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:
user@router#set chassis psm max-power 1600user@router#commit
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
Chassis Power Voltage(V) Power(W)
Total Input Power 937
PSM 0
Input 1 229 391
Output 12.03 305.44
Capacity 1600 W (maximum 3000 W)
PSM 1
Input 1 0 546
Output 12.04 515.08
Capacity 1600 W (maximum 3000 W)
Item Used(W)
Routing Engine 0 25
CB 0 5
System:
Zone 0:
Capacity: 3200 W (maximum 6000 W)
Actual usage: 937 W
Total system capacity: 3200 W (maximum 6000 W)
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 Mar 15 12:51:30 2 alarms currently active Alarm time Class Description 2020-03-15 12:50:52 UTC Minor Power consumption is critical
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 1 alarm currently active Alarm time Class Description 2019-07-25 21:16:25 UTC Major chassis No Redundant Powe