[j-nsp] All interface suddenly down logically on Junos 8.5R3.4

[amin amin]

Hi All,

I have implemented 5 routers M7i with junos 8.5R.3.4, I so confused why this
router suddenly all interface down logically but the light all PIC are
green,  I don't find  anything alarms  at "show log chassisid and show log
messages " that  show  error.
that routers can be accessed via console , not seems hang.
it 's solved when I rebooted
I have reported to JTAC but still  investigating
Is there any bug on Junos 8.5R3.4?
Do you have any experience about this case

Kindly support your suggestion

Thanks

Amin
Network Engineer
IM: amiensda at yahoo.com