ExtremeSwitching VSP 4900 Series switches provide support that can be deployed in either Enterprise LAN or high-density, top-of-rack high-performance enterprise and aggregation applications. The switches also provide a modular Versatile Interface Module (VIM) slot that allows a user to choose an uplink model that is suitable for their needs. The VSP 4900 Series switches run the VOSS operating platform.
The 10/100/1000BASE-T ports on the VSP 4900-48P model can operate in half-duplex mode when operating at 10Mbps or 100Mbps. In addition, this model supports IEEE 802.1AE MACsec.
The switch supports connections using the RJ45 serial console port, the Ethernet management port, or the Micro-USB Type B port to view and manage the switch configuration. For more information on switch connection methods, see Manage Your Switch. For switch connection details, see Connect to a Management Console.
After connecting to your switch, it can be flexibly configured and operated though the network or the command-line interface (CLI), either remotely or locally. You can access management functions on the switch using the VOSS operating system through a web-based GUI or generic command-line interface (CLI) client. For more information on switch configuration and operation methods, see Manage Your Switch.

Note
There are also two USB 2.0 Type A ports labeled USB 1 and USB 2.Each switch is cooled by hot-swappable field replaceable fan modules. The switch supports front-to-back airflow for switch cooling. Switch fans are not responsible for cooling the power supplies; power supplies have integrated cooling fans that operate independently of the switch fan.
For more information about the fan modules used in the switch, see Fan Modules for Use with Your Switch.
Each switch supports two hot-swappable modular AC power supplies. The power supplies provide enough power for the needs of the switch. Power supplies have integrated cooling fans that operate independently of the switch fans for power supply cooling and are not responsible for cooling the switch. The powers supplies support front-to-back airflow for power supply cooling.
For more information about the power supplies used in the switch, see Power Supplies for Use with Your Switch.
The switch supports hardware accessories that expand the capabilities of the switch. Collectively, they are referred to as expansion modules. The following expansion modules are compatible with the switch:
For more information, see Expansion Modules for Use with Your Switch.
All VSP 4900 Series switches support an operating range from 0°C (32°F) to 50°C (122°F).
For information about licensing options for VOSS, see Administering VSP Operating System Software.
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