This article addresses an issue with FPC line cards. The FPC is stuck in an ‘Offline’ state with reason as FPC misconfiguration.

When checking the FPC line card state using the command show chassis fpc, the FPC state found to be ‘Offline’ with the note ‘FPC misconfiguration’.

> show chassis fpc no-forwarding
Reqd/Curr Configured Current Time Last
FPC State Planes Degrad(%),action Degrad(%) Action Initiated
0 Offline --- FPC misconfiguration ---
1 Empty
2 Empty

The issue can be resolved by configuring the device with the enhanced-ip services and rebooting the system.
 

Follow below steps in maintenance window to resolve the issue:
 

1) Configure enhanced IP services for chassis.

#set chassis network-services enhanced-ip

2) Reboot both routing engines.

>request system reboot both-routing-engines

Please refer below link for more details about enhanced-ip services.

Configuring Network Services Mode: https://www.juniper.net/documentation/us/en/software/junos/chassis/topics/topic-map/chassis-guide-tm-config-ntwrk-srvics-mode.html