WHXMD - Dell EMC N2128PX-ON 28-Port L3 PoE+ Switch

Dell EMC Networking N2128PX-ON, a 28-port Layer 3 managed PoE+ switch with 24 GbE, 4 multi-gig, and 2x 10GbE SFP+ uplinks for enterprise networks.

WHXMD is the Dell part number for the Dell EMC Networking N2128PX-ON, a 1U rack-mountable Layer 3 managed switch from the N2100-ON series. It combines 24 ports of 10/100/1000BASE-T with PoE+, 4 multi-gigabit (100M/1G/2.5G/5G) PoE ports, and 2 fixed 10 Gigabit SFP+ uplink ports, giving a total of 28 front-panel ports. Built on a non-blocking switching architecture, it delivers wire-speed forwarding for demanding access-layer and small-core deployments. The switch supports stacking with other N2000/N2100-ON units via rear mini-SAS stacking ports, Layer 3 routing (static and dynamic), VLANs, ACLs, QoS, and MLAG for redundancy, making it suitable for campus networks, branch offices, and data center access layers that need PoE-powered devices such as APs, IP phones, and cameras alongside high-speed uplinks.

• Manufacturer: Dell EMC
• Manufacturer Part Number: WHXMD (also listed as 0WHXMD)
• Product Line: Dell EMC PowerSwitch / Networking N-Series
• Product Series: N2100-ON
• Model: N2128PX-ON
• Product Type: Layer 3 Managed Ethernet Switch, Stackable
• Total Ports: 28 ports
• Copper Ports: 24 x 10/100/1000BASE-T PoE+
• Multi-Gigabit Ports: 4 x 100M/1G/2.5G/5G PoE
• Uplink Ports: 2 x 10 Gigabit SFP+
• Switching Capacity: 220 Gbps (per distributor specification; some listings cite 192 Gbps)
• Forwarding Rate: 256 Mpps
• MAC Address Table: Up to 32,000 entries
• VLANs Supported: Up to 4,094 VLANs
• PoE: PoE+ (802.3at) on GbE ports, up to 30.8W; PoE 60W on multi-gig ports
• Power Supply: Integrated 1,000W AC power supply (80PLUS efficient)
• Stacking: Rear mini-SAS stacking ports, up to 12 units in a stack
• Management: Web UI, CLI, SNMP, SSH, Telnet, USB auto-configuration
• Security: 802.1X, RADIUS, ACLs (L2/L3/L4), DHCP snooping, port security
• Routing: Static and dynamic IP routing, OSPF, VRRP support
• Dimensions (H x W x D): 1.7 in x 17.3 in x 15.2 in (43.5 x 440 x 387 mm)
• Weight: Approx. 15.05 lbs / 6.8 kg
• Operating Temperature: 32°F to 113°F (0°C to 45°C)
• Max Power Consumption: Approx. 1,039.8 W (max thermal output ~6,069.8 BTU/hr)
• Form Factor: 1U rack-mountable
• Console Port: RJ-45 console port with RS-232 signaling
• Operating System: Dell Networking OS6
• Condition Sold: Primarily available as refurbished/renewed hardware via resellers

• 28-port Layer 3 managed switch with mixed copper and fiber uplinks
• 24 GbE PoE+ ports plus 4 multi-gigabit (up to 5G) PoE ports
• 2 integrated 10 Gigabit SFP+ ports for high-speed uplinks
• Non-blocking switching fabric for wire-speed performance
• Stackable up to 12 units via rear mini-SAS stacking ports
• Multi-Chassis Link Aggregation (MLAG) for active-active redundancy
• Layer 3 routing with static routes and dynamic routing protocol support
• Comprehensive security: 802.1X, RADIUS, ACLs, DHCP snooping, port security
• Energy-Efficient Ethernet and short-cable detection for power savings
• USB auto-configuration for rapid, TFTP-free deployment
• Dual firmware images for reliable upgrades
• Dell Fresh Air compliance for operation up to 45°C

Designed as a PoE-capable access-layer switch for enterprise, campus, and data center edge networking.

• Powering and connecting wireless access points across office floors
• Deploying VoIP handsets and video conferencing endpoints via PoE+
• Supporting IP security cameras and surveillance infrastructure
• Providing high-speed 10GbE uplinks from access switches to the core
• Building stacked, high-availability wiring closets (IDF/MDF) for campus networks
• Segmenting departmental or guest traffic using VLANs and ACLs
• Enabling Layer 3 routing at the network edge for simplified traffic management

• High port density in a compact 1U form factor
• PoE+ and multi-gig ports power modern edge devices
• 10GbE SFP+ uplinks reduce core network bottlenecks
• Stacking simplifies management of multiple switches
• Layer 3 routing reduces need for separate routers
• Energy-efficient design lowers operating costs

• Form Factor: 1U rack-mountable
• Dimensions (H x W x D): 1.7 in x 17.3 in x 15.2 in (43.5 x 440 x 387 mm)
• Weight: Approx. 15.05 lbs / 6.8 kg
• Airflow: Front-to-back (I/O to power supply)

Per available distributor and manufacturer documentation, this switch is validated for use with:

• Dell EMC N2000 Series switches (mixed stacking)
• Dell EMC N2100-ON Series switches
• Dell Networking RPS720 redundant power supply
• Dell Networking MPS1000 external power supply (N2128PX-ON specific)
• Dell EMC N-Series firmware images (e.g., N2100Stdv6.6.x / 6.7.x)
• Standard SFP+ transceivers and DAC cables for 10GbE uplinks
• Rack mounting kits with standard 19-inch server racks

Note: Mixed stacking with N2000 Series switches requires a matching combined firmware image (e.g., N2000N2100Stdv6.6.0.x.itb); newer N2200-ON/N3200-ON series switches are documented separately and are not part of the same mixed-stack firmware image.

• Dell EMC N2128PX-ON switch unit
• Rack mounting kit with 2 mounting brackets, bolts, and cage nuts
• RJ-45 to female DB-9 console cable
• Power cable
• Getting Started Guide

Q: What product does the MPN WHXMD correspond to?

A: WHXMD is Dell's part number for the Dell EMC Networking N2128PX-ON, a 28-port Layer 3 managed PoE+ switch, as confirmed by multiple distributor listings and Dell's own support pages.

Q: How many ports does the N2128PX-ON have?

A: It has 28 total ports: 24 x 10/100/1000BASE-T PoE+ ports, 4 x multi-gigabit (up to 5G) PoE ports, and 2 x 10 Gigabit SFP+ uplink ports.

Q: Does the switch support stacking?

A: Yes, it supports stacking with other N2128PX-ON and N2000 Series switches via rear mini-SAS stacking ports, with mixed stacks of up to 8-12 units depending on firmware version.

Q: What PoE standard does it support?

A: The switch supports PoE+ (IEEE 802.3at) on its Gigabit ports, delivering up to about 30.8W per port, with higher PoE budgets available on its multi-gigabit ports.

Q: Is this switch Layer 2 or Layer 3?

A: It is a Layer 3 managed switch, supporting VLANs, static and dynamic IP routing, and advanced traffic management features.

Q: What operating system does the N2128PX-ON run?

A: It runs Dell Networking OS6, manageable via web interface, CLI, or SNMP.

Q: What is the switching capacity of this switch?

A: Distributor specifications list a switching fabric bandwidth of 220 Gbps and a forwarding rate of 256 Mpps, though some third-party listings cite a slightly different 192 Gbps figure.

Q: Is the WHXMD switch new or refurbished when purchased?

A: Most available listings for MPN WHXMD are sold as refurbished units through IT hardware resellers, typically backed by limited warranties.