Install mounting ears on the chassis. Install floating nuts and cabinet guide. Install the USG6710F, USG6715F, USG6725F to the 19-inch standard cabinet through the expandable rear mounting ears. Before installing the USG, check the following items: Before unpacking the carton, ensure that the packing carton. Check each product page for other buying options. Find compatible options for Cisco, NETGEAR, Dell, D-Link, and more. Free shipping on many items | Browse your favorite brands | affordable prices. None of the below is meant to come across as me saying "this is the way it HAS to be done". This certainly isn't an exhaustive list. But here are three general types of rack: Inherently unstable. Needs to be bolted to floor and/or anchored to a wall (preferably both).