During lab testing of Dynamic Power Management (DPM) on an MX10004 chassis, the customer observed that the line card - JNP10K-LC9600 - failed to power on correctly after enabling the "set chassis mic-aware-power-management" command.
The chassis was rebooted after committing the command, as per the instructions provided in the Juniper documentation.
Post-reboot, the line card appeared to be stuck in a non-functional or "limbo" state.
Hostname: jtac-mx10004-r2003-re0
Model: mx10004
Junos: 23.4R2-S5.6
FPC 0 REV 38 750-114437 XXXXXXXX JNP10K-LC9600
FPC 1 REV 24 750-084779 XXXXXXXX JNP10K-LC2101
#Before applying the "mic-aware-power-management" knob
labroot@jtac-mx10004-r2003-re0> show chassis power detail
...
System:
Zone 0:
Capacity: 11000 W (maximum 11000 W)
Allocated power: 6297 W (4703 W remaining)
Actual usage: 2100 W
Total system capacity: 11000 W (maximum 11000 W)
Total remaining power: 4703 W
Item Used(W) Max(W)
FPC 0 473 1770
Item Used(W)
FPC 1 748
#After applying the "mic-aware-power-management" knob
labroot@jtac-mx10004-r2003-re0# show |compare
[edit]
+ chassis {
+ mic-aware-power-management;
+ }
labroot@jtac-mx10004-r2003-re0> restart chassis-control
Chassis control process started, pid 24062
labroot@jtac-mx10004-r2003-re0> show chassis fpc
Temp CPU Utilization (%) CPU Utilization (%) Memory Utilization (%)
Slot State (C) Total Interrupt 1min 5min 15min DRAM (MB) Heap Buffer
0 Present Testing
1 Online 44 19 0 18 17 10 3168 21 30
Allocated power: 3777 W (7223 W remaining)
Actual usage: 1705 W
Total remaining power: 7223 W
FPC 0 0 0
FPC 1 773
Dynamic Power Management (DPM) is enabled by default on the MX10004 platform starting with Junos OS release 22.3R1. Since the MX10004 chassis supports only fixed line cards, MIC-aware power management is not applicable. Therefore, enabling mic-aware-power-management is unnecessary and may lead to unexpected behavior.
To resolve the issue:
*] Do not enable the mic-aware-power-management command on MX10004.
*] If already enabled, remove the configuration and reboot the chassis to restore normal operation.