On a QFX3000-G or M QFabric system, if you execute "show interfaces queue <interface-name > source-chassis <> " or "show interfaces queue <interface-name > source-chassis <> " command on a Network Node group CLI, FPC may detach from the Network Node Group and interfaces may flap. Below is the example of commands. show interfaces queue xe-1/0/40 source-chassis 1 show interfaces queue xe-1/0/42 source-fpc 1 These commands are only available in Network Node Group CLI ( NW-NG-0). User can only go to Network Node CLI from Qfabirc CLI by executing "request component login NW-NG-0" . Network Node CLI is meant for troubleshooting purposes for Juniper Support and users are recommended to use Qfabric CLI.