Hello Mr. Feroz,
Please check alarms by
>show chassis alarms
This will give you the clear picture of alarm.
Most probably you will get alarm as :-
fxp0 : Ethernet Link Down,
This alarm is generated because of you did not connected any system to management interface, don't worry this will not impact your production and this alarm can be ignored by
# set chassis alarms management-Ethernet link-down ignore
For more Reference please check
http://kb.juniper.net/KB19523And feel free to reply if any clarification required
Regards
Sachin Jha
Juniper Ingeneous Champion
JNCIS-SEC, JNCIS - SP, JNCIP - ENT