3
The standard method is to face the flange toward the front of the chassis. However, you can also mount the flange toward the back if you want to mount the switch backward in the chassis
flange
Figure 1-2: Attaching One Rail to Switch Chassis
3.Repeat Step 1. and Step 2. on the opposite side of the switch chassis.
The two counterparts to these sliding rails (without screw holes) should still be unattached.
4.Check your rack for clearance for the switch. The switch can be installed either directly on top of another device (using the rubber feet, which are provided), or be suspended from the rack brackets.