Extreme Networks ExtremeSwitching 5720 Series Hardware Installation Manual page 62

Two-Post Rack Mount
Figure 35: Attaching a Short Mounting Bracket (Ear): Middle of Switch
c. Use four small mounting screws (provided) to attach the bracket to the switch.
2. Attach the other short mounting bracket to the other side of the switch housing, as you did in step 1.
3. Attach a long mounting bracket to one side of the switch housing and to the rack post.
a. Position the long bracket over the holes between the front and the middle of the switch. Orient it
so that its flange (ear) rests against the rack post.
See
Figure 36: Attaching a Long Mounting Bracket: Front of Switch
62 ExtremeSwitching 5720 Series Hardware Installation Guide
Figure 36 and Figure 37.
Install Your Switch