QFX10000 line cards are field-replaceable units (FRUs) that can be installed in the line card slots on the front of the chassis. The line cards are hot-insertable and hot-removable: you can remove and replace them without powering off the switch or disrupting switch functions. However, we recommend that you take them offline before removing them.
If you have the optional line-card cable management system, it is not necessary to remove the cable management system before removing the line card.