Optics Environment Monitoring (EM) Policy Support
This topic covers benefits of the optics environment monitoring policy support for your device and associated CLI commands for configuration and monitoring.
The Optics Environmental Monitoring (EM) policy ensures efficient thermal management of high-power optical modules such as 100GbE, 400GbE, and 800GbE. Systems with EM policy support have pre-configured temperature thresholds, eliminating manual fan speed configuration for high-power optics. The system can dynamically adjust fan speeds to maintain safe operational temperatures by periodically polling temperature readings from the optical modules. If the fire shutdown threshold temperature is exceeded, the system will automatically shut down the affected optics to prevent hardware damage, requiring manual intervention for reactivation.
Key functionalities include temperature monitoring integration, automatic shutdown procedures, and CLI commands for managing and configuring the EM policy. These capabilities collectively enhance system reliability and performance by preventing overheating and ensuring safe operational conditions for high-power optics.
EM policy is enabled by default on all high-power optics that are Multi-source Agreements (MSA) compliant and support diagnostic EEPROM with temperature monitoring. This policy is not applicable for loopback optics and direct attach copper (DAC) cables.
To manage this feature, you can leverage specific CLI commands for various configurations and monitoring tasks. For example:
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If you need to disable the temperature monitoring on a particular port, you can use the
set chassis fpc fpc_slot pic pic_slot port port_no no-temperature-monitoringcommand. This command allows you to explicitly disable the EM policy on specified ports, which can be particularly useful for testing and troubleshooting. -
To view the temperature thresholds configured for the optics, you can use the
show chassis temperature-thresholdscommand, providing you with the necessary information to understand the predefined limits. For example:user@host> show chassis temperature-thresholds Fan speed Yellow alarm Red alarm Fire Shutdown (degrees C) (degrees C) (degrees C) (degrees C) Item Normal High Normal Bad fan Normal Bad fan Normal Routing Engine 0 65 70 95 95 100 100 110 Routing Engine 1 65 70 95 95 100 100 110 CB 0 Intake A Temp Sensor 30 35 80 80 85 85 95 CB 0 Intake B Temp Sensor 30 35 80 80 85 85 95 CB 0 Exhaust A Temp Sensor 40 45 80 80 85 85 95 CB 0 Exhaust B Temp Sensor 40 45 80 80 85 85 95 CB 0 Middle Temp Sensor 40 45 80 80 85 85 95 CB 1 Intake A Temp Sensor 30 35 80 80 85 85 95 CB 1 Intake B Temp Sensor 30 35 80 80 85 85 95 CB 1 Exhaust A Temp Sensor 40 45 80 80 85 85 95 CB 1 Exhaust B Temp Sensor 40 45 80 80 85 85 95 CB 1 Middle Temp Sensor 40 45 80 80 85 85 95 FPC 0 Intake-A Temp Sensor 35 40 65 62 70 67 73 FPC 0 Intake-B Temp Sensor 30 35 60 57 65 62 68 FPC 0 Exhaust-A Temp Sensor 41 46 71 68 76 73 79 FPC 0 Exhaust-B Temp Sensor 64 69 94 91 99 96 102 FPC 0 Exhaust-C Temp Sensor 71 76 101 98 106 103 109 FPC 0 MEZZ_TMP432_A 44 49 95 92 100 97 110 FPC 0 MEZZ_TMP432_B 39 44 95 92 100 97 110 FPC 0 MEZZ_TMP432_C 29 34 95 92 100 97 110 FPC 0 MAX6581_PEXSW Sensor 69 74 107 104 110 107 113 FPC 0 PMB_CPU 45 50 90 87 95 92 105 ... -
To view the current temperature readings of the optical module, you can use the
show chassis environmentcommand, enabling you to monitor real-time thermal conditions. For example:user@host> show chassis environment Class Item Status Measurement Power PSM 0 OK 29 degrees C / 84 degrees F Temp CB 0 Temp Sensor Intake 1 OK 31 degrees C / 87 degrees F CB 0 Temp Sensor Intake 2 OK 29 degrees C / 84 degrees F CB 0 Temp Sensor Mid OK 31 degrees C / 87 degrees F CB 0 Temp Sensor Exhaust 1 OK 33 degrees C / 91 degrees F CB 0 Temp Sensor Exhaust 2 OK 31 degrees C / 87 degrees F FPC 0 Temp Sensor Exhaust 1 OK 32 degrees C / 89 degrees F FPC 0 Temp Sensor Exhaust 2 OK 32 degrees C / 89 degrees F FPC 0 Temp Sensor Exhaust 3 OK 33 degrees C / 91 degrees F FPC 0 Temp Sensor Intake 1 OK 33 degrees C / 91 degrees F FPC 0 Temp Sensor Intake 2 OK 28 degrees C / 82 degrees F FPC 0 BX0 ASIC Temp Sensor OK 44 degrees C / 111 degrees F FPC 0 BX1 ASIC Temp sensor OK 38 degrees C / 100 degrees F FPC 0 BXX MMBT Temp sensor OK 35 degrees C / 95 degrees F FPC 0 BXX MMPT Temp sensor OK 32 degrees C / 89 degrees F Routing Engine 0 CPU Temperature OK 45 degrees C / 113 degrees F Fan Fan Tray 0 Fan 1 OK 16050 RPM Fan Tray 0 Fan 2 OK 14100 RPM Fan Tray 1 Fan 1 OK 16200 RPM Fan Tray 1 Fan 2 OK 0 RPM Fan Tray 2 Fan 1 OK 16050 RPM Fan Tray 2 Fan 2 OK 14400 RPM -
To view the operational status of the fan and current fan speed measured in RPM, you can use the
show chassis fancommand. -
If an optic shuts down due to exceeding the fire shutdown temperature threshold, a manual reset is possible by using the
request interface optics-resetcommand or performing a soft optics insertion and removal (OIR). This manual recovery process is crucial as the system does not support automatic recovery, emphasizing the need for you to be prepared to handle such scenarios promptly.
Benefits of Optics Environmental Monitoring Policy
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Prevents hardware damage by automatically shutting down optical modules when critical temperature thresholds are exceeded, ensuring the longevity of high-power optics.
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Enhances system reliability by dynamically adjusting cooling mechanisms based on real-time temperature readings from optical modules.
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Maintains optimal operational conditions for high-power optics by ensuring they operate within safe temperature ranges.
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Reduces manual monitoring efforts through automated temperature polling and fan speed adjustments, allowing for more efficient thermal management.
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Provides clear operational guidance for manual recovery of shutdown optics, ensuring users can quickly restore functionality when necessary.
Use Feature Explorer to confirm platform and release support for this feature.