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Overriding the Default Maximum Power (Junos OS Evolved)

 

On the PTX10001-36MR router, you can override the maximum power value of the power supply module (PSM) by specifying a lesser power value. Similarly, on the PTX10008 router, you can override the default power budget allocated to the line card by specifying a power value.

Overriding the Default Maximum Power (PTX10001-36MR)

You can override the maximum power value of a power supply module (PSM), if you need to deploy the PTX10001-36MR router in an environment that does not require the maximum power capacity (3000 W) of the PSM. You can use the command set chassis psm max-power to override the maximum power capacity of the PSM. Using this configuration, you can specify a value that is less than the maximum capacity of the PSM, and then monitor the real-time power consumption against the configured power value.

See the following example to know how to override the default power in PTX10001-36MR:

If the above configuration is set, the system power capacity is shown as 1600W. See the following show chassis power detail output:

user@router# show chassis power detail
Note

If the power consumption of the PTX10001-36MR router exceeds the threshold you configured using the set chassis psm max-power command, the software does not take any corrective action against the breach; and the router might still encounter a power failure.

If the power consumption exceeds the configured threshold, the system raises a chassis alarm, as shown in the following example:

user@router# show system alarms

Overriding the Default Maximum Power (PTX10008)

On the PTX10008 router, during the system startup, the power management software by default takes the maximum power mentioned for each field replaceable unit (FRU) and makes the power calculations based on this number. However, you can override the default power budget allocated to the line card by specifying a power value (in watts). You can use the command set chassis fpc fpc-slot max-power watts to override the default power. You can use the command show chassis fpc detail to view the maximum power consumption by a line card.

You can also disable the power management on PTX10008 by using the command set chassis no-power-budget. If you disable the power management on PTX10008, the system does not move any of the FRUs to offline state in case of insufficient power. Instead, the system keeps all the FRUs powered on by default. However, in case of a power shortage, a power redundancy alarm is raised as shown in the following example.

user@router> show system alarms

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