Juniper EX9214 Hardware Manual page 266

CAUTION: The weight of line cards in EX9200 switches is in the range 14–19.4 lb
(6.6–8.8 kg). Be prepared to support the full weight as you slide the line card into
the chassis.
Before you slide the line card into the slot on the switch chassis, ensure the line
card is aligned correctly. Misalignment might cause the pins to bend, making the
line card unusable.
7. Lift the line card, and position it in the chassis with the faceplate facing you and the sides of the line
card aligned with the guides in the line card slot on the switch chassis.
8. Make sure the handles stay in the open position and gently slide the line card fully into the slot
using both hands.
9. Rotate both of the ejector handles inward to seat the line card.
10. Bring the line card online by pressing the corresponding line card control button on the craft
interface or by issuing the following CLI command:
user@switch> request chassis fpc slot slot-number online
NOTE: On EX9204, EX9208, and EX9214 switches, when a line card is brought online, if the
aggregate interface is initialized before the child interface is marked as part of the aggregate
interface, there might be a loss of traffic from the aggregate interface for up to 30 seconds and
the CPU usage of the line card installed on the switch might go up to 100%.
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