Guest

Preview Tool

Cisco Bug: CSCvt16172 - Wrong values for transceivers (DOM) in C9500-24Y4C and C9500-48Y4C

Last Modified

Oct 01, 2020

Products (1)

  • Cisco IOS

Known Affected Releases

16.9.4

Description (partial)

Symptom:
C9500-s#show interfaces transceiver detail 
mA: milliamperes, dBm: decibels (milliwatts), NA or N/A: not applicable.
++ : high alarm, +  : high warning, -  : low warning, -- : low alarm.
A2D readouts (if they differ), are reported in parentheses.
The threshold values are calibrated.

             Optical            High Alarm  High Warn  Low Warn   Low Alarm
             Transmit Power     Threshold   Threshold  Threshold  Threshold
Port         (dBm)              (dBm)       (dBm)      (dBm)      (dBm)
---------    -----------------  ----------  ---------  ---------  ---------
Hu1/0/27      1.6                    5.5        4.5       -4.3       -7.3

             Optical            High Alarm  High Warn  Low Warn   Low Alarm
             Receive Power      Threshold   Threshold  Threshold  Threshold
Port         (dBm)              (dBm)       (dBm)      (dBm)      (dBm)
---------    -----------------  ----------  ---------  ---------  ---------
Hu1/0/27     -6.1                    5.5        4.5      -10.6      -13.6

GCWMPLS9500-s#

entPhysicalDescr
.1.3.6.1.2.1.47.1.1.1.1.2.1250 = STRING: "Hu1/0/27 Transmit Power Sensor"
.1.3.6.1.2.1.47.1.1.1.1.2.1251 = STRING: "Hu1/0/27 Receive Power Sensor"

entSensorType
14:dBm
.1.3.6.1.4.1.9.9.91.1.1.1.1.1.1250 = INTEGER: 14
.1.3.6.1.4.1.9.9.91.1.1.1.1.1.1251 = INTEGER: 14

entSensorScale
9:units
.1.3.6.1.4.1.9.9.91.1.1.1.1.2.1250 = INTEGER: 9
.1.3.6.1.4.1.9.9.91.1.1.1.1.2.1251 = INTEGER: 9

entSensorPrecision
.1.3.6.1.4.1.9.9.91.1.1.1.1.3.1250 = INTEGER: 1
.1.3.6.1.4.1.9.9.91.1.1.1.1.3.1251 = INTEGER: 1

entSensorValue
.1.3.6.1.4.1.9.9.91.1.1.1.1.4.1250 = INTEGER: 1 =====> this should be 16
.1.3.6.1.4.1.9.9.91.1.1.1.1.4.1251 = INTEGER: -6 ====> this should be -61

entSensorStatus
1:ok
.1.3.6.1.4.1.9.9.91.1.1.1.1.5.1250 = INTEGER: 1
.1.3.6.1.4.1.9.9.91.1.1.1.1.5.1251 = INTEGER: 1

We have a total of 7 C9500-24Y4C all running version 16.9.4 and with the same issue of not sending the correct OID value for transmit and receive power.  But the other 9500-40X,  9500-16X with version 16.9.4 send the OID value correctly. Also C9500-48Y4C with multiple different PIDs of SFP are affected as well.

Conditions:
C9500-24Y4C and C9500-48Y4C with multiple different PIDs of SFP.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.