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    Rack Requirements for an XRE200 External Routing Engine

    You can mount the external Routing Engine on two-post racks or four-post racks.

    Rack requirements consist of:

    • Rack type
    • Mounting bracket hole spacing
    • Rack size and strength
    • Rack connection to the building structure

    Table 1 provides the rack requirements and specifications for the external Routing Engine.

    Table 1: Rack Requirements and Specifications for the External Routing Engine

    Rack Requirement

    Guidelines

    Rack type

    Use a two-post rack or a four-post rack. You can mount the switch on any two-post or four-post rack that provides bracket holes or hole patterns spaced at 1 U (1.75 in./4.45 cm) increments and that meets the size and strength requirements to support the weight.

    A U is the standard rack unit defined in Cabinets, Racks, Panels, and Associated Equipment published by the Electronics Industry Association and maintained by the Electronic Components Industry Association (http://www.ecianow.org).

    The rack must meet the strength requirements to support the weight of the chassis.

    Mounting bracket hole spacing

    The holes in the mounting brackets are spaced at 1 U (1.75 in. or 4.45 cm), so that the external Routing Engine can be mounted in any rack that provides holes spaced at that distance.

    Rack size and strength

    • Ensure that the rack complies with one of these standards:
      • A 19-in. rack as defined in Cabinets, Racks, Panels, and Associated Equipment published by the Electronics Industry Association and maintained by the Electronic 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 (http://www.etsi.org).

        The horizontal spacing between the rails in a rack that complies with this standard is usually wider than the external Routing Engine's mounting brackets, which measure 19 in. (48.2 cm) from outer edge to outer edge. Use approved wing devices to narrow the opening between the rails as required.

    • Ensure that the rack is one of the following standard lengths:
      • 23.62 in. (600 mm)
      • 30 in. (762 mm)
      • 21.5 in. (546 mm)
    • Ensure that the rack rails are spaced widely enough to accommodate the external Routing Engine chassis' external dimensions. The outer edges of the front-mounting brackets extend the width of the chassis to 19 in. (48.2 cm).
    • The rack must be strong enough to support the weight of the external Routing Engine.
    • Ensure that the spacing of rails and adjacent racks allows for the proper clearance around the external Routing Engine and rack.

    Rack connection to building structure

    • Secure the rack to the building structure.
    • If earthquakes are a possibility in your geographical area, secure the rack to the floor.
    • Secure the rack to the ceiling brackets as well as wall or floor brackets for maximum stability.

    One pair of mounting brackets for mounting the external Routing Engine on two or four posts of a rack is supplied with each external Routing Engine.

    Modified: 2017-03-10