KY5C4 - Dell PowerSwitch Z9100-ON 32-Port 100GbE Switch

Dell EMC PowerSwitch Z9100-ON, 32x QSFP28 100GbE + 2x SFP+ ports, 6.4Tbps non-blocking Layer 3 data center switch.

The Dell KY5C4 (0KY5C4) is the manufacturer part number for the Dell EMC PowerSwitch Z9100-ON, a 1RU high-density open networking switch built for high-performance data center and computing environments. It provides flexible port configurations including 32 ports of 100GbE (QSFP28), 64 of 50GbE, 32 of 40GbE, 128 of 25GbE, or 128 of 10GbE, plus two SFP+ ports for 10GbE/1GbE/100MbE. Leveraging a non-blocking switching architecture, it delivers line-rate Layer 2 and Layer 3 forwarding with up to 6.4Tbps of switching I/O bandwidth. Designed to ease migration toward 100Gbps data center cores, it supports Dell EMC Networking OS9, OS10, or select third-party network operating systems, along with advanced DCB features such as PFC, DCBX, and ETS for lossless Ethernet fabrics.

• Manufacturer: Dell / Dell EMC (Dell Technologies)
• Product Family: PowerSwitch Z-Series
• Product Series: Z9100-ON
• Model / MPN: Z9100-ON (KY5C4 / 0KY5C4)
• Product Type: Open Networking (ON) Layer 3 managed fixed switch
• Ports: 32x QSFP28 (100GbE) + 2x SFP+ (10GbE/1GbE/100MbE); flexible configs up to 128 ports of 25GbE or 10GbE
• Switching I/O Bandwidth: 6.4 Tbps (Full Duplex)
• Forwarding Capacity: Up to 3300 Mpps
• MAC Address Table: 136,000 entries
• IPv4/IPv6 Unicast Routes: 136K IPv4 / 68K IPv6
• Latency: Sub-microsecond (reported as under 500ns by third-party sources)
• Control Processor / CPU: Intel Rangeley, 4 cores
• Memory: 3 GB RAM
• Flash/Bootflash: 16 GB bootflash memory
• Operating System: Dell EMC Networking OS9 or OS10 (dual-boot capable); select third-party NOS support
• Management Interfaces: 1x RJ45 console/mgmt (RS232), 1x 10/100/1000BASE-T mgmt Ethernet, 1x USB 2.0 Type-A storage port, 1x micro-USB Type-B console port
• Security: 802.1X Network Access Control, RADIUS/TACACS+, SSHv2, AES cipher in SNMPv3
• Power Supply: 100–240 VAC, 50/60 Hz, dual redundant hot-swappable
• Max Power Consumption: 605 Watts
• Typical Power Consumption: 195 Watts
• Operating Temperature: 32°F to 113°F (0°C to 45°C)
• Storage Temperature: -40°F to 158°F (-40°C to 70°C)
• Operating Humidity: 10–90% RH, non-condensing
• Dimensions: 1.72"H x 17.1"W x 18"D (1RU)
• Weight: 22 lbs (9.98 kg)
• Certifications: UL/CSA 60950-1, EN 60950-1, IEC 60950-1, EN 60825-1/2, FDA 21 CFR 1040.10/1040.11, AS/NZS CISPR 22 Class A, EU RoHS compliant
• Airflow: Front-to-back or reversed (back-to-front), field configurable when powered down

• 32 ports of 100GbE (QSFP28) with flexible 40/50/25/10GbE configurations
• Non-blocking switching architecture for line-rate L2/L3 forwarding
• Up to 6.4Tbps full-duplex switching I/O bandwidth
• Dual redundant, hot-swappable power supplies and fans
• Supports Dell EMC Networking OS9 and OS10 dual-boot
• Priority-based Flow Control (PFC), DCBX, and ETS for DCB environments
• 1RU compact form factor for high port density
• USB 2.0 and micro-USB ports for console and storage management
• Comprehensive IPv4/IPv6 unicast and multicast routing support
• 802.1X network access control and SSHv2 for secure management
• ReadyRails tool-less rack mounting system
• Fresh Air compliant operation up to 45°C ambient

Designed for high-density, high-performance data center core and spine/leaf networking.

• Data center spine or leaf switching in 100GbE fabrics
• High-performance computing (HPC) cluster interconnects
• Migration path from 10/40GbE to 25/50/100GbE infrastructure
• Software-defined data center (SDDC) network cores
• Cloud and enterprise data center aggregation layers
• Storage networking environments requiring DCB/lossless Ethernet
• Large-scale virtualization and hyperconverged infrastructure backbones

• High port density in a compact 1RU footprint
• Non-blocking architecture ensures line-rate performance
• Flexible port speeds ease network speed migration
• Redundant power and cooling improve uptime
• Open Networking OS choice adds deployment flexibility
• Advanced DCB features support lossless Ethernet fabrics

• Form Factor: 1 Rack Unit (1RU)
• Dimensions: 1.72" (H) x 17.1" (W) x 18" (D)
• Weight: 22 lbs (9.98 kg)
• Rack Mounting: Tool-less ReadyRails rack mounting system

Per available documentation, this product is validated for:

• Dell EMC Networking OS9 operating system
• Dell EMC Networking OS10 operating system
• QSFP28 100GbE optical and DAC transceivers/cables
• QSFP+ 40GbE optical and DAC transceivers/cables
• SFP+ 10GbE/1GbE transceivers
• Z9100 Cable Breakout Kits (MTP to LC, MMF/SMF variants)
• Dell EMC PowerEdge servers (e.g., R430, R440, R540, R6415, R7415, R7425, T440, T640) for data center connectivity
• Dell Networking S4810, S5000, S6000, S6010 switches for interoperability/upgrade paths
• Dell PowerSwitch S5212, S5224 switches

Note: Compatibility references reflect Dell's published accessory and interoperability listings; newer Z-Series models (e.g., Z9264F-ON, Z9332F-ON) share management tooling but are separate hardware platforms.

• Dell PowerSwitch Z9100-ON switch unit
• 2x hot-swappable redundant AC power supply units
• Standard airflow configuration (front-to-back)
• Dell EMC Networking OS9 license (as configured)

Q: What product does the Dell MPN KY5C4 correspond to?

A: KY5C4 (also listed as 0KY5C4) is the Dell part number for the PowerSwitch Z9100-ON, a 32-port 100GbE data center switch.

Q: How many ports does the Z9100-ON support?

A: It offers 32 QSFP28 ports for 100GbE plus 2 SFP+ ports, and can be flexibly configured for 64x50GbE, 32x40GbE, 128x25GbE, or 128x10GbE using breakout cabling.

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

A: The switch delivers up to 6.4 Tbps of switching I/O bandwidth in full-duplex mode, per Dell's official spec sheet.

Q: Which operating systems does this switch support?

A: It supports Dell EMC Networking OS9 and OS10, with dual-boot capability, and can also run select third-party Open Networking operating systems.

Q: What is the power consumption of the Z9100-ON?

A: Maximum power consumption is 605 Watts, with typical consumption around 195 Watts, according to Dell's spec sheet.

Q: What is the operating temperature range for this switch?

A: It is rated for operation from 32°F to 113°F (0°C to 45°C) with Fresh Air compliance up to 45°C ambient.

Q: How much memory and CPU does the Z9100-ON control processor have?

A: Per system CLI output shared by a reseller, the switch uses an Intel Rangeley control processor with 4 cores, 3 GB of RAM, and 16 GB of bootflash storage.

Q: Is the Dell KY5C4 switch still available for purchase?

A: It is primarily available now through refurbished/secondary-market resellers, as it represents an earlier generation of Dell's Z-Series platform superseded by newer models like the Z9264F-ON and Z9332F-ON.