These are NEW IN BOX (Factory Tape Broken). Dual PSU. No Expansion Modules.Dell Support site says:Limited Lifetime/Extended Warranty Expires 07 APR 2046Dell Networking N4000 is a series of energy-efficient and cost-effective 10GbE switches designed for modernizing and scaling network infrastructure. N4000 switches utilize a comprehensive enterprise-class Layer 2 and Layer 3 feature set, deliver consistent, simplified management and offer high-availability device and network design.

The N4000 switch series offers a power-efficient and resilient 10 Gigabit Ethernet (10GbE) switching solution with support for 40GbE uplinks for advanced Layer 3 distribution for offices and campus networks. The N4000 switch series has high-performance capabilities and wire-speed performance utilizing a non-blocking architecture to easily handle unexpected traffic loads. The N4000 series includes dual internal hot-swappable 80PLUS-certified power supplies for high availability and power efficiency. The switches offer simple management and scalability via flexible user port stacking at 10Gbps or 40Gbps. The high-availability stacking architecture allows management of up to 12 switches from a single IP address.

Modernize campus network architectures

Modernize campus network architectures with a power-efficient and resilient 10/40GbE switching solution for environments requiring high throughput and availability at the aggregation or core. For greater interoperability in multivendor networks, all N-Series switches offer the latest open-standard protocols and include technology to interface with Cisco protocol RPVST+ and devices using CDP.

Achieve high availability and full bandwidth utilization with Multichassis Link Aggregation (MLAG). All N-Series switches support MLAG to create active/active loop-free redundancy without spanning tree. Server rooms can deliver reliable server and storage connectivity with features to help save time and avoid configuration errors. These high density 24-port or 48-port 10GbE switches are ready for converged fabric requirements for SAN and LAN networks with loss-less operation for iSCSI environments with Data Center Bridging (DCB). The N4000 series is also fully tested and validated to work with Dell EqualLogic™ PS-Series storage arrays.

Leverage familiar tools and practices

All N-Series switches include Dell Networking OS 6 designed for easier deployment, greater interoperability and a lower learning curve for network administrators. One common command line interface (CLI) and GUI using a well-known command language gets skilled network administrators productive quickly. This allows network administrators to maintain consistent configurations by running one OS release across all N-Series products. With USB autoconfiguration, network administrators can rapidly deploy mirrored configurations to numerous devices by simply inserting a USB key.

Deploy with confidence at any scale

N4000 series switches help create performance assurance with a data rate up to 1.28Tbps (full duplex) and a forwarding rate up to 952Mpps. Scale easily with 10/40Gbps user port stacking supporting distances up to 100 meters. Switch stacks of up to 672 10GbE ports can be managed from a single screen using the highly-available stacking architecture for high-density aggregation with seamless redundant availability. N-Series switches help provide certainty with a lifetime warranty that covers software upgrades, hardware repair or replacement as well as optics and cables purchased with the switch.

Upgrade your network

N-Series is a family of energy-efficient and cost-effective 1GbE and 10GbE switches designed for modernizing and scaling network infrastructure. The N4000 Series allows you to apply 10/40GbE wire-speed flexibility to your existing campus network with high-performance, non-blocking switches that:

• Use MLAG for multipath loop-free redundancy without spanning tree to enable full-bandwidth utilizationand high availability
• Promote greater interoperability through interfaces with Cisco's Rapid Per VLAN Spanning Tree (RPVST+)and devices using Cisco Discovery Protocol (CDP)
• Offer a more flexible choice in your network by uniting products with the latest open standard protocols
• Feature advanced IPv4 and IPv6 Layer 3 routing, security and scalability features
• Converged network support for DCB with Priority Flow Control (802.1Qbb), ETS (802.1Qaz), DCBx, iSCSI TLV Support.
• Plug-and-play configuration with Dell EqualLogic iSCSI storage arrays with one-command iSCSI setup that alleviates multiple-step configuration and potential configuration errors