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Rack-Mounted Installation
We recommend that you use a standard EIA distribution rack.
See Equipment Rack Requirements for detailed rack information.
Installation Guidelines
Before installing the systems in a rack, consider the following
guidelines and refer to Figure 15:
- You can install up to 3 ERX-14xx models, 6 ERX-7xx models,
or 14 ERX-310 routers in a single 7-ft. (2.1 m) rack.
Installing multiple systems in a single rack enables you to
maximize your available space.
- You can install an ERX-14xx model, an ERX-7xx model, and
an ERX-310 router together in the same rack. (See Figure 15.)
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Caution:
If you install an ERX-7xx model or ERX-310 router directly above
an ERX-14xx model in the same rack, you must install a plenum between
the ERX-7xx model or ERX-310 router and the ERX-14xx model so that
the air can circulate between the systems. (See Figure 53.) This plenum is available from Juniper Networks.
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If you install an ERX-14xx model above an ERX-7xx model or ERX-310
router, there is no need to install a plenum between the units because
the ERX-7xx models and ERX-310 routers vent air out the side of the
chassis.
- Install heavier systems, such as an ERX-14xx model, on
the bottom of the rack. Mount lighter systems, such as the ERX-310
router, higher in the rack.
Figure 15: ERX Routers Installed
in Recommended Order
Safety Guidelines
Observe the following safety guidelines when mounting the router
in a rack.
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Warning:
Install equipment in the rack from the bottom upward. This helps
to maintain the stability of the rack and reduces the chance of the
rack tipping over.
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Warning:
Three people are required to install the router in a rack: two
to lift the system into position and one to screw it to the rack.
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Caution:
Evaluate the overall loading of the branch circuit before you
install any equipment into a rack.
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Warning:
Connect the router or rack to ground (earth), and ensure that
a reliable grounding path is maintained in the rack.
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Warning:
Do not work on the system or connect or disconnect cables during
lightning activity.
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Warning:
Be sure circuit breakers for the power source are in the OFF
position before attaching power cables.
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Warning:
Before servicing the router, turn off the power.
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Warning:
Remove jewelry (including rings, necklaces, and watches) before
working on equipment that is connected to power lines. Metal objects
heat up when connected to power and ground and can cause serious burns
or become welded to the terminals.
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Warning:
Do not insert any metal object, such as a screwdriver, into
an open slot or the backplane. Doing so can cause electric shock and
serious burns.
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Warning:
The ERX-310 router AC model has more than one power-supply cord.
Disconnect two power cords before servicing to
avoid electric shock.
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Preparing the Equipment Racks
Following your installation plan, use a tape measure and marking
pen to measure and mark space on each equipment rack for each router
component. For horizontal spacing, follow Network Equipment Building
System (NEBS) requirements. If you choose not to install a plenum,
be sure to include 2 U of space between each chassis for proper exhaust.
A plenum, however, is highly recommended.
Installing the Router
To complete the installation of the router in a rack, you need:
- A Phillips screwdriver
- Depending on the router, up to eight 10-32 x 3/8 Phillips
screws (provided with the router) for each router to be installed
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Warning:
Three people are required to install the router in a rack: two
to lift the system into position and one to screw it to the rack.
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Caution:
Make sure all persons handling a router wear an antistatic device.
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To install the router in the rack:
- With one person standing on the left side of
the router and another standing on the right side, lift the router
into the rack.
- Position the router in its designated location
in the equipment rack. Make sure the holes of the mounting brackets
align evenly with the holes of the equipment rack on both sides.
- Starting at the bottom, have the third person secure
the router in the equipment rack by using the 10-32 x 3/8 Phillips
screws.
- Connect the necessary cables. (See Cabling ERX Routers for instructions on installing
the cables.)
Figure 15 illustrates a
distribution rack with one ERX-310 router, one ERX-7xx model, and
one ERX-14xx model installed.
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