Customer sees Minor alarm set, FPC 0 Optics supply voltage too high or low, but FPC looks OK with no active alarms.
In this error log there should not be alarms as shown:
Output from the device:
=================
{master}
user@root> show chassis alarms
No alarms currently active
You should see logs like these:
user@root> show log messages | match optic
Feb 7 20:45:07.065 user@root alarmd[20148]: Alarm set: FPC id=1375731816, color=YELLOW, class=CHASSIS, reason=FPC 0 Optics supply voltage too high or low
Feb 7 20:45:07.065 user@root craftd[17933]: Receive FX craftd set alarm message: color: 2 class: 100 object: 104 slot: 0 silent: 0 short_reason=FPC 0 Optics supply voltage too high or low long_reason=FPC 0 Optics supply voltage too high or low id=1375731816 reason=1375731712
Feb 7 20:45:07.065 user@root craftd[17933]: Minor alarm set, FPC 0 Optics supply voltage too high or low
Feb 7 20:45:08.069 user@root alarmd[20148]: Alarm cleared: FPC id=1375731816, color=YELLOW, class=CHASSIS, reason=FPC 0 Optics supply voltage too high or low
Feb 7 20:45:08.069 user@root craftd[17933]: Minor alarm cleared, FPC 0 Optics supply voltage too high or low
FPC not rebooted in a long time.
user@root> show chassis fpc detail Slot 0 information: State Online Total CPU DRAM 32768 MB Total HBM 49152 MB FIPS Capable True Temperature 36 degrees C / 96 degrees F Start time 2024-02-20 10:42:20 UTC Uptime 353 days, 12 hours, 2 minutes, 34 seconds<<<<<<< Max power consumption 1770 Watts Operating Bandwidth 9600 G
Please review if the device is using non-juniper SFPs:
>show chassis hardware detail
FPC 0 REV 40 750-114437 JNP10K-LC9600 CPU REV 06 750-116519 JNP10K-LC9600 PMB PIC 0 BUILTIN BUILTIN MRATE-4xQDD Xcvr 0 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 1 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 2 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 3 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 PIC 1 BUILTIN BUILTIN MRATE-4xQDD Xcvr 0 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 1 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 2 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 3 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 PIC 2 BUILTIN BUILTIN MRATE-4xQDD Xcvr 0 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 1 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 2 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 3 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 PIC 3 BUILTIN BUILTIN MRATE-4xQDD Xcvr 0 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 1 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 2 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 3 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 PIC 4 BUILTIN BUILTIN MRATE-4xQDD Xcvr 0 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 1 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 2 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 3 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 PIC 5 BUILTIN BUILTIN MRATE-4xQDD Xcvr 0 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 1 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 2 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Xcvr 3 XXXX NON-JNPR QSFP56-DD-400GBASE-DR4 Mezz REV 10 711-114174 JNP10K-LC9600-Mezz
This error should be harmless with no impact. The cause of this could be using non-juniper SFPs.
Please try to swap the SFPs using original Juniper ones.
2026-06-07: Corrected KB and published it as public.2025-02-10 : Article Created