Corner case.

The problem can only be seen when there are two MPC11E in chassis and one of the linecards is brought down ungracefully.

please refer to PR1762114.

Interfaces on the remaining linecard will be DOWN.

Following logs may be seen on FPC (and on RE if logging severity is set to any):

Sep 14 10:44:45.068  router fpc4 cmtfpc_platformd_set_fabric_rate_limit: pfe 0 cfg rate 0 thr rate 0 programmed rate 0
Sep 14 10:44:45.166  router fpc4 cmtfpc_platformd_set_fabric_rate_limit: pfe 1 cfg rate 0 thr rate 0 programmed rate 0
Sep 14 10:44:45.271  router fpc4 cmtfpc_platformd_set_fabric_rate_limit: pfe 2 cfg rate 0 thr rate 0 programmed rate 0
Sep 14 10:44:45.563  router fpc4 cmtfpc_platformd_set_fabric_rate_limit: pfe 3 cfg rate 0 thr rate 0 programmed rate 0
...

This issue is fixed in the Junos Releases listed in PR1762114