Cisco 12416 Installation And Configuration Manual page 129

Chapter 3 Installing the Router
b.
c.
d.
Repeat Step 3 for the left center-mount bracket.
Step 4
Use a level to verify that the tops of the two brackets are level, or use a measuring
Step 5
tape to verify that both brackets are the same distance from the top of the rack
rails.
Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
OL-11495-01
Finger-tighten a second screw in the top hole of the bracket.
Finger-tighten three more screws in the middle of in the bracket.
Use a screwdriver to tighten all five screws securely.
Rack-Mounting the Router Chassis
3-11