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854194-B21
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HPE 10GbE Pass-Thru Module II
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854194-B21
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- HPE 10GbE Pass-Thru Module II
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854194-B21 Overview
854194-B21 is engineered with a robust, modular architecture that delivers high performance and scalability in demanding enterprise environments. It features flexible power options with an AC power supply supporting redundancy, advanced Ethernet ports including a mix of standard and SFP uplinks, and a stacking design that facilitates seamless network expansion.
Optimized for consistent uptime and efficient network management, this managed switch offers exceptional throughput and low latency for data-intensive applications. Its design supports critical use cases ranging from campus networks and data centers to branch offices, ensuring reliable connectivity and enhanced overall network performance.
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854194-B21 Specifications
- Product Type
- Switch
- Power Source
- AC Power Supply
- Form Factor
- Rack-mount
- Number of Ethernet Ports
- 24–48 Ports
- Number of Downlink Ports
- 24 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- Uplink Configuration
- 1G
- SFP Ports
- 4 SFP Ports
- Memory
- 256 MB
- Rack Units
- 1 RU
- Interface Ports
- 10/100/1000
- Flash Memory
- 64 MB
- Media Type Supported
- Combo
- Redundant Power Supply Supported
- Yes
- Width
- 17.5 inches
- IOS
- IP Services
- Switching Capacity
- 128 Gbps
- Height
- 1.75 inches
- POE Support
- POE+
- Depth
- 12 inches
- Layer Supported
- Layer 2
- Switching Capacity with Stacking
- 256 Gbps
- Weight
- 15 lbs
- Power Consumption
- 75 W
- Manufacturer Part Number
- 854194-B21
- Port/Expansion Slot Details
- Standard 24-port configuration with 4 SFP uplink slots
- Product Name
- 854194-B21 Enterprise-Grade Managed Switch
854194-B21 Use Case
Data Center Server Aggregation for High-Density Environments
In large-scale data centers managing hundreds of rack-mount servers, the HPE 854194-B21 10GbE Pass-Thru Module II provides direct, non-blocking 10 GbE connectivity to each server port. By eliminating switching latency and simplifying cabling, IT teams achieve predictable, low-jitter throughput for real-time analytics and database replication. Benefit: Maximizes port-to-server density, reduces network contention, and delivers sub-microsecond latency for mission-critical workloads.
Accelerated High-Performance Computing (HPC) Clusters
Research institutions and engineering firms deploying GPU-accelerated HPC clusters rely on the HPE 10GbE Pass-Thru Module II to deliver point-to-point 10 GbE links between compute nodes and storage appliances. The module’s wire-speed forwarding ensures deterministic packet delivery for MPI and RDMA traffic. Benefit: Drives parallel processing efficiency, lowers job turnaround time by up to 30 %, and maintains consistent network performance under heavy simulation loads.
Virtualization and Cloud-Ready Host Connectivity
Enterprises running VMware, Hyper-V or KVM hypervisors in converged infrastructure use the 854194-B21 pass-thru module to assign dedicated 10 GbE NICs to virtual hosts. With direct blade-to-edge-switch paths, this solution supports live migration, high-availability clustering, and multitenant segmentation without the overhead of virtual switching. Benefit: Improves VM I/O throughput by 50 %, simplifies network troubleshooting, and accelerates cloud-scale deployment with guaranteed bandwidth per tenant.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 854194-B21 |  C8R43A |  751465-B21 |  C8S45A |  Q0U59A | |
|---|---|---|---|---|---|
| Depth | 12 inches | 12 inches | 10 inches | 11 inches | 14 inches |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Flash Memory | 64 MB | 64 MB | 64 MB | 64 MB | 64 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | 1.75 inches | 1 inches | 1 inches | 1.75 inches |
| IOS | IP Services | IP Services | IP Services | IP Services | IP Services |
| Interface Ports | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Layer Supported | Layer 2 | Layer 2 / Layer 3 | Layer 2 | Layer 2 / Layer 3 | Layer 2 / Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | 854194-B21 | C8R43A | 751465-B21 | C8S45A | Q0U59A |
| Media Type Supported | Combo | Combo | Twisted Pair | Twisted Pair / Fiber / Combo | Twisted Pair / Fiber / Combo |
| Memory | 256 MB | 256 MB | 256 MB | 256 MB | 256 MB |
| Number of Downlink Ports | 24 Ports | 24 Ports | 8 Ports | 8 Ports | 24 Ports |
| Number of Ethernet Ports | 24–48 Ports | 24–48 Ports | 24–48 Ports | 12–24 Ports | 24–48 Ports |
| POE Support | POE+ | POE+ | POE+ | POE+ | POE+ |
| Port/Expansion Slot Details | Standard 24-port configuration with 4 SFP uplink slots | 24 Gigabit Ethernet ports, 4 SFP slots | 2 expansion slots available | 12 Ethernet ports with 4 SFP uplink slots | 2 expansion slots for additional modules |
| Power Consumption | 75 W | 85W | 150 W | 48 W | 120W |
| Power Source | AC Power Supply | Redundant Power Supply / AC Power Supply | AC Power Supply | Redundant Power Supply / AC Power Supply | Redundant Power Supply / AC Power Supply |
| Product Name | 854194-B21 Enterprise-Grade Managed Switch | C8R43A High-Performance Rack-Mount Switch | 751465-B21 Enterprise Rack-Mount Switch | C8S45A Advanced Enterprise Switch | Q0U59A SmartStack 9000 |
| Product Type | Switch | Switch | Switch | Switch | Switch |
| Rack Units | 1 RU | 1 RU | 1 RU | 1 RU | 1 RU |
| Redundant Power Supply Supported | Yes | Yes | Yes | Yes | Yes |
| SFP Ports | 4 SFP Ports | 4 SFP Ports | 4 SFP Ports | 4 SFP Ports | 12 SFP Ports |
| Switching Capacity | 128 Gbps | 128 Gbps | 64 Gbps | 128 Gbps | 176 Gbps |
| Switching Capacity with Stacking | 256 Gbps | 256 Gbps | 128 Gbps | 256 Gbps | 352 Gbps |
| Uplink Configuration | 1G | 10G | 1G | 1G / 10G | 10G |
| Weight | 15 lbs | 15 lbs | 15 lbs | 12 lbs | 12 lbs |
| Width | 17.5 inches | 17.5 inches | 18 inches | 17 inches | 17.5 inches |
Reviews & Ratings
M
Martin Shepard
5
Consistent Ethernet connectivity across blades.
V
Victor Downs
5
Simple and reliable blade networking.
A
Andrew Pike
4
Easy installation and stable performance.
J
Julian Wood
4
Dependable pass through option.
Questions & Answers
What is the HPE 10GbE Pass-Thru Module II (SKU: 854194-B21)?
The HPE 10GbE Pass-Thru Module II (854194-B21) is a high-performance, low-latency network interconnect that provides direct 10 GbE connectivity from HPE servers to external switches or routers.
Which HPE servers are compatible with the 854194-B21 module?
The module is certified for HPE ProLiant Gen9, Gen10 and select HPE Synergy compute modules, ensuring plug-and-play 10 GbE connectivity without additional adapters.
How many network ports does this pass-thru module provide?
The HPE 10GbE Pass-Thru Module II offers 16 copper RJ-45 10 GbE ports, delivering dedicated bandwidth and predictable performance for each server network uplink.
What cable types are supported by the HPE 10GbE Pass-Thru Module II?
It supports standard Cat6a and Cat7 copper cables up to 100 meters, enabling cost-effective, high-speed connectivity in typical data center environments.
Does the pass-thru module require additional transceivers?
No. The HPE 10GbE Pass-Thru Module II (854194-B21) uses integrated copper ports, eliminating the need for separate SFP+ or QSFP+ transceivers.
What is the maximum throughput per port?
Each port delivers up to 10 Gbps full-duplex, providing aggregate throughput of 160 Gbps across all 16 ports for high-density server deployments.
How does this module impact network latency?
By providing a direct electrical pass-through, the HPE 10GbE Pass-Thru Module II minimizes latency to under 1 µs, ideal for latency-sensitive applications.
How does the pass-thru module differ from an HPE Ethernet switch?
Unlike a switch, the pass-thru module forwards network traffic transparently without packet buffering or management overhead, reducing complexity and latency.
What is the installation process for SKU 854194-B21?
Install the module into the HPE server’s mezzanine slot, secure it with the retention bracket, and connect copper cables—no software or driver installation required.
Is management or configuration software required?
No. The module is unmanaged and plug-and-play, relying on the server’s onboard management tools (e.g., HPE iLO) for diagnostics and port status monitoring.
What is the power consumption of the HPE 10GbE Pass-Thru Module II?
The module consumes less than 10 W under full load, contributing minimal additional power draw and preserving overall data center energy efficiency.
Is the pass-thru module hot-swappable?
No. The module must be installed or removed only when the server is powered off to avoid potential hardware damage.
Which operating systems support this pass-thru module?
The module is OS-agnostic and works with any OS that supports standard 10 GbE NICs, including Windows Server, Linux distributions and VMware ESXi.
What warranty and support are provided for SKU 854194-B21?
HPE offers a one-year limited warranty with access to HPE’s global support network and optional warranty upgrades through HPE Care Packs.
What are the primary use cases for the HPE 10GbE Pass-Thru Module II?
Ideal for virtualization, high-frequency trading, and data-intensive workloads, it streamlines cabling and reduces latency in scale-out server environments.