Enabling and Configuring Thresholds on the Optical Inline Amplifier Performance Monitors
Performance monitors monitor the health of the optical inline amplifier (ILA) at various points on the optical ILA hardware based on threshold crossing alerts (TCA)s. TCAs can give the management system an early indication as to the state of the associated entity when it crosses a certain threshold. TCAs are alerts that are activated when a certain configurable threshold—near-end measurement threshold or far-end measurement threshold—is crossed and remains so until the end of the 15-minute interval and the 24-hour interval. The timely detection of TCAs is essential to proactively manage the optical ILA. TCAs are not an indication of a fault, but rather an indication that the entity may be close to a fault. You can enable the TCA that you want monitor. You can keep the default threshold settings or change the settings.This topic describes how to configure TCAs for the optical ILA performance monitors.
By default, TCAs are disabled.
The optical supervisory channel (OSC) must be operational across the amplifier chain to enable and configure TCAs for the performance monitors on the optical ILA. For details on configuring the OSC, see Configuring the Optical Supervisory Channel Across the Amplifier Chain of the PTX3000 Integrated Photonic Line System.
The optical ILA supports the performance monitors listed in Table 1.
Table 1: Optical ILA Performance Monitors
Performance Monitor | 15 Min Bin | 24 Hr Bin | TCA High | TCA Low |
|---|---|---|---|---|
OSC TX power | Yes | Yes | Yes | Yes |
OSC RX power | Yes | Yes | Yes | Yes |
OSC estimated fiber loss | Yes | Yes | No | No |
Line OUT VOA attenuation | Yes | Yes | Yes | Yes |
EDFA Input power (for both EDFAs) | Yes | Yes | Yes | Yes |
EDFA Output power (for both EDFAs) | Yes | Yes | Yes | Yes |
EDFA Signal output power (for both EDFAs) | Yes | Yes | Yes | Yes |
EDFA Pump current (for both EDFAs) | ||||
EDFA Pump temperature (for both EDFAs) | Yes | Yes | Yes | Yes |
Each performance monitor supports:
15-minute and 24-hour binning
Low and high threshold levels as described in Table 2.
You can configure 15-minute and 24-hour performance monitor
TCA thresholds on the optical ILA. When you configure the 15-minute
and 24-hour performance monitor TCA thresholds through the user interface
of the optical ILA, the optical ILA performs checking to ensure that
the threshold values are within valid ranges. Starting with Junos OS Release 17.1R1, the optical ILA supports an inband optical supervisory channel
that enables you to configure these same performance monitor TCA thresholds
through the Junos OS CLI, in addition to the optical ILA user interface.
However, when you configure the optical ILA TCA thresholds through
the Junos OS CLI, no range checking is performed and if the thresholds
are outside of the valid ranges, the configuration is still accepted
by Junos OS and the failure messages are placed in the /var/log/messages directory of the PTX3000 router.
However, the Junos OS CLI displays the previously configured threshold
values when you run the show chassis fpc optical-properties pm-current command from the Junos OS CLI. Range checking is imposed only when
the optical ILA is in Auto mode, which is the default setting.
Table 2: Optical ILA Threshold Crossing Alert Minimum and Maximum Values
TCA | Description | Range Minimum/Maximum |
|---|---|---|
Erbium-Doped Fiber Amplifier (EDFA) Input Power (for Both EDFAs) | ||
edfa-ab-input-power edfa-ba-input-power | EDFA Input power (for both EDFAs) | 12/—38 dBm |
Erbium-Doped Fiber Amplifier (EDFA) Output Power (for Both EDFAs) | ||
edfa-ab-output-power edfa-ba-output-power | EDFA Output power (for both EDFAs) | 21/—13 dBm |
edfa-ab-pump0-temperature edfa-ba-pump0-temperature edfa-ab-pump1-temperature edfa-ba-pump1-temperature | EDFA Pump temperature (for both EDFAs, 2 pumps per direction) | 30/20 Degrees C |
edfa-ab-pump1-current edfa-ba-pump1-current | EDFA Pump current (for both EDFAs, pump1) | 0/790 mA Note: There is no single general fixed value for the EDFA pump current TCA threshold high limit. For a given EDFA in operation, the software and firmware read a programmed value for the EOL Pump current for that specific pump, and raises the appropriate alarms when that value is approached. |
edfa-ab-pump0-current edfa-ba-pump0-current | EDFA Pump current (for both EDFAs, pump0) | 0/1160 mA Note: There is no one general fixed value for the EDFA pump current TCA threshold high limit. For a given EDFA in operation, the software reads a programmed value for the EOL pump current for that specific pump, and raises the appropriate alarms when that value is approached. |
edfa-ab-signal-output-power edfa-ba-signal-output-power | EDFA Signal output power (for both EDFAs) | 21/—13 dBm |
Line OUT Variable Optical Attenuation (VOA) | ||
voa-a-attenuation voa-b-attenuation | Line OUT Variable Optical Attenuation (VOA) | —1/26 dB |
Optical Supervisory Channel (OSC)/FPGA Estimated Fiber Loss | ||
osc-a-estimated-fiber-loss osc-b-estimated-fiber-loss | OSC/FPGA estimated fiber loss | —1/36 dB |
Optical Supervisory Channel (OSC) RX Power | ||
osc-rx-a-power-high-tca osc-rx-b-power-low-tca | OSC RX power | 2/—45 dBm |
Optical Supervisory Channel (OSC) TX Power | ||
osc-a-tx-power-high-tca osc-b-tx-power-low-tca | OSC TX power | 0/6 dBm |
EDFA Input/Output Power Monitors | ||
Power monitor at Input port | Input port power monitor | 12/—38 dBm |
Power monitor at output port | Output port power monitor | 21/—13 dBm |
To configure a TCA, specify the TCA low and high thresholds for the TCA. This example enables the osc-a-tx-power-high-tca and osc-b-tx-power-low-tca TCA in the TX Power performance monitor for optical ILA number 3.
To configure a TCA:
- Navigate to the optical ILA amplifier chain configuration
hierarchy. For example:[edit]user@host# edit chassis fpc 2 optical-options amplifier-chain ila 3 ila-options
- Configure the 15-minute, low threshold. For example:[edit chassis fpc 2 optical-options amplifier-chain ila 3 ila-options]user@host# set osc-b-tx-power-low-tca threshold 2 enable-tca
- Configure the 15-minute, high threshold. For example:[edit chassis fpc 2 optical-options amplifier-chain ila 3 ila-options]user@host# set osc-a-tx-power-high-tca threshold 4 enable-tca
- Configure the 24-hour, low threshold. For example:[edit chassis fpc 2 optical-options amplifier-chain ila 3 ila-options]user@host# set osc-b-tx-power-low-tca threshold-24hrs 1 enable-tca
- Configure the 24-hour, high threshold. For example:[edit chassis fpc 2 optical-options amplifier-chain ila 3 ila-options]user@host# set osc-a-tx-power-high-tca threshold-24hrs 5 enable-tca
- Verify the configuration.[edit chassis fpc 2 optical-options amplifier-chain ila 3 ila-options]user@host# show
osc-a-tx-power-high-tca { enable-tca; threshold 4; threshold-24hrs 5; } osc-b-tx-power-low-tca { enable-tca; threshold 2; threshold-24hrs 1; } - Save your configuration.[edit chassis fpc 2 optical-options tca]user@host# commit
- You can use the following commands to view information about optical ILA performance monitors: