Transceiver Performance Monitoring
Transceiver Performance Monitoring Overview
The Transceiver Performance Monitoring and Enhanced Diagnostics enables viewing the Digital Optical Monitoring (DOM) parameters for the optics that support enhanced diagnostics. Use the show commands to view the instantaneous values for various PAM4 parameters such as Signal-To-Noise Ratio, Residual Inter Symbol Interference, PAM4 Level Transition Parameters, and other parameters supported on optics interfaces.
Using the Performance Monitoring feature allows eos to collect and maintain certain performance statistics over a user-defined time. eos stores data for two intervals: the current interval and the most recently completed interval. When the current interval ends, the data is saved as the previous interval so a new current interval can start, and the old previous interval data discarded.
Configuring Transceiver Performance Monitoring
eos enables the Digital Optical Monitoring (DOM) on all interfaces and you cannot disable the feature.
switch(config)#performance-monitoring transceiver defaultswitch(config)#interface ethernet8/1
switch(config-if-Et8/1)#performance-monitoring transceiverswitch(config)#performance-monitoring period 60sThecommand configures the performance monitoring period to 60 seconds across the system. This command supports configuring the performance monitoring period in units of either seconds, minutes, hours or days. For example, use performance-monitoring period 30 minutes to configure the period as 30 minutes, performance-monitoring period 2 hours to configure the period as 2 hours and so on. The default performance-monitoring period is 15 minutes.
Use the no form of these commands to revert the configuration.
100GBASE-FR, 100GBASE-LR and 100GBASE-DR do not have thresholds for enhanced Digital Optical Monitoring (DOM) parameters, so these parameters and their thresholds do not display in the output of show interfaces transceiver dom thresholds command.
switch# show interfaces ethernet8/1 transceiver dom thresholds
Ch: Channel, mA: milliamperes, dBm: decibels (milliwatts),
C: Celsius, V: Volts, NA or N/A: not applicable.
ethernet8/1
Last update: 0:00:02 ago
High Alarm High Warn Low Warn Low Alarm
Parameter Ch Value Threshold Threshold Threshold Threshold Unit Indicator
-------------------------------------------------------------------------------------------------
Temperature - 58.87 72.00 65.00 5.00 -2.00 C
Voltage - 3.28 3.56 3.47 3.14 3.04 V
TX bias current 1 83.90 131.00 120.00 35.00 30.00 mA
2 85.30 131.00 120.00 35.00 30.00 mA
Optical TX power 1 -10.51 -6.99 -8.00 -11.00 -12.00 dBm
2 -9.70 -6.99 -8.00 -11.00 -12.00 dBm
Optical RX power 1 -0.99 6.99 6.02 -2.00 -3.01 dBmTransceiver Performance Monitoring
100GBASE-FR, 100GBASE-LR and 100GBASE-DR do not have thresholds of enhanced Digital Optical Monitoring (DOM) parameters, so these parameters and thresholds do not display in the output of CLI command show interfaces transceiver dom thresholds.
switch# show interfaces ethernet8/1 transceiver dom thresholds
Ch: Channel, mA: milliamperes, dBm: decibels (milliwatts),
C: Celsius, V: Volts, NA or N/A: not applicable.
ethernet8/1
Last update: 0:00:02 ago
High Alarm High Warn Low Warn Low Alarm
Parameter Ch Value Threshold Threshold Threshold Threshold Unit Indicator
-------------------------------------------------------------------------------------------------
Temperature - 58.87 72.00 65.00 5.00 -2.00 C
Voltage - 3.28 3.56 3.47 3.14 3.04 V
TX bias current 1 83.90 131.00 120.00 35.00 30.00 mA
2 85.30 131.00 120.00 35.00 30.00 mA
Optical TX power 1 -10.51 -6.99 -8.00 -11.00 -12.00 dBm
2 -9.70 -6.99 -8.00 -11.00 -12.00 dBm
Optical RX power 1 -0.99 6.99 6.02 -2.00 -3.01 dBmDisplayingTransceiver Performance Monitoring
Use the show interfaces transceiver dom command to display the Digital Optical Monitoring (DOM) parameters. The displayed parameters are the most recently read, instantaneous values.
switch#show interfaces ethernet8/1 transceiver dom
Ch: Channel, N/A: not applicable, TX: transmit, RX: receive
mA: milliamperes, dBm: decibels (milliwatts), C: Celsius, V: Volts
ethernet8/1
Last update: 0:00:03 ago
Parameter Ch Value Unit
-------------------------------------------
Temperature - 58.97 C
Voltage - 3.28 V
TX bias current 1 83.61 mA
2 85.15 mA
Optical TX power 1 -10.60 dBm
2 -9.79 dBm
Optical RX power 1 -0.84 dBm
2 -2.28 dBm
SNR 1 17.46 dB
2 15.89 dB
Residual ISI 1 0.00 ps/nm
2 0.00 ps/nm
Level transitions 1 829.00
2 3055.00
TEC current error 1 -527.60 mA
2 -365.70 mA
Frequency error 1 -0.48 GHz
2 0.00 GHz
Pre-FEC BER - 1.53e-03
Uncorrected BER - 0.00e+00Use the show interfaces transceiver dom thresholds command to display the Digital Optical Monitoring (DOM) parameters and thresholds. The displayed parameters are the most recently read, instantaneous values.
switch#show interfaces ethernet8/1 transceiver dom thresholds
Ch: Channel, mA: milliamperes, dBm: decibels (milliwatts),
C: Celsius, V: Volts, NA or N/A: not applicable.
ethernet8/1
Last update: 0:00:02 ago
High Alarm High Warn Low Warn Low Alarm
Parameter Ch Value Threshold Threshold Threshold Threshold Unit Indicator
-------------------------------------------------------------------------------------------------
Temperature - 58.87 72.00 65.00 5.00 -2.00 C
Voltage - 3.28 3.56 3.47 3.14 3.04 V
TX bias current 1 83.90 131.00 120.00 35.00 30.00 mA
2 85.30 131.00 120.00 35.00 30.00 mA
Optical TX power 1 -10.51 -6.99 -8.00 -11.00 -12.00 dBm
2 -9.70 -6.99 -8.00 -11.00 -12.00 dBm
Optical RX power 1 -0.99 6.99 6.02 -2.00 -3.01 dBm
2 -2.45 6.99 6.02 -2.00 -3.01 dBm WARN
SNR 1 17.46 40.00 39.00 19.00 18.00 dB ALARM
2 15.89 40.00 39.00 19.00 18.00 dB ALARM
Residual ISI 1 0.00 409.60 128.00 -128.00 -409.60 ps/nm
2 0.00 409.60 128.00 -128.00 -409.60 ps/nm
Level transitions 1 812.00 57344.00 53248.00 0.00 0.00
2 3249.00 57344.00 53248.00 0.00 0.00
TEC current error 1 -504.70 409.60 128.00 -128.00 -409.60 mA ALARM
2 -329.50 409.60 128.00 -128.00 -409.60 mA WARN
Frequency error 1 -0.42 5.12 2.56 -2.56 -5.12 GHz
2 -0.06 5.12 2.56 -2.56 -5.12 GHz
Pre-FEC BER - 1.47e-03 1.00e-04 1.00e-05 N/A N/A ALARM
Uncorrected BER - 0.00e+00 0.00e+00 0.00e+00 N/A N/AThe Indicator column in the output above gives an indication of where the value lies with respect to its thresholds. Nothing is shown when the parameter is in the expected range between the Low Warn and High Warn thresholds. If the value is greater than or equal to the High Alarm or less than or equal to the Low Alarm, ALARM is shown. If the value is greater than or equal to the High Warn (but less than the High Alarm) or less than or equal to the Low Warn (but greater than the Low Alarm), WARN is shown.
The show interfaces transceiver performance-monitoring command is used to display the performance monitoring statistics from the CLI. This command will display data only if the feature has been enabled using the configuration command performance-monitoring transceiver as described in the configuration section.
switch#show interfaces ethernet8/1 transceiver performance-monitoring
Ch: Channel, N/A: not applicable
Performance monitoring period : 0:15:00
ethernet8/1
Parameter Ch Value
-------------------------------------------------------------
Current Interval 0
Started - 0:00:12 ago
Last update - 0:00:02 ago
Pre-FEC BER avg - 1.41e-03
Pre-FEC BER high alarm exceeded - 0
Pre-FEC BER high warn exceeded - 0
Pre-FEC BER max - 1.54e-03
Pre-FEC BER min - 5.93e-06
Temperature alarm exceeded - 0
Temperature warn exceeded - 0
Uncorrected BER avg - 0.00e+00
Uncorrected BER high alarm exceeded - 0
Uncorrected BER high warn exceeded - 0
Uncorrected BER max - 0.00e+00
Uncorrected BER min - 0.00e+00
Interval 1
Started - 0:15:13 ago
Last update - 0:00:12 ago
Pre-FEC BER avg - 1.53e-03
Pre-FEC BER high alarm exceeded - 0
Pre-FEC BER high warn exceeded - 0
Pre-FEC BER max - 1.74e-03
Pre-FEC BER min - 3.11e-05
Temperature alarm exceeded - 0
Temperature warn exceeded - 0
Uncorrected BER avg - 0.00e+00
Uncorrected BER high alarm exceeded - 0
Uncorrected BER high warn exceeded - 0
Uncorrected BER max - 0.00e+00
Uncorrected BER min - 0.00e+00Performance Monitoring Period: 0:15:00
This indicates the length of one Performance Monitoring period. 0:15:00 specifies a period of 15 minutes, which is the default value for this parameter. The Performance Monitoring period can be configured using the performance-monitoring period configuration command as described in the configuration section.
Started: 0:00:12 ago
Indicates the time the host started the performance monitoring interval.
Last Update: 0:00:02 ago
Indicates the last time the host read the diagnostic parameters from the module. The host samples values every six seconds.
Pre-FEC BER avg, Uncorrected BER avg
The average value so far in the indicated performance monitoring interval.
Pre-FEC BER min, Uncorrected BER min
The minimum value so far in the indicated performance monitoring interval.
Pre-FEC BER max, Uncorrected BER max
The maximum value so far in the indicated performance monitoring interval.
Pre-FEC BER high warn exceeded, Uncorrected BER high warn exceeded, Pre-FEC BER high alarm exceeded, Uncorrected BER high alarm exceeded
The number of times the host read a value which was greater than the indicated threshold. The host reads values and checks exceeded thresholds every six seconds. This provides only an indication of the actual exceeded count.
Temperature warn exceeded, Temperature alarm exceeded
The number of times the host read a value which was outside the range of the indicated threshold. The host reads values and checks exceeded thresholds every six seconds. Please note that this provides only an indication of the actual exceeded count.
The show interfaces transceiver performance-monitoring thresholds command displays the performance monitoring statistics and their thresholds from the CLI. This command only displays data only if the feature has been enabled using the configuration command performance-monitoring transceiver.
switch# show interfaces ethernet8/1 transceiver performance-monitoring thresholds
Ch: Channel, N/A: not applicable
Performance monitoring period : 0:00:30
ethernet8/1
High Alarm High Warn Low Warn Low Alarm
Parameter Ch Value Threshold Threshold Threshold Threshold Indicator
--------------------------------------------------------------------------------------------------------------------
Current Interval 0
Started - 0:00:26 ago
Last update - 0:00:03 ago
Pre-FEC BER avg - 1.41e-03 1.00e-04 1.00e-05 N/A N/A ALARM
Pre-FEC BER high alarm exceeded - 0 N/A N/A N/A N/A
Pre-FEC BER high warn exceeded - 0 N/A N/A N/A N/A
Pre-FEC BER max - 1.55e-03 1.00e-04 1.00e-05 N/A N/A ALARM
Pre-FEC BER min - 5.93e-06 1.00e-04 1.00e-05 N/A N/A
Temperature alarm exceeded - 0 N/A N/A N/A N/A
Temperature warn exceeded - 0 N/A N/A N/A N/A
Uncorrected BER avg - 0.00e+00 0.00e+00 0.00e+00 N/A N/A
Uncorrected BER high alarm exceeded - 0 N/A N/A N/A N/A
Uncorrected BER high warn exceeded - 0 N/A N/A N/A N/A
Uncorrected BER max - 0.00e+00 0.00e+00 0.00e+00 N/A N/A
Uncorrected BER min - 0.00e+00 0.00e+00 0.00e+00 N/A N/A
Interval 1
Started - 0:00:57 ago
Last update - 0:00:26 ago
Pre-FEC BER avg - 1.53e-03 1.00e-04 1.00e-05 N/A N/A ALARM
Pre-FEC BER high alarm exceeded - 0 N/A N/A N/A N/A
Pre-FEC BER high warn exceeded - 0 N/A N/A N/A N/A
Pre-FEC BER max - 1.74e-03 1.00e-04 1.00e-05 N/A N/A ALARM
Pre-FEC BER min - 3.11e-05 1.00e-04 1.00e-05 N/A N/A WARN
Temperature alarm exceeded - 0 N/A N/A N/A N/A
Temperature warn exceeded - 0 N/A N/A N/A N/A
Uncorrected BER avg - 0.00e+00 0.00e+00 0.00e+00 N/A N/A
Uncorrected BER high alarm exceeded - 0 N/A N/A N/A N/A
Uncorrected BER high warn exceeded - 0 N/A N/A N/A N/A
Uncorrected BER max - 0.00e+00 0.00e+00 0.00e+00 N/A N/A
Uncorrected BER min - 0.00e+00 0.00e+00 0.00e+00 N/A N/ATransceiver Performance Monitoring commands
Global configuration commands
Interface configuration Command
Show commands
performance-monitoring period
The performance-monitoring period command configures Performance Monitoring Period across the system.
The no performance-monitoring period command removes the Performance Monitoring Period configuration from the running-config.
Command Mode
Global configuration Mode
Command Syntax
performance-monitoring period period
no performance-monitoring period period
Parameter
period performance monitoring period in units of either seconds, minutes, hours or days. The default performance-monitoring period is 15 minutes.
Example
switch(config)# performance-monitoring period 60sperformance-monitoring transceiver
The performance-monitoring transceiver command enable Performance Monitoring on per interface basis.
The no performance-monitoring transceiver command removes the Performance Monitoring configuration from the running-config.
Command Mode
Interface configuration Mode
Command Syntax
performance-monitoring transceiver
no performance-monitoring transceiver
Example
switch(config)#interface ethernet8/1
switch(config-if-Et8/1)#performance-monitoring transceiverperformance-monitoring transceiver default
The performance-monitoring transceiver default command enable Performance Monitoring on all interfaces across the system.
The no performance-monitoring transceiver default command removes the Performance Monitoring configuration from the running-config.
Command Mode
Global configuration Mode
Command Syntax
performance-monitoring transceiver default
no performance-monitoring transceiver default
Example
switch(config)# performance-monitoring transceiver defaultshow interfaces transceiver dom
The show interfaces transceiver dom command displays the Digital Optical Monitoring (DOM) parameters from the CLI. The displayed parameters are the most recently read, ‘instantaneous’ values.
Command Mode
Privileged EXEC
Command Syntax
show interfaces interface transceiver dom
Parameter
interface ethernet interface name.
Example
switch#show interfaces ethernet8/1 transceiver dom
Ch: Channel, N/A: not applicable, TX: transmit, RX: receive
mA: milliamperes, dBm: decibels (milliwatts), C: Celsius, V: Volts
ethernet8/1
Last update: 0:00:03 ago
Parameter Ch Value Unit
-------------------------------------------
Temperature - 58.97 C
Voltage - 3.28 V
TX bias current 1 83.61 mA
2 85.15 mA
Optical TX power 1 -10.60 dBm
2 -9.79 dBm
Optical RX power 1 -0.84 dBm
2 -2.28 dBm
SNR 1 17.46 dB
2 15.89 dB
Residual ISI 1 0.00 ps/nm
2 0.00 ps/nm
Level transitions 1 829.00
2 3055.00
TEC current error 1 -527.60 mA
2 -365.70 mA
Frequency error 1 -0.48 GHz
2 0.00 GHz
Pre-FEC BER - 1.53e-03
Uncorrected BER - 0.00e+00show interfaces transceiver dom thresholds
The show interfaces transceiver dom thresholds command displays the Digital Optical Monitoring (DOM) parameters andthresholds.
Command Mode
Privileged EXEC
Command Syntax
show interfaces interface transceiver dom thresholds
Parameter
interface ethernet interface name.
Example
switch#show interfaces ethernet8/1 transceiver dom thresholds
Ch: Channel, mA: milliamperes, dBm: decibels (milliwatts),
C: Celsius, V: Volts, NA or N/A: not applicable.
ethernet8/1
Last update: 0:00:02 ago
High Alarm High Warn Low Warn Low Alarm
Parameter Ch Value Threshold Threshold Threshold Threshold Unit Indicator
-------------------------------------------------------------------------------------------------
Temperature - 58.87 72.00 65.00 5.00 -2.00 C
Voltage - 3.28 3.56 3.47 3.14 3.04 V
TX bias current 1 83.90 131.00 120.00 35.00 30.00 mA
2 85.30 131.00 120.00 35.00 30.00 mA
Optical TX power 1 -10.51 -6.99 -8.00 -11.00 -12.00 dBm
2 -9.70 -6.99 -8.00 -11.00 -12.00 dBm
Optical RX power 1 -0.99 6.99 6.02 -2.00 -3.01 dBm
2 -2.45 6.99 6.02 -2.00 -3.01 dBm WARN
SNR 1 17.46 40.00 39.00 19.00 18.00 dB ALARM
2 15.89 40.00 39.00 19.00 18.00 dB ALARM
Residual ISI 1 0.00 409.60 128.00 -128.00 -409.60 ps/nm
2 0.00 409.60 128.00 -128.00 -409.60 ps/nm
Level transitions 1 812.00 57344.00 53248.00 0.00 0.00
2 3249.00 57344.00 53248.00 0.00 0.00
TEC current error 1 -504.70 409.60 128.00 -128.00 -409.60 mA ALARM
2 -329.50 409.60 128.00 -128.00 -409.60 mA WARN
Frequency error 1 -0.42 5.12 2.56 -2.56 -5.12 GHz
2 -0.06 5.12 2.56 -2.56 -5.12 GHz
Pre-FEC BER - 1.47e-03 1.00e-04 1.00e-05 N/A N/A ALARM
Uncorrected BER - 0.00e+00 0.00e+00 0.00e+00 N/A N/ACommand Output
The Indicator column in the output above gives an indication of where the value lies with respect to its thresholds. Nothing is shown when the parameter is in the expected range between the Low Warn and High Warn thresholds. If the value is greater than or equal to the High Alarm or less than or equal to the Low Alarm, ALARM is shown. If the value is greater than or equal to the High Warn (but less than the High Alarm) or less than or equal to the Low Warn (but greater than the Low Alarm), WARN is shown.
show interfaces transceiver performance-monitoring
The show interfaces transceiver performance-monitoring command displays the performance monitoring statistics from the CLI. This command will display data only if the Performance Monitoring has been enabled using the configuration command performance-monitoring transceiver.
Command Mode
Privileged EXEC
Command Syntax
show interfaces interface transceiver performance-monitoring
Parameter
INTERFACE ethernet interface name.
Example
switch# show interfaces ethernet8/1 transceiver performance-monitoring
Ch: Channel, N/A: not applicable
Performance monitoring period : 0:15:00
ethernet8/1
Parameter Ch Value
-------------------------------------------------------------
Current Interval 0
Started - 0:00:12 ago
Last update - 0:00:02 ago
Pre-FEC BER avg - 1.41e-03
Pre-FEC BER high alarm exceeded - 0
Pre-FEC BER high warn exceeded - 0
Pre-FEC BER max - 1.54e-03
Pre-FEC BER min - 5.93e-06
Temperature alarm exceeded - 0
Temperature warn exceeded - 0
Uncorrected BER avg - 0.00e+00
Uncorrected BER high alarm exceeded - 0
Uncorrected BER high warn exceeded - 0
Uncorrected BER max - 0.00e+00
Uncorrected BER min - 0.00e+00
Interval 1
Started - 0:15:13 ago
Last update - 0:00:12 ago
Pre-FEC BER avg - 1.53e-03
Pre-FEC BER high alarm exceeded - 0
Pre-FEC BER high warn exceeded - 0
Pre-FEC BER max - 1.74e-03
Pre-FEC BER min - 3.11e-05
Temperature alarm exceeded - 0
Temperature warn exceeded - 0
Uncorrected BER avg - 0.00e+00
Uncorrected BER high alarm exceeded - 0
Uncorrected BER high warn exceeded - 0
Uncorrected BER max - 0.00e+00
Uncorrected BER min - 0.00e+00
Command Output
Performance Monitoring Period: 0:15:00
This indicates the length of one Performance Monitoring period. 0:15:00 specifies a period of 15 minutes, which is the default value for this parameter. The Performance Monitoring period can be configured using the performance-monitoring period configuration command as described in the configuration section.
Started: 0:00:12 ago
This indicates the time the host started the performance monitoring interval.
Last Update: 0:00:02 ago
This indicates the last time the host read the diagnostic parameters from the module. The host samples values every six seconds.
Pre-FEC BER avg, Uncorrected BER avg
This is the average value so far in the indicated performance monitoring interval.
Pre-FEC BER min, Uncorrected BER min
This is the minimum value so far in the indicated performance monitoring interval.
Pre-FEC BER max, Uncorrected BER max
This is the maximum value so far in the indicated performance monitoring interval.
Pre-FEC BER high warn exceeded, Uncorrected BER high warn exceeded, Pre-FEC BER high alarm exceeded, Uncorrected BER high alarm exceeded
This is the number of times the host read a value which was greater than the indicated threshold. The host reads values and checks exceeded thresholds every 6 seconds. Please note that this provides only an indication of the actual exceeded count.
Temperature warn exceeded, Temperature alarm exceeded
This is the number of times the host read a value which was outside the range of the indicated threshold. The host reads values and checks exceeded thresholds every six seconds. Note that this provides only an indication of the actual exceeded count.
show interfaces transceiver performance-monitoring thresholds
The show interfaces transceiver performance-monitoring thresholds command displays the performance monitoring statistics and their thresholds from the CLI.
Command Mode
Privileged EXEC
Command Syntax
show interfaces INTERFACE transceiver performance-monitoring thresholds
Parameter
INTERFACE ethernet interface name.
Example
switch# show interfaces ethernet8/1 transceiver performance-monitoring thresholds
Ch: Channel, N/A: not applicable
Performance monitoring period : 0:00:30
ethernet8/1
High Alarm High Warn Low Warn Low Alarm
Parameter Ch Value Threshold Threshold Threshold Threshold Indicator
--------------------------------------------------------------------------------------------------------------------
Current Interval 0
Started - 0:00:26 ago
Last update - 0:00:03 ago
Pre-FEC BER avg - 1.41e-03 1.00e-04 1.00e-05 N/A N/A ALARM
Pre-FEC BER high alarm exceeded - 0 N/A N/A N/A N/A
Pre-FEC BER high warn exceeded - 0 N/A N/A N/A N/A
Pre-FEC BER max - 1.55e-03 1.00e-04 1.00e-05 N/A N/A ALARM
Pre-FEC BER min - 5.93e-06 1.00e-04 1.00e-05 N/A N/A
Temperature alarm exceeded - 0 N/A N/A N/A N/A
Temperature warn exceeded - 0 N/A N/A N/A N/A
Uncorrected BER avg - 0.00e+00 0.00e+00 0.00e+00 N/A N/A
Uncorrected BER high alarm exceeded - 0 N/A N/A N/A N/A
Uncorrected BER high warn exceeded - 0 N/A N/A N/A N/A
Uncorrected BER max - 0.00e+00 0.00e+00 0.00e+00 N/A N/A
Uncorrected BER min - 0.00e+00 0.00e+00 0.00e+00 N/A N/A
Interval 1
Started - 0:00:57 ago
Last update - 0:00:26 ago
Pre-FEC BER avg - 1.53e-03 1.00e-04 1.00e-05 N/A N/A ALARM
Pre-FEC BER high alarm exceeded - 0 N/A N/A N/A N/A
Pre-FEC BER high warn exceeded - 0 N/A N/A N/A N/A
Pre-FEC BER max - 1.74e-03 1.00e-04 1.00e-05 N/A N/A ALARM
Pre-FEC BER min - 3.11e-05 1.00e-04 1.00e-05 N/A N/A WARN
Temperature alarm exceeded - 0 N/A N/A N/A N/A
Temperature warn exceeded - 0 N/A N/A N/A N/A
Uncorrected BER avg - 0.00e+00 0.00e+00 0.00e+00 N/A N/A
Uncorrected BER high alarm exceeded - 0 N/A N/A N/A N/A
Uncorrected BER high warn exceeded - 0 N/A N/A N/A N/A
Uncorrected BER max - 0.00e+00 0.00e+00 0.00e+00 N/A N/A
Uncorrected BER min - 0.00e+00 0.00e+00 0.00e+00 N/A N/A