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Pass through module delivered consistent 10Gb Ethernet connectivity.
538113-B21
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HP BLc 10GbE Pass Thru Mod Opt Kit
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538113-B21
- Description:
- HP BLc 10GbE Pass Thru Mod Opt Kit
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538113-B21 Overview
538113-B21 is a high-performance, rack-mount network switch engineered with a modular architecture that supports robust stacking and seamless scalability. It is designed to deliver consistent, reliable performance in demanding enterprise environments using a mix of AC power options with built-in redundancy, a wide array of port configurations, and industry-leading switching capabilities.
This switch integrates 10/100/1000 Ethernet interfaces with dedicated SFP uplink ports, enabling dynamic connectivity for applications ranging from campus networking to data center access. Its stacking support and optimized performance make it ideal for deployments requiring scalable bandwidth, low latency, and flexible power management tailored to modern network use cases.
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538113-B21 Specifications
- Product Type
- Switch
- Form Factor
- Rack-mount
- Number of Ethernet Ports
- 24–48 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- Uplink Configuration
- 1G
- IOS
- LAN Base
- SFP Ports
- 4 SFP Ports
- Memory
- 256 MB
- Rack Units
- 1 RU
- Interface Ports
- 10/100/1000
- Flash Memory
- 64 MB
- Height
- 1.73 inches
- Power Source
- Redundant Power Supply / AC Power Supply
- Number of Downlink Ports
- 48 Ports
- Redundant Power Supply Supported
- Yes
- Port/Expansion Slot Details
- N/A
- Width
- 17.5 inches
- Media Type Supported
- Twisted Pair / Fiber / Combo
- Switching Capacity
- 128 Gbps
- POE Support
- POE+
- Depth
- 11.5 inches
- Layer Supported
- Layer 2
- Power Consumption
- N/A
- Switching Capacity with Stacking
- 256 Gbps
- Weight
- 16 lbs
- Manufacturer Part Number
- 538113-B21
- Product Name
- Cisco Catalyst 2960-X 48-Port POE+ Switch
538113-B21 Use Case
High-Density Virtualized Infrastructure with 538113-B21 HP BLc 10GbE Pass Thru Mod Opt Kit
In large-scale VMware and Hyper-V blade clusters, the 538113-B21 HP BLc 10GbE Pass Thru Mod Opt Kit provides wire-speed 10GbE connectivity directly to each virtual host. Benefit: Eliminates software switching overhead, reduces network latency by up to 30%, and boosts VM density for mission-critical applications.
Accelerated Data Protection & DR Replication over 10GbE with HP 538113-B21 Pass-Thru Module
During data center consolidation and disaster recovery deployments, the 538113-B21 HP BLc 10GbE Pass Thru Mod Opt Kit enables dedicated 10GbE links for backup appliances and replication servers. Benefit: Achieves up to 50% faster nightly backups, lowers RPO/RTO, and strengthens business continuity without adding switch latency.
Low-Latency HPC & Analytics Fabric Using 538113-B21 HP BLc 10GbE Pass-Thru Module
In high-performance computing and big data analytics clusters, the HP 538113-B21 Pass Thru Mod Opt Kit delivers direct, wire-speed 10GbE for MPI and RDMA traffic between compute blades. Benefit: Cuts inter-node latency by 20%, accelerates job throughput, and maximizes processing efficiency for AI, machine learning, and scientific simulations.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 538113-B21 |  C8R45B |  R0P82A |  BK763A |  834978-B22 | |
|---|---|---|---|---|---|
| Depth | 11.5 inches | 14 inches | 12 inches | 12 inches | 18 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 | 256 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.73 inches | 1 inches | 1.75 inches | 1.75 inches | 1 inches |
| IOS | LAN Base | IP Services | LAN Base | LAN Base | 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 3 | Layer 2 / Layer 3 | Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | 538113-B21 | C8R45B | R0P82A | BK763A | 834978-B22 |
| Media Type Supported | Twisted Pair / Fiber / Combo | Twisted Pair / Fiber / Combo | Combo | Combo | Combo |
| Memory | 256 MB | 256 MB | 256 MB | 256 MB | 512 MB |
| Number of Downlink Ports | 48 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 | N/A | 4 fixed SFP slots and 24 fixed Ethernet ports | 24 Ethernet ports, 4 SFP uplink slots | 24 Ethernet ports with 4 SFP uplink slots | 2 expansion slots |
| Power Consumption | N/A | N/A | 250 W | 85W | N/A |
| Power Source | Redundant Power Supply / AC Power Supply | AC Power Supply with Redundancy | Redundant Power Supply / AC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | Cisco Catalyst 2960-X 48-Port POE+ Switch | C8R45B Business-Class Managed Switch | R0P82A High Performance Switch | BK763A High-Performance Enterprise Switch | 834978-B22 High-Performance Enterprise 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 | 128 Gbps | 128 Gbps |
| Switching Capacity with Stacking | 256 Gbps | 256 Gbps | 256 Gbps | 256 Gbps | 256 Gbps |
| Uplink Configuration | 1G | 10G | 1G / 10G | 10G | 10G |
| Weight | 16 lbs | 8 lbs | 15 lbs | 12 lbs | 10 lbs |
| Width | 17.5 inches | 17 inches | 17.5 inches | 17.5 inches | 17.5 inches |
Reviews & Ratings
I
Ian Woolf
5
Easy integration into BladeSystem enclosure.
V
Victor Palmer
5
Reliable for simple blade networking needs.
N
Neil Carter
5
No configuration issues during deployment.
P
Peter Holloway
5
Predictable performance and stability.
Questions & Answers
What is the HP BLc 10GbE Pass Thru Module Optional Kit (SKU 538113-B21)?
The HP BLc 10GbE Pass Thru Module Optional Kit (538113-B21) is a mezzanine network module for HP BladeSystem c-Class that delivers direct 10GbE connectivity from blade servers to external switches without internal switching.
How many 10GbE ports does the 538113-B21 module provide?
The module provides sixteen external SFP+ 10GbE ports, enabling direct Ethernet connections for up to eight dual-port mezzanine adapters.
Which HP chassis is the BLc 10GbE Pass Thru Module compatible with?
It is compatible with HP BladeSystem c7000 and c3000 enclosures that support full-height or half-height blade server slots.
Do I need an external switch to use the 10GbE pass-thru module?
Yes. This pass-thru module requires external Ethernet switches or routers to manage and switch network traffic because it offers no internal switching functions.
Can I mix this module with HP Virtual Connect modules?
Yes. You can install the pass-thru module alongside HP Virtual Connect modules in different interconnect bays, but each bay can host only one module type.
How do I install the 538113-B21 pass-thru module?
Slide the module into a supported interconnect bay in the c-Class chassis until it clicks, then connect SFP+ cables to your external switches and power on the enclosure.
What cable types are supported by the HP BLc 10GbE Pass Thru Module?
The module supports standard SFP+ fiber transceivers (SR, LR) and direct-attach copper (DAC) cables for distances up to 10 meters.
What is the maximum throughput per port?
Each SFP+ port supports full-duplex 10 Gbps throughput, delivering up to 20 Gbps aggregate traffic per port.
Is the pass-thru module hot-swappable?
No. HP does not support hot-swapping of interconnect modules; you must power down affected blades or the entire enclosure before removal or insertion.
Which operating systems are supported with the 10GbE pass-thru module?
Any OS supported on HP blade servers that includes 10GbE SFP+ driver support, such as Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server and VMware ESXi.
Where can I download firmware updates and drivers?
Firmware and driver packages are available on the HPE Support Center website under the product’s download section for SKU 538113-B21.
What troubleshooting steps address port link issues?
Verify SFP+ module seating, replace faulty transceivers or DAC cables, confirm correct interconnect bay mapping in Onboard Administrator, and update firmware to the latest version.
What is the warranty for the HP BLc 10GbE Pass Thru Module?
HP provides a one-year limited hardware warranty with worldwide parts exchange; extended support options are available via HPE Care Packs.
How does the pass-thru module differ from an integrated switch module?
Unlike switch modules, the pass-thru module simply forwards each server’s NIC signals directly to external ports without VLAN, QoS or packet buffering.
What power does the 538113-B21 module consume?
The module consumes approximately 25 watts under full load; ensure adequate chassis power and cooling capacity when planning deployments.
Can I monitor port status and performance?
Port link status and basic diagnostics are viewable through the HP Onboard Administrator, but detailed statistics require external switch management tools.