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MX2020 Rack Requirements

Rack Size and Strength

The MX2020 router is designed for installation in a rack that complies with either the following standards:

  • A 19-in. rack as defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronics Components Industry Association (http://www.ecianow.org/).

  • A 600-mm rack as defined in the four-part Equipment Engineering (EE); European telecommunications standard for equipment practice (document numbers ETS 300 119-1 through 119-4) published by the European Telecommunications Standards Institute (ETSI). The horizontal spacing between the rails in a rack that complies with this standard is usually wider than the mounting brackets, which measure 19.2 in. (48.8 cm) from the outer edge to outer edge. Use approved wing devices to narrow the opening between the rails as required.

  • A 23-in. rack using appropriate 23-in. to 19-in. rack adapters and an appropriate installation shelf which supports the chassis at the correct vertical position to properly line up the rack mount holes. Juniper Networks does not supply this hardware, but consideration for the size and weight of the chassis is important for a safe installation.

The rack rails must be spaced widely enough to accommodate the chassis’s external dimensions: 78.75 in. (200 cm) high, 36.20 in. (91.95 cm) deep, and 19 in. (48.3 cm) wide. The outer edges of the front-mounting flanges extend the width to 19.2 in. (48.8 cm), The spacing of rails and adjacent racks must also allow for the clearances around the chassis and rack that are specified in Clearance Requirements for Airflow and Hardware Maintenance for the MX2020 Router.

For instructions about installing the mounting hardware, see Installing the MX2020 Mounting Hardware for a Four-Post Rack or Cabinet.

The weight and depth of the router depends on the type of cable management system installed.

With the standard or extended cable management system installed, use these guidelines:

  • The rack must have sufficient vertical usable space to accommodate the height of the router: 78.75 in. (200 cm). You can install one chassis in a rack. A typical four-post rack measures 84 in. (213.4 cm) high, 24 in. (61 cm) to 30 in. (76.2 cm) deep, and 19 in. (48.3 cm) wide (see Figure 1).

    Note:

    A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated Equipment (document number EIA-310-D) published by the Electronic Components Industry Association (ECIA) (http://www.ecianow.org).

  • The location of the rack must provide sufficient space to accommodate the depth of the router. The chassis with the standard cable management system is 35.72 in. (90.7 cm) deep.

  • The chassis with the extended cable management system is 37.46 in. (95.1 cm) deep.

  • The rack must be strong enough to support the weight of the fully configured router, up to 1,515 lb (687.19 kg).

Note:

For a complete list of chassis and component weights and measurements, see MX2020 Physical Specifications.

Note:

There must be a minimum of 45-U of usable rack space when installing the MX2020 router into a 45-U rack.

Figure 1: Typical Four-Post RackTypical Four-Post Rack

Spacing of Mounting Bracket Holes

The router can be mounted in any four-post rack or cabinet that provides holes or hole patterns spaced at 1 U (1.75 in.) increments. The front-mount flanges used to attach the chassis to a rack are designed to fasten to holes spaced at those distances.

Connection to the Building Structure

Always secure the rack to the structure of the building. If your geographical area is subject to earthquakes, bolt the rack to the floor. For maximum stability, also secure the rack to ceiling brackets.

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