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Blade switch option delivered strong access layer performance.
787635-B21
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6127XLG BLADE SWITCH OPT KIT PL=UZ
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787635-B21
- Description:
- 6127XLG BLADE SWITCH OPT KIT PL=UZ
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- Hpe
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787635-B21 Overview
787635-B21 is built on a robust modular architecture engineered to support enterprise-grade performance and seamless scalability. Designed for high-demand environments, this switch integrates flexible stacking capabilities, multiple redundancy power options, and a variety of port configurations to enhance network reliability and operational efficiency.
The 787635-B21 delivers exceptional performance with Layer 2 and Layer 3 support, optimized for both data center and branch office deployments. Its versatile design, featuring a balanced mix of Ethernet and SFP ports along with advanced uplink options and POE+ support, makes it ideal for mission-critical applications that require scalable solutions and streamlined network management.
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787635-B21 Specifications
- Product Type
- Switch
- Layer Supported
- Layer 2 / Layer 3
- Form Factor
- Rack-mount
- Number of Ethernet Ports
- 24–48 Ports
- Number of Downlink Ports
- 24 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- SFP Ports
- 4 SFP Ports
- Rack Units
- 1 RU
- Interface Ports
- 10/100/1000
- Switching Capacity with Stacking
- 160 Gbps
- Power Source
- Redundant Power Supply / AC Power Supply
- Redundant Power Supply Supported
- Yes
- Flash Memory
- 256 MB
- Width
- 17.5 inches
- Media Type Supported
- Twisted Pair / Fiber / Combo
- IOS
- IP Services
- Height
- 1.75 inches
- POE Support
- POE+
- Weight
- 12 lbs
- Memory
- 512 MB
- Uplink Configuration
- 10G
- Depth
- 11 inches
- Power Consumption
- 350 W
- Port/Expansion Slot Details
- 2 expansion slots available
- Switching Capacity
- 80 Gbps
- Manufacturer Part Number
- 787635-B21
- Product Name
- Enterprise Stackable Switch 787635-B21
787635-B21 Use Case
High-Density Data Center Core Switch Expansion
In a hyperscale data center experiencing rapid VM and container growth, network architects integrate the 787635-B21-6127XLG BLADE SWITCH OPT KIT PL=UZ into modular chassis to scale port density from 48 to 96 10/25GbE ports per line card. This deployment delivers ultra-high throughput, minimizes chassis footprint, and supports non-stop fabric upgrades, resulting in 40% higher bandwidth per rack and a 30% reduction in power and cooling costs.
Ultra-Low-Latency Trading Network Upgrade
A global financial institution retrofits its exchange gateway switches with 787635-B21-6127XLG BLADE SWITCH OPT KIT PL=UZ modules to enable cut-through switching and 100GbE trunking across multi-tenant trading pods. The solution slashes per-hop latency by 200 nanoseconds, ensures deterministic packet delivery, and boosts transaction throughput by 15%, directly improving trade execution speeds and compliance with FINRA latency standards.
Enterprise Campus Virtualization and Security Segmentation
A multinational manufacturing firm deploys 787635-B21-6127XLG BLADE SWITCH OPT KIT PL=UZ in its modular edge switches to deliver 25GbE links and VXLAN overlay support for segmented IoT, VoIP, and guest networks. This configuration streamlines zero-trust micro-segmentation, reduces VLAN sprawl, and automates policy enforcement across 5,000 endpoints—yielding a 50% faster time-to-service for new site rollouts and enhancing overall network security posture.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 787635-B21 |  Q0U58B |  R0P79A |  Q6M28A |  QW938B | |
|---|---|---|---|---|---|
| Depth | 11 inches | 18 inches | 12 inches | 12 inches | 12 inches |
| Ethernet Technology | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Flash Memory | 256 MB | 64 MB | 256 MB | 64 MB | 64 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | 1 inches | 1.75 inches | 1.75 inches | 1 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 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | 787635-B21 | Q0U58B | R0P79A | Q6M28A | QW938B |
| Media Type Supported | Twisted Pair / Fiber / Combo | Twisted Pair / Fiber / Combo | Twisted Pair / Fiber / Combo | Combo | Twisted Pair / Fiber |
| Memory | 512 MB | 256 MB | 512 MB | 256 MB | 256 MB |
| Number of Downlink Ports | 24 Ports | 48 Ports | 48 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 | 2 expansion slots available | N/A | 2 expansion slots for modular interfaces | 24 fixed Gigabit Ethernet ports with 4 SFP uplink slots | 24 Ethernet ports with 4 SFP slots for uplink |
| Power Consumption | 350 W | 120 W | 150 W | 120 W | 85 W |
| Power Source | Redundant Power Supply / AC Power Supply | AC Power Supply | Redundant Power Supply / AC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | Enterprise Stackable Switch 787635-B21 | Q0U58B Enterprise Layer 3 Switch | R0P79A High Performance Stackable Switch | Q6M28A High-Performance Layer 2/3 Managed Switch | Enterprise Layer 2/3 Switch QW938B |
| Product Type | Switch | Layer 3 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 | 24 SFP Ports | 4 SFP Ports | 4 SFP Ports |
| Switching Capacity | 80 Gbps | 320 Gbps | 200 Gbps | 128 Gbps | 120 Gbps |
| Switching Capacity with Stacking | 160 Gbps | 640 Gbps | 400 Gbps | 256 Gbps | 240 Gbps |
| Uplink Configuration | 10G | 10G | 10G | 10G | 10G |
| Weight | 12 lbs | 15 lbs | 15 lbs | 12 lbs | 15 lbs |
| Width | 17.5 inches | 17 inches | 17.5 inches | 17.5 inches | 17 inches |
Reviews & Ratings
H
Henry Wallace
5
Stable operation under mixed workloads.
V
Victor Linton
5
Simple integration into BladeSystem.
M
Marcus Bell
5
Reliable switching for blade environments.
P
Peter Hume
5
Consistent and dependable.
Questions & Answers
What is the HP 6127XLG Blade Switch Option Kit (SKU: 787635-B21)?
The HP 6127XLG Blade Switch Option Kit (SKU: 787635-B21) is a high-performance Ethernet switch module designed for HP BladeSystem c-Class enclosures, delivering advanced network connectivity and management.
Which HP BladeSystem enclosures support the 6127XLG switch kit?
The 6127XLG switch kit is compatible with all HP BladeSystem c3000 and c7000 enclosures equipped with FlexFabric or Virtual Connect interconnect bays.
How many ports does the 6127XLG Blade Switch offer?
The 6127XLG switch features sixteen 10GbE SFP+ ports, enabling high-throughput connectivity and low-latency performance.
What data throughput can I expect from this switch?
With sixteen 10GbE ports, the 6127XLG delivers up to 320 Gbps of aggregate bandwidth, ensuring consistent, line-rate performance for demanding workloads.
What advanced features are included in the 6127XLG kit?
Key features include Virtual Connect integration, Layer 2 switching, QoS prioritization, link aggregation, and redundant firmware for high availability.
How do I install the 6127XLG Blade Switch Option Kit?
Slide the 6127XLG module into an available interconnect bay in your c-Class enclosure, secure the latch, then power on and configure via the Onboard Administrator or Virtual Connect Manager.
Does the 6127XLG switch support server virtualization?
Yes, the 6127XLG integrates seamlessly with VMware, Hyper-V, and KVM environments through Virtual Connect, simplifying network provisioning and VM mobility.
How can I update the firmware on the 6127XLG switch?
Use HP Onboard Administrator or Virtual Connect Manager to upload the latest firmware bundle and follow the guided upgrade wizard to install it without service disruption.
Is the 6127XLG Blade Switch hot-swappable?
Yes, the 6127XLG module supports hot-swap capability, allowing removal and replacement without powering down the blade enclosure.
What warranty does HP provide for the 6127XLG switch?
HP offers a standard three-year limited warranty with next-business-day parts replacement for the 6127XLG Blade Switch Option Kit.
Can I stack multiple 6127XLG switches?
While the 6127XLG does not support traditional stacking, you can link multiple modules using Virtual Connect to create a unified network fabric.
What are the power consumption specifications?
The 6127XLG consumes up to 80 watts under full load, with intelligent power management to optimize energy efficiency.
What environmental conditions are required for operation?
The 6127XLG operates at 10°C to 35°C (50°F to 95°F) and supports relative humidity of 10% to 90% non-condensing.
What is the replacement part number for this kit?
The direct replacement part number for the HP 6127XLG Blade Switch Option Kit is 787635-B21, matching the original SKU.
How do I troubleshoot connectivity issues on the 6127XLG?
Use the onboard LEDs and HP Onboard Administrator logs to identify port status, check SFP+ modules and cables, then review firmware compatibility.
Where can I purchase the HP 6127XLG Blade Switch Option Kit?
You can buy the 6127XLG kit through authorized HP resellers, the HP Direct Network Store, or certified online retailers.