Optical Cables
Direct-attach copper and ber cables provide connections between populated SFP+,
SFP28, QSFP+, and QSFP28 ports.
Breakout cables
The copper breakout cables are terminated with optical connectors and are available
in 1m, 3m, 5m, or greater lengths. No additional connectors or cabling are required
when using the copper breakout. When using the ber breakout cables, additional
10Gb optics are required.
For 7520 Series switches running Fabric Engine, interface 1/51 supports up to 4 10GbE
or up to 4 25GbE ports in breakout mode when using the appropriate optics. See the
Extreme Optics website to determine the appropriate optics.
For 7520-48Y-8C switches running Switch Engine, interfaces 0/51 and 0/53 support up
to 8 10GbE, 8 25GbE, 2 40GbE, or 2 100GbE ports in breakout mode when using the
appropriate optics. For 7520-48XT-6C switches running Switch Engine, interfaces 0/51
and 0/52 support up to 8 10GbE, 8 25GbE, 2 40GbE, or 2 100GbE ports in breakout mode
when using the appropriate optics. See the Extreme Optics website to determine the
appropriate optics.
Install Internal Power Supplies
If your device does not come with an installed internal power supply, you can install one
or two power supplies.
This switch supports 800 W AC power supply units.
All installed power supplies must have the same airow direction (front-to-back or
back-to-front) and must also match the airow direction of the fan modules.
• If the power supply module has a red tab, the airow is front-to-back.
• If the power supply module has a blue tab, the airow is back-to-front.
Follow the instructions in the following sections to install the appropriate power supply
and connect power to the switch.
• Install an 800 W Internal AC Power Supply on page 60
• Install an 800 W Internal DC Power Supply on page 63
Install an 800 W Internal AC Power Supply
To install an 800 W AC power supply in a switch, follow these instructions.
Optical Cables Install the Switch
60 Extreme 7520 Hardware Installation Guide
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