4120 Switch Overview

The 4000 Series are ExtremeCloud IQ managed Layer 2 switches that are fully cloud managed. The 4000 Series maintains all the power and flexibility of a traditional enterprise access switch, while simplifying network operations. Visibility is centralized and actions are instantaneous. Zero-touch provisioning allows rapid deployment across sites, and machine learning tools help quickly isolate issues when troubleshooting. The 4000 Series also provides support for stacking and PoE.

Note

Note

An ExtremeCloud IQ Pilot license is required for each 4000 Series switch.

The 4120 family of switches consists of a 24-port and a 48-port model. Both models contain multi-gigabit (1/2.5Gb) and 90W PoE support across all access ports. The 4120 Series contains high-speed 4 x 10/25Gb uplink plus 2 x 100Gb uplink/stack ports, which makes it ideal as a wired concentrator for high-density Wi-Fi/IoT environments.

Management

An RJ45 serial console port on the switch enables you to connect a terminal and perform local management. An Ethernet management port can be used to connect the system to an out-of-band management network for administration. Alternatively, you can use an Ethernet cable to connect this port directly to a laptop to view and locally manage the switch configuration. The Ethernet management port supports 100/1000 Mbps speeds. The RJ45 serial console port is located on the rear panel of the switch.

There is one Micro-B USB console port located on the front panel. If the Micro-B USB console port is connected, it is selected over the RJ45 serial console port. The Micro-B USB console port disconnects when the switch is rebooted. You can re-connect the port if needed. When the Micro-B USB console is active, there is no support for the RJ45 serial console port.
Note

Note

Using a Micro-USB Type B to USB Type A cable, connect the Micro-USB Type B end to the switch, and the USB Type A end to a laptop or PC and complete the driver installation steps

You can manage 4000 Series switches using Bluetooth with mobile devices or laptops. Bluetooth is enabled by default. 4000 Series switches support the Extreme Networks Bluetooth 5.0 dongle (XN-USB-BT500-ADAPTER). 4120 Series switches have a Bluetooth LED that blinks green while pairing is in progress, and then becomes solid green when Bluetooth is connected. See the 4000 Series User Guide for your version of Switch Engine for more detailed information on the 4000 Series Cloud-managed switches.

There are also two USB 2.0 Type A ports on the front panel labeled USB 1 and USB 2. They can host removable devices like flash drives.

Cooling

Fixed internal switch fans in the 4120 Series provide front-to-back airflow for switch cooling. The internal fans are not responsible for cooling the removable power supply module; the power supply module has an integrated cooling fan that operates independently of the switch fan, which also cools from front-to-back.

Power Supplies

Each 4120 Series has a fixed internal AC power supply that provides enough power for the basic power needs of the switch and a basic POE power budget. For power redundancy and a higher POE power budget, the 4120 Series also supports the addition of a hot-swappable AC power supply. See Max PoE Power Budget for more information.

The hot-swappable AC power supply has an integrated cooling fan that operates independently of the switch fans, and also provides front-to-back cooling. For more information about power supplies, see Power Supplies for Use with Your Switch.

Stacking Ports

Each switch comes equipped with two stacking ports, also referred to as Universal Ethernet ports. The stacking ports are labeled U1 and U2 and are located on the front of the switch. When running Switch Engine, these ports can be used in either stacking mode or Ethernet mode. When in stacking mode, up to eight systems can be stacked using qualified direct attach cables or optical transceivers. The U1 and U2 ports operate as stacking ports by default. Use the disable stacking-support command to set the U1 and U2 ports in Ethernet mode.

Note

Note

4120 Series switches can only be stacked with themselves.

Stacking cables are ordered separately.

For information about optical modules, see the Extreme Optics website.

For information about stacking, see Build Stacks.

Operating Temperatures

All 4120 Series switch models support an operating range from 0°C (32°F) to 50°C (122°F).

Feature Licensing

A base license for the 4120 Series is the only license supported in Switch Engine. For additional Switch Engine licensing information see the Feature License Requirements for your version of the Switch Engine software.