Installation Guide

Stacking
Each 5520 unit comes equipped with two 40GbE stacking ports, also referred to as Universal Ethernet
ports. When running ExtremeEXOS, up to eight systems can be stacked using qualified QSFP28 and
QSFP+ direct attach cables and optical transceivers located on the front panel of the switch. Standard
40 Gb Ethernet Optics and passive and active cables can be used in the QSFP28 ports for stacking
5520s together using SummitStack-V160.
When running VOSS, 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 VOSS User Guide Version 8.3.
Stacking cables for 5520 switches are ordered separately.
For information about QSFP28 and QSFP+ optical modules, see the Extreme Optics website.
Operating Temperatures
All 5520 switch models support an operating range from 0°C to 50°C. Temperature restrictions apply
for some models at high altitudes.
Feature Licensing
The ExtremeSwitching 5520 Series switches support Unified Licensing, so that you can use them with
multiple operating systems. There are two methods of acquiring feature licenses: manual or through
ExtremeCloud IQ™ (XIQ).
For EXOS licensing, see ExtremeXOS 31.1 Feature License Requirements.
For VOSS licensing, see Release Notes for VOSS 8.2.5.
For XIQ licensing, see Licensing Information.
5520-24T Switch Features
The front panel of the 5520-24T switch includes:
• 24 10/100/1000Mb full/half duplex MACsec capable ports
Note
Half-duplex is not supported on these ports when operating at 1Gbps.
• 1 VIM slot
• 1 Type-A USB port
• 1 Micro-B USB console port
• 2 Stacking (Universal Ethernet)/QSFP28 ports
ExtremeSwitching 5520 Series Overview
Stacking
ExtremeSwitching 5520 Series Hardware Installation Guide 13