Power Supplies; Stacking - Extreme Networks Extreme 7520 Series Hardware Installation Manual

Extreme 7520 Series Overview
Fans are ordered separately for base models 7520-48Y-8C and 7520-48XT-6C. Fans are
included with other models.

Power Supplies

Hot swappable 800 W AC or DC power supplies are available to power the switch. The
power supplies have integrated cooling fans that operate independently of the switch
fans. The fans provide either front-to-back or back-to-front airflow. The direction of the
airflow in the power supplies and the switch fans must be the same. The two power
supply slots on all models are located on the rear panel. For more information about
the power supplies used in the 7520 Series switches, see
Your Switch
Power supplies are ordered separately for base models 7520-48Y-8C and 7520-48XT-6C.
Power supplies are included with other models.

Stacking

Each 7520 Series switch comes equipped with two high-speed 100Gb stacking ports,
also referred to as Universal Ethernet ports. When running Switch Engine, up to
eight systems can be stacked using qualified QSFP28 direct attach cables and optical
transceivers located on the front panel of the switch. Stacking is not supported when
running Fabric Engine. The stacking ports on 7520-48XT-6C models are ports 53 and 54.
The stacking ports on 7520-48Y-8C models are ports 55 and 56.
Note
The two stacking/QSFP ports are "Universal Ethernet" ports. These ports can
operate either as stacking ports with Switch Engine or as Ethernet ports with
Switch Engine and with Fabric Engine in non-fabric mode.
By default the stacking ports operate as Ethernet ports. Use the enable stacking-
support command to set the stacking ports in stacking mode.
When running Fabric Engine, the stacking (or Universal Ethernet) ports are reserved
for use by advanced features on the switch by default. For more information, see
the advanced-feature-bandwidth-reservation Boot Flag documentation in the
Engine User Guide for your version of the Fabric Engine operating system located at
https://www.extremenetworks.com/support/documentation/fabric-engine/
Stacking cables for 7520 Series switches are ordered separately.
For information about QSFP28 and QSFP+ optical modules, see the
website.
on page 18.
Power Supplies for Use with
Extreme 7520 Hardware Installation Guide
Power Supplies
Fabric
Extreme Optics
13