This article describes the changes in output for Junos Telemetry after upgrading the device from version `20.3X75-D43.22` to `21.4R3-S5.17`.
Monitoring tool observed missing light-level-rx metric post upgrade the device to release `21.4R3-S5.17` from `20.3X75-D43.22`.
During troubleshooting, we observed the following issues both before and after the upgrade:
Before:
Path prefix: /interfaces/interface[name=\'xe-11/2/3\']/optics/lanediags/
Path suffix: lane[lane_number=\'0\']/lane_laser_receiver_power_dbm
Total becoming: /interfaces/interface[name=\'xe-11/2/3\']/optics/lanediags/lane[lane_number=\'0\']/lane_laser_receiver_power_dbm
After:
Path prefix: /interfaces/interface[name=\'xe-0/0/34\']/optics/lanediags/lane[lane_number=\'0\']/
Path suffix: /lane_laser_receiver_power_dbm (There is an extra leading forward slash here vs Tx power)
Total becoming: /interfaces/interface[name=\'xe-0/0/34\']/optics/lanediags/lane[lane_number=\'0\']//lane_laser_receiver_power_dbm
```
It appears that there are two extra slashes before `lane_laser_receiver_power_dbm` in the affected devices. This discrepancy is causing our monitoring system to no longer produce the metric, as it does not align with monitoring templates.
We have tested in lab.
With Junos version: 21.4R3-S5.17
Test-Server:~$ /volume/shared/share/jtimon/jtimon --config test.conf --print
{Host:10.xxx.xxx.207 Port:6789 User: Password: xx:false Eos:false Cid: Api:{Port:0} Grpc:{Ws:0} Tls:{ClientCrt: ClientKey: Ca: ServerName:} Influx:<nil> Paths:[{Path:/junos/system/linecard/optics Freq:10000 Origin: Gnmi_submode:0 Gnmi_suppress_redundant:0 Gnmi_heartbeat_interval:0}] CStats:{pstats:0 csv_stats:false} Log:{LogFileName: FileHandle:<nil>} Gnmi:<nil> genstate_no_header:false}
gRPC headers from Junos:
accept-encoding: [identity,gzip]
init-response: [response { subscription_id: 2 } path_list { path: "/junos/system/linecard/optics/" sample_frequency: 10000 } ]
content-type: [application/grpc]
2024/08/22 01:23:47 str_value: /interfaces/interface[name='xe-0/0/0']/optics/
2024/08/22 01:23:47 key: optics_type
2024/08/22 01:23:47 uint_value: 8
2024/08/22 01:23:47 key: module_temp
2024/08/22 01:23:47 double_value: %!d(float64=33.5890007019043)
2024/08/22 01:23:47 key: module_temp_high_alarm_threshold
2024/08/22 01:23:47 key: laser_output_power_high_alarm_threshold_dbm
2024/08/22 01:23:47 double_value: %!d(float64=-13.9)
2024/08/22 01:23:47 key: laser_rx_power_high_warning_threshold_dbm
2024/08/22 01:23:47 double_value: %!d(float64=-1)
2024/08/22 01:23:47 key: laser_rx_power_low_warning_threshold_dbm
2024/08/22 01:23:47 double_value: %!d(float64=-9.9)
2024/08/22 01:23:47 bool_value: %!s(bool=false)
2024/08/22 01:23:47 key: module_temp_low_alarm
2024/08/22 01:23:47 key: module_temp_high_warning
2024/08/22 01:23:47 key: module_temp_low_warning
2024/08/22 01:23:47 key: __prefix__
2024/08/22 01:23:47 str_value: /interfaces/interface[name='xe-0/0/0']/optics/lanediags/lane[lane_number='0']/ <<<< One forward slash after lane_number='0']
2024/08/22 01:23:47 key: lane_laser_temperature
2024/08/22 01:23:47 key: lane_laser_output_power_dbm
2024/08/22 01:23:47 default: &{-2.1968265}
2024/08/22 01:23:47 key: /lane_laser_receiver_power_dbm <<< One forward slash before lane_
2024/08/22 01:23:47 default: &{-3.6815052}
2024/08/22 01:23:47 key: lane_laser_bias_current
2024/08/22 01:23:47 double_value: %!d(float64=5.298)
2024/08/22 01:23:47 key: lane_laser_output_power_high_alarm
2024/08/22 01:23:47 key: lane_laser_output_power_low_alarm
2024/08/22 01:23:47 key: lane_laser_output_power_high_warning
2024/08/22 01:23:47 key: lane_laser_output_power_low_warning
2024/08/22 01:23:47 key: lane_laser_receiver_power_high_alarm
2024/08/22 01:23:47 key: lane_laser_receiver_power_low_alarm
2024/08/22 01:23:47 key: lane_laser_receiver_power_high_warning
2024/08/22 01:23:47 key: lane_laser_receiver_power_low_warning
2024/08/22 01:23:47 key: lane_laser_bias_current_high_alarm
2024/08/22 01:23:47 key: lane_laser_bias_current_low_alarm
2024/08/22 01:23:47 key: lane_laser_bias_current_high_warning
2024/08/22 01:23:47 key: lane_laser_bias_current_low_warning
2024/08/22 01:23:47 key: lane_tx_loss_of_signal_alarm
2024/08/22 01:23:47 key: lane_rx_loss_of_signal_alarm
2024/08/22 01:23:47 key: lane_tx_laser_disabled_alarm
Collector Stats (Run time : 5.633176826s)
1 : in-packets
87 : data points (KV pairs)
232 : in-header wirelength (bytes)
3870 : in-payload length (bytes)
3870 : in-payload wirelength (bytes)
774 : throughput (bytes per seconds)
Junos: 20.3X75-D43.22
20.3X
'2024/08/22 01:02:44 key: __prefix__
2024/08/22 01:02:44 str_value: /interfaces/interface[name='xe-0/0/1']/optics/lanediags/ <<<< One forward slash after lanediags
2024/08/22 01:02:44 key: lane[lane_number='0']/lane_number
2024/08/22 01:02:44 uint_value: 0
2024/08/22 01:02:44 key: lane[lane_number='0']/lane_laser_temperature
2024/08/22 01:02:44 double_value: %!d(float64=28.488000869750977)
2024/08/22 01:02:44 key: lane[lane_number='0']/lane_laser_output_power_dbm <<< No forward slash before lane[lane_
2024/08/22 01:02:44 default: &{-2.3210227}
2024/08/22 01:02:44 key: lane[lane_number='0']/lane_laser_receiver_power_dbm
2024/08/22 01:02:44 default: &{-2.829957}
2024/08/22 01:02:44 key: lane[lane_number='0']/lane_laser_bias_current
2024/08/22 01:02:44 double_value: %!d(float64=6.396)'
str_value: /interfaces/interface[name='xe-0/0/0']/optics/lanediags/lane[lane_number='0']/
str_value: /interfaces/interface[name='xe-0/0/1']/optics/lanediags/