5. If you are mounting the switch in a four-post rack or a cabinet, secure the rear mounting brackets
(rails).
Otherwise, skip to step 6 on page 78.
a. At the rear of the rack or cabinet, for each side, slide the rails between the previously mounted
front brackets and the two rows of pegs on either side of the switch.
Figure 51: 4-post brackets and screws positions
b. Secure the rear mounting brackets to the rack posts using suitable screws (not provided).
Be sure the switch is level.
6. If a grounding lug is present, ground the switch.
a. At one end of the wire, strip the insulation to expose 1/2 inch (12 mm) of bare wire.
b. Identify the grounding lug on the back of the switch.
c. Insert the stripped wire into the grounding lug.
d. Using a straight-tip torque screwdriver, tighten the retaining screw to 20 in‑lb (2.25 N m).
e. Connect the other end of the wire to a known reliable earth ground point at your site.
After the switch is secured to the rack or cabinet, install optional components using the instructions in
Installing Optional Components on page 78.
Then, if your switch does not have an installed power supply, install one or two power supplies using the
instructions in Installing Internal AC Power Supplies on page 79.
Installing Optional Components
After the switch is secured to the rack, install optional components.
ExtremeSwitching switches support the use of pluggable transceivers and cables in the SFP+, SFP28,
QSFP+, and QSFP28 formats.
For a list of the optical components supported with ExtremeSwitching devices, see the Extreme Optics
website.
Installing Optional Components
Installing Your Switch
78 ExtremeSwitching 5520 Series Hardware Installation Guide
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