   
 Bucket backward positive:
  Bucket Range: 0-4999 microsecond
   Total observations: 0
  Bucket Range: 5000-9999 microsecond
   Total observations: 0
  Bucket Range: 10000-14999 microsecond
   Total observations: 0
  Bucket Range: 15000-19999 microsecond
   Total observations: 0
  Bucket Range: 20000-24999 microsecond
   Total observations: 0
  Bucket Range: 25000-29999 microsecond
   Total observations: 0
  Bucket Range: 30000-34999 microsecond
   Total observations: 0
  Bucket Range: 35000-39999 microsecond
   Total observations: 0
  Bucket Range: 40000-44999 microsecond
   Total observations: 0
  Bucket Range: 45000--2 microsecond
   Total observations: 0
 
   
 Bucket backward negative:
  Bucket Range: 0-4999 microsecond
   Total observations: 0
  Bucket Range: 5000-9999 microsecond
   Total observations: 0
  Bucket Range: 10000-14999 microsecond
   Total observations: 0
  Bucket Range: 15000-19999 microsecond
   Total observations: 0
  Bucket Range: 20000-24999 microsecond
   Total observations: 0
  Bucket Range: 25000-29999 microsecond
   Total observations: 0
  Bucket Range: 30000-34999 microsecond
   Total observations: 0
  Bucket Range: 35000-39999 microsecond
   Total observations: 0
  Bucket Range: 40000-44999 microsecond
   Total observations: 0
  Bucket Range: 45000--2 microsecond
   Total observations: 0
 
   
 Bucket TwoWay positive:
  Bucket Range: 0-4999 microsecond
   Total observations: 0
  Bucket Range: 5000-9999 microsecond
   Total observations: 0
  Bucket Range: 10000-14999 microsecond
   Total observations: 0
  Bucket Range: 15000-19999 microsecond
   Total observations: 0
  Bucket Range: 20000-24999 microsecond
   Total observations: 0
  Bucket Range: 25000-29999 microsecond
   Total observations: 0
  Bucket Range: 30000-34999 microsecond
   Total observations: 0
  Bucket Range: 35000-39999 microsecond
   Total observations: 0
  Bucket Range: 40000-44999 microsecond
   Total observations: 0
  Bucket Range: 45000--2 microsecond
   Total observations: 0
 
   

To display the same outputs as the latest statistics detail command, use the show ip sla history interval n command. The number displayed is the number of intervals configured.

Output for Loss Measurement:
 
   
Switch# show ip sla history 1 interval-statistics 
Loss Statistics for Y1731 Operation 1
Type of operation: Y1731 Loss Measurement
Latest operation start time: *09:46:16.225 UTC Fri Nov 26 2010
Latest operation return code: OK
Distribution Statistics:
 
   
Interval 1
 Start time:  *09:46:16.225 UTC Fri Nov 26 2010
 End time:  *09:48:16.221 UTC Fri Nov 26 2010
 Number of measurements initiated: 12006
 Number of measurements completed: 12000
 Flag: OK
 
   
Forward
 Number of Observations 11999
 Timestamps forward: 
   Max - *09:47:20.252 UTC Fri Nov 26 2010/   Min - *09:48:16.221 UTC Fri Nov 26 2010
 Tx frame count: 30000
 Rx frame count: 20000
 Available indicators: 11999
 Unavailable indicators: 0
 Max/Avg/Min - (FLR % ): 1:3/2.78%/0:0 
Backward
 Number of Observations 11999
 Timestamps backward: 
   Max - *09:48:16.221 UTC Fri Nov 26 2010/   Min - *09:48:16.221 UTC Fri Nov 26 2010
 Tx frame count: 10000
 Rx frame count: 10000
 Available indicators: 11999
 Unavailable indicators: 0
 Max/Avg/Min - (FLR % ): 0:0/0.0%/0:0 
 
   
Output for Delay Measurement:
 
   
Switch#show ip sla history 10 interval-statistics
Delay Statistics for Y1731 Operation 10
Type of operation: Y1731 Delay Measurement
Latest operation start time: 10:58:30.144 PDT Tue Jan 4 2011
Latest operation return code: Timeout
Distribution Statistics:
 
   
 
   
Interval 1
 Start time:  10:58:30.144 PDT Tue Jan 4 2011
 End time:  10:59:05.140 PDT Tue Jan 4 2011
 Number of measurements initiated: 33
 Number of measurements completed: 34
 Flag: OK
 
   
 
   
Delay:
 Number of TwoWay observations: 34
  Max/Avg/Min TwoWay: 113364/100499/100099 (microsec)
 Time of occurrence TwoWay:
   Max - 10:59:05.140 PDT Tue Jan 4 2011
   Min - 10:58:40.076 PDT Tue Jan 4 2011
 
   
 Bin TwoWay:
        Bin Range (microsec)            Total observations
                 0 - < 5000                     0
              5000 - < 10000                    0
             10000 - < 15000                    0
             15000 - < 20000                    0
             20000 - < 25000                    0
             25000 - < 30000                    0
             30000 - < 35000                    0
             35000 - < 40000                    0
             40000 - < 45000                    0
             45000 - < 4294967295               34
 
   
Delay Variance:
 Number of TwoWay positive observations: 19
  Max/Avg TwoWay positive: 13256/706 (microsec)
 Time of occurrence TwoWay positive:
   Max - 10:59:05.140 PDT Tue Jan 4 2011
 Number of TwoWay negative observations: 14
  Max/Avg TwoWay negative: 86/11 (microsec)
 Time of occurrence TwoWay negative:
   Max - 10:58:40.076 PDT Tue Jan 4 2011
 
   
 Bin TwoWay positive:
        Bin Range (microsec)            Total observations
                 0 - < 5000                     18
              5000 - < 10000                    0
             10000 - < 15000                    1
             15000 - < 20000                    0
             20000 - < 25000                    0
             25000 - < 30000                    0
             30000 - < 35000                    0
             35000 - < 40000                    0
             40000 - < 45000                    0
             45000 - < 4294967295               0
 
   
 Bin TwoWay negative:
        Bin Range (microsec)            Total observations
                 0 - < 5000                     14
              5000 - < 10000                    0
             10000 - < 15000                    0
             15000 - < 20000                    0
             20000 - < 25000                    0
             25000 - < 30000                    0
             30000 - < 35000                    0
             35000 - < 40000                    0
             40000 - < 45000                    0
             45000 - < 4294967295               0

To display the performance monitoring session summary, use the show ethernet cfm pm session summary command.

Switch# show ethernet cfm pm session summary
Number of Configured Session : 1
Number of Active Session: 1
Number of Inactive Session: 0

Troubleshooting

These troubleshooting scenarios apply to the Y.1731 performance monitoring configurations:

Problem
Solution

When the IP SLA sessions do not come up.

Use the debug commands:

debug ethernet cfm pm events [session <session id>]

debug ethernet cfm pm error [session <session id>]

debug ethernet cfm pm diagnostic

debug ethernet cfm pm ipc [session <session id>]

debug ethernet cfm pm packet [session <session id>]