Users may notice a "misconfig" alarm in the show chassis alarms output after they install an SPC3 card on an MX Series chassis.

This article explains that the alarm may be seen when Unified Services is disabled.

The following misconfig alarm is reported with the reason as " FPC unsupported mode " when an SPC3 card is installed on an MX chassis.

user@Router-re> show chassis alarms
Nov 16 15:22:15
1 alarms currently active
Alarm time               Class  Description
2021-11-16 09:48:26 IST  Major  FPC 2 misconfig

user@Router-re> show chassis fpc detail 
Slot 2 information:
  State                               Offline   
  Reason                              FPC in unsupported mode
  Temperature                      47 degrees C / 116 degrees F
  FIPS Capable                        False 
  FIPS Mode                           False 
  Max power consumption            650 Watts

Perform the following steps:

1. Confirm whether the software and hardware requirement to install an SPC3 card on MX chassis is met by referring to MX-SPC3 Services Card .

2. After confirming the software and hardware requirements, make sure that Unified Services is enabled and that the system has been rebooted.

Note: If Unified Services is not enabled, the SPC3 card will not come online.

user@Router-re> show system unified-services status 

Nov 16 15:25:29
Unified Services : Disabled

A message that "Unified Services mode is turned off" can also be seen in the message log or in the system boot logs.

user@Router-re> show system boot-messages | match Unified 
Nov 16 15:24:46
Unified Services mode is turned off(0)

user@Router-re>show log messages | match Unified
Nov 16 09:48:03.171  Router-re kernel: Unified Services mode is turned off(0)

If Unified Services mode is turned off as indicated above, enable the service and restart the system to make the SPC3 card come online.

user@Router-re> request system enable unified-services      
Nov 16 15:29:30
Before enabling unified services, please move to baseline configuration.
Are above conditions satisfied ? [yes,no] (no) yes 
Nov 16 15:29:32

Verified junos-unified-services signed by PackageProductionECP256_2020 method ECDSA256+SHA256
NOTICE: 'pending' set will be activated at next reboot...
Verified junos-unified-services-x86-32-20200320 signed by PackageProductionECP256_2020 method ECDSA256+SHA256
Unified-Services upgrade staged. Please reboot with 'request system reboot' command to complete the upgrade

user@Router-re> request system reboot