X51N7 - Dell PowerSwitch Z9100-ON 32x100GbE QSFP28 Switch

Dell EMC PowerSwitch Z9100-ON: 32-port 100GbE QSFP28 + 2 SFP+ fixed switch for high-performance data center and enterprise networking.

The Dell X51N7 is the manufacturer part number for the Dell EMC PowerSwitch Z9100-ON, a 1U fixed-configuration, high-density Ethernet switch built for high-performance data center and enterprise computing environments. It provides 32 fixed QSFP28 ports supporting flexible speed configurations of up to 100GbE, along with 2 fixed SFP+ ports for 1/10GbE connectivity. Leveraging a non-blocking switching architecture, the Z9100-ON delivers line-rate Layer 2 and Layer 3 forwarding, making it suitable for top-of-rack (ToR), end-of-row (EoR), spine, or core aggregation deployments. The switch ships with dual redundant hot-swappable power supplies and configurable airflow direction, and runs Dell EMC's Networking OS9, with an upgrade path available to OS10 Enterprise for advanced automation and SmartFabric Services capabilities.

• Manufacturer: Dell Technologies (Dell EMC)
• Product Line: PowerSwitch
• Product Series: Z-Series
• Model: Z9100-ON
• Product Type: Fixed-configuration Ethernet Switch
• Main Ports: 32 x fixed QSFP28 ports (10/25/40/50/100GbE)
• Uplink Ports: 2 x fixed SFP+ ports (1/10GbE)
• Port Density Options: 32x100GbE, 64x50GbE, 32x40GbE, 128x25GbE, or 128x10GbE (via breakout)
• Switching Capacity: 6.4 Tbps (Full Duplex) I/O bandwidth
• Forwarding Rate: Up to 3300-4400 Mpps (varies by source)
• Latency: Sub 500ns
• MAC Address Table: 136,000 entries
• Packet Buffer Memory: 16MB
• CPU Memory: 8GB
• Operating System: Dell EMC Networking OS9 (default), upgradeable to OS10 Enterprise
• Power Supply: 2 x redundant, hot-swappable 750W AC PSUs
• Max Power Consumption: 605 Watts
• Typical Power Consumption: 195 Watts
• PoE: Not supported
• Airflow: Configurable: Standard (I/O to PSU) or Reverse (PSU to I/O)
• Management Ports: 1 RJ45 console/management, 1 10/100/1000BaseT Ethernet, 1 USB 2.0 Type A, 1 MicroUSB-B console
• Management Protocols: SNMP, SSH, Telnet
• Physical Form Factor: 1 Rack Unit (1U)
• Dimensions: 434 x 320 x 44 mm (17.09 x 12.60 x 1.74 inches, W x D x H)
• Weight: Approximately 22 lbs (9.98 kg)
• Operating Temperature: 32°F to 113°F (0°C to 45°C)
• Operating Humidity: 10% to 90% RH, non-condensing
• Included Accessories: 1 x Rail Kit, 1 x Console Cable
• Warranty: 1 year replacement warranty (as offered by refurbished resellers)

• 32 fixed QSFP28 ports supporting flexible 10/25/40/50/100GbE speeds
• 2 additional fixed SFP+ ports for 1/10GbE legacy connectivity
• Non-blocking switching architecture delivering line-rate L2/L3 forwarding
• 6.4 Tbps switching I/O bandwidth for high-throughput data center traffic
• Sub-500ns low latency switching performance
• Dual redundant, hot-swappable 750W AC power supplies
• Configurable standard or reverse airflow direction for flexible cooling
• Runs Dell EMC OS9 by default, upgradeable to OS10 Enterprise
• SmartFabric Services support for automated network provisioning and management
• Priority-based flow control (PFC), DCBX, and ETS for data center bridging environments
• Compact 1U design conserving rack space in dense deployments
• Supports breakout cabling for migration flexibility between speed tiers

Designed for high-performance data center and enterprise network deployments requiring dense, flexible Ethernet connectivity.

• Top-of-rack (ToR) switching in enterprise and cloud data centers
• End-of-row (EoR) aggregation for high-density server racks
• Spine layer switching in leaf-spine data center fabric architectures
• Migration path from 10/40GbE to 25/50/100GbE network infrastructure
• High-performance computing (HPC) cluster interconnects
• Software-defined data center (SDDC) network fabric deployments
• Consolidating multiple lower-speed connections via breakout cabling

• High port density conserves valuable rack space
• Non-blocking architecture ensures consistent performance
• Redundant PSUs improve uptime and reliability
• Flexible airflow supports hot/cold aisle cooling designs
• OS10 upgrade path enables modern SDN automation
• Sub-500ns latency benefits latency-sensitive workloads

• Form Factor: 1 Rack Unit (1U), Standard 1U chassis
• Dimensions (W x D x H): 434 x 320 x 44 mm (17.09 x 12.60 x 1.74 inches)
• Weight: Approximately 22 lbs (9.98 kg)
• Cooling: Removable fan modules with configurable airflow direction

Per available documentation, this switch is validated for use with the following Dell EMC networking and server platforms:

• Dell EMC Networking S4810 switches
• Dell EMC Networking S5000 switches
• Dell EMC Networking S6000/S6010 switches
• Dell EMC PowerSwitch S5212 / S5224 switches
• Dell EMC Networking S5224/S5232/S5248 switches
• Dell PowerEdge FC640 servers
• Dell PowerEdge M640 servers
• Dell PowerEdge R430/R440/R540 servers
• Dell PowerEdge R6415/R7415/R7425 servers
• Dell PowerEdge T440/T640 servers

Note: Compatibility listings are based on Dell EMC accessory and interoperability documentation (e.g., transceivers/rail kits); always confirm exact model interoperability with Dell's official compatibility matrix before deployment.

• Dell EMC PowerSwitch Z9100-ON switch unit
• 1 x Rail Kit for rack mounting
• 1 x Console Cable
• 2 x Hot-swappable 750W AC Power Supply Units

Q: What is the Dell X51N7 part number?

A: X51N7 is Dell's manufacturer part number for the PowerSwitch Z9100-ON, a 32-port 100GbE QSFP28 fixed switch with 2 additional SFP+ ports, as confirmed by Dell's official spec sheet and multiple resellers.

Q: How many ports does the Dell X51N7 (Z9100-ON) have?

A: It has 32 fixed QSFP28 ports configurable for 10/25/40/50/100GbE speeds, plus 2 fixed SFP+ ports for 1/10GbE connectivity.

Q: What is the switching capacity of the Z9100-ON?

A: According to reseller and independent review documentation, the switch delivers a switching I/O bandwidth of 6.4 Tbps in full duplex mode.

Q: What operating system does the X51N7 switch run?

A: The switch ships by default with Dell EMC Networking OS9, with an available upgrade path to OS10 Enterprise for advanced automation and SmartFabric Services features.

Q: Does the Dell X51N7 support Power over Ethernet (PoE)?

A: No, PoE is not applicable or supported on this switch, as confirmed by multiple reseller specification listings.

Q: What are the physical dimensions of the Z9100-ON switch?

A: Per Dell's official installation manual, the switch measures 434 x 320 x 44 mm (17.09 x 12.60 x 1.74 inches) in a 1U rack-mount form factor.

Q: What power supplies come with the X51N7 switch?

A: It includes 2 redundant, hot-swappable 750W AC power supply units to ensure continuous operation and power redundancy.

Q: What is the latency of the Dell Z9100-ON switch?

A: Independent reseller technical documentation lists the switch's latency as sub-500 nanoseconds, supporting latency-sensitive data center workloads.