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Switch kit performed reliably with both 1Gb and 10Gb connections.
658250-B21
HP 6125G/XG BLADE SWITCH OPT KIT
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658250-B21
HP 6125G/XG BLADE SWITCH OPT KIT
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658250-B21 is a robust, high-performance network switch engineered for scalable enterprise applications. It features a versatile architecture that supports both Layer 2 and Layer 3 operations, with flexible power options including standard AC power supply and redundant configurations to meet mission-critical uptime requirements.
This switch delivers a comprehensive port design with 24 Ethernet ports complemented by 4 SFP uplink slots, enabling efficient stacking and outstanding throughput performance. Ideal for campus networks, data center aggregation, and other demanding environments, 658250-B21 offers exceptional scalability, reliability, and high-speed connectivity.
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Request bulk order quote for 658250-B21 for additional pricing. Browse the full Hpe Storage Network Switches series or explore all Hpe products.
In a large enterprise data center running VMware vSphere and Microsoft Hyper-V, integrating the 658250-B21-HP 6125G/XG Blade Switch Option Kit into HP c-Class blade chassis consolidates multiple 10/25/40 GbE uplinks into a unified fabric. The result: 40% higher aggregate throughput, 30% lower east-west VM latency, and centralized provisioning via HP OneView, driving faster VM deployments and streamlined operations.
A scientific research facility deploying GPU-accelerated simulation workloads upgrades its HP BladeSystem with the 658250-B21-HP 6125G/XG Blade Switch Option Kit to deliver 10/40 GbE connectivity optimized for MPI traffic. This low-latency interconnect achieves sub-microsecond hop times and 200 Gbps bisection bandwidth, reducing job runtimes by 35% and accelerating time-to-insight for compute-intensive projects.
A multi-campus university must support thousands of IoT sensors, 4K lecture streams, and VoIP endpoints with minimal downtime. By deploying the 658250-B21-HP 6125G/XG Blade Switch Option Kit as the campus core in HP blade chassis, the IT team achieves modular 10/25/40 GbE expansion, 99.99% network availability, and 20% lower CapEx through port consolidation, ensuring seamless connectivity and easy segmentation.
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 658250-B21 |  R0P81A |  Q6M28A |  C8R42A |  QK754C | |
|---|---|---|---|---|---|
| Depth | 11 inches | 12 inches | 12 inches | 11 inches | 12 in |
| 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 | 1.75 inches | 1 inch | 1.75 in |
| 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 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 | Layer 2 / Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | 658250-B21 | R0P81A | Q6M28A | C8R42A | QK754C |
| Media Type Supported | Combo | Combo | Combo | Combo | Combo |
| Memory | 256 MB | 256 MB | 256 MB | 256 MB | 512 MB |
| Number of Downlink Ports | 24 Ports | 24 Ports | 24 Ports | 24 Ports | 24 Ports |
| Number of Ethernet Ports | 24–48 Ports | 24–48 Ports | 24–48 Ports | 24–48 Ports | 24–48 Ports |
| POE Support | POE+ | POE+ | POE+ | POE+ | POE+ |
| Port/Expansion Slot Details | 24 x 10/100/1000 Ethernet ports with 4 SFP uplink slots | 24 fixed Ethernet ports and 4 dedicated SFP uplink slots | 24 fixed Gigabit Ethernet ports with 4 SFP uplink slots | 24 Ethernet ports with 4 SFP uplink slots | 4 x 10G SFP+ uplink slots, 24 x 10/100/1000 Ethernet ports |
| Power Consumption | 75 W | 65 W | 120 W | 35 W | N/A |
| Power Source | AC Power Supply | Redundant Power Supply | AC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | Enterprise Stackable Managed Switch 658250-B21 | R0P81A High-Performance Stackable Switch | Q6M28A High-Performance Layer 2/3 Managed Switch | C8R42A Advanced Managed Switch | QK754C Enterprise Stackable Switch |
| 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 | 4 SFP Ports |
| Switching Capacity | 128 Gbps | 128 Gbps | 128 Gbps | 256 Gbps | 128 Gbps |
| Switching Capacity with Stacking | 256 Gbps | 256 Gbps | 256 Gbps | 512 Gbps | 256 Gbps |
| Uplink Configuration | 10G | 10G | 10G | 10G | 10G |
| Weight | 15 lbs | 15 lbs | 12 lbs | 12 lbs | 6 lbs |
| Width | 17.5 inches | 17.5 inches | 17.5 inches | 17.6 inches | 17.5 in |
Switch kit performed reliably with both 1Gb and 10Gb connections.
Straightforward deployment in our BladeSystem.
Consistent throughput across blades.
Good balance of performance and usability.
Dependable blade switching solution.
The HP 6125G/XG Blade Switch Option Kit (658250-B21) is a modular network switch designed for HP ProLiant BL blade servers, offering fixed 10GbE and Gigabit Ethernet ports to optimize data center connectivity.
The HP 6125G/XG switch is compatible with HP BladeSystem c-Class enclosures, including c7000 and c3000 chassis loaded with ProLiant BL servers.
The switch delivers eight fixed 10GbE X2 uplink ports plus sixteen fixed 1GbE RJ-45 downlink ports, enabling high-throughput connectivity for blade servers.
Yes, the X2 uplink ports support multimode and single-mode fiber transceivers, while the RJ-45 downlinks support standard copper Ethernet connections.