When allocating equipment rack space, consider the following:
Type of equipment racks recommended for ERX routers
Number of equipment racks required to hold your current
router configuration
Future expansion
Make sure your distribution rack meet basic mechanical and space
requirements and complies with conventional standards. In the United
States, use EIA-310-D Cabinets, Racks, Panels, and Associated Equipment,
September 1992.
Figure 52: ERX Routers Installed in a
Rack
Mechanical Requirements
Follow these mechanical requirements for your rack:
Select from the following rack options:
Two-post rack—A freestanding enclosed cabinet with
two mounting posts in the front
Telco-type rack—Two adjacent mounting posts that
you must secure to the floor or an overhead structure
Four-post rack—A freestanding open rack, either
open or closed
The rack must have at least two mounting posts.
The distance between the mounting holes in the two posts
must be 18.31 inches ±.063 inch, as specified in the EIA-310-D.
Do not use an enclosed rack for ERX-7xx models or the
ERX-310 router. It does not provide adequate ventilation.
A fully loaded rack with three ERX-14xx models must structurally
support 300 pounds (136 kilograms).
Optional mounting kits are available for 19-inch and 23-inch
rack mounting (mid-chassis and front-chassis mounting). Contact your
Juniper Networks sales representative for more information.
Space Requirements
If you use an enclosed rack for an ERX-14xx model, ensure that
there is a minimum of 3 inches of clearance between the inner side
wall and the router. This clearance space ensures adequate air flow.
Proper Rack Installation
To confirm proper equipment rack installation, verify the following:
Racks are installed and electrically
grounded according to manufacturer instructions.
Equipment racks are anchored to
the floor and, when possible, anchored to the ceiling as well.
Equipment rack installations comply
with applicable local, state, and national codes.
Caution:
To maintain airflow requirements, a plenum must be installed
above ERX-14xx models before any other piece of equipment is installed
above the router.
