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Derek Lawson
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SFP+ module delivered stable uplinks.
J9731A
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HP HP ARUBA 2920 2-PORT 10GBE SFP+ EXPANSION MODULE
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J9731A
- Description:
- HP HP ARUBA 2920 2-PORT 10GBE SFP+ EXPANSION MODULE
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J9731A Overview
J9731A is a high-performance, rack-mount managed switch engineered with a modular architecture that supports both Layer 2 and Layer 3 functions, making it ideal for enterprise-grade network environments. It is built with a robust design that emphasizes reliability and scalability, featuring a secure stacking capability and a flexible power supply option that meets demanding uptime requirements.
J9731A offers versatile connectivity with a mix of 10/100/1000 Ethernet ports and uplink options that include 10G configurations, enabling seamless data center integration. Its high switching capacity, efficient performance, and power over Ethernet (POE+) support make it well-suited for use cases ranging from small businesses to large organizations requiring advanced network management and scalability.
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Request bulk order quote for J9731A for additional pricing. Browse the full Aruba 2920 Series Switches series or explore all Hpe products.
J9731A Specifications
- Product Type
- Switch
- Power Source
- AC Power Supply
- Form Factor
- Rack-mount
- Number of Ethernet Ports
- 24–48 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- IOS
- LAN Base
- SFP Ports
- 4 SFP Ports
- Memory
- 256 MB
- Rack Units
- 1 RU
- Interface Ports
- 10/100/1000
- Flash Memory
- 64 MB
- Layer Supported
- Layer 3
- Media Type Supported
- Combo
- Redundant Power Supply Supported
- Yes
- Switching Capacity
- 128 Gbps
- Height
- 1.75 inches
- POE Support
- POE+
- Weight
- 12 lbs
- Uplink Configuration
- 10G
- Switching Capacity with Stacking
- 256 Gbps
- Depth
- 11 inches
- Number of Downlink Ports
- 16 Ports
- Width
- 17 inches
- Power Consumption
- 85 W
- Port/Expansion Slot Details
- 24 x 10/100/1000 Ethernet ports, 4 x 10G SFP+ uplink ports
- Manufacturer Part Number
- J9731A
- Product Name
- J9731A Unified Managed Switch
J9731A Use Case
High-Density Server Farm Uplink Acceleration
In an enterprise data center hosting dozens of hyperconverged servers, IT architects integrate the J9731A-HP HP Aruba 2920 2-Port 10GbE SFP+ Expansion Module to deliver dedicated 10GbE fiber uplinks for each rack. By offloading multiple 1GbE trunks into two 10GbE SFP+ ports, the solution minimizes network bottlenecks, reduces east-west traffic latency by up to 50%, and ensures non-blocking throughput for high-performance compute workloads. Benefit: Dramatically faster inter-server transfers, optimized VM-to-storage I/O, and scalable growth without forklift upgrades.
Virtualization Cluster Bandwidth Scaling
A large financial services firm implements a VMware ESXi cluster requiring robust vMotion and backup performance. They deploy the J9731A-HP HP Aruba 2920 2-Port 10GbE SFP+ Expansion Module on each top-of-rack switch, connecting directly to dual-port 10GbE NICs in hypervisor hosts. This architecture delivers symmetrical high-speed links for seamless live migrations, rapid snapshot replication, and real-time data analytics. Benefit: Up to 4× faster VM migrations and 30% lower backup windows, driving higher service availability and compliance with SLAs.
Campus Backbone Resilience and Future-Proofing
A university IT team upgrades its distributed campus network to support growing research data and IoT initiatives. By equipping key Aruba 2920 switches with the J9731A-HP expansion module, they establish redundant 10GbE SFP+ trunks between building cores and the central spine. This deployment offers hitless failover, 40 Gbps aggregated bandwidth, and seamless support for DWDM fiber uplinks across 10 km. Benefit: Enhanced network resiliency, simplified maintenance with hot-swappable modules, and a clear path to 25/40 GbE upgrades as campus demand scales.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| J9731A |  J9728A |  J9805A |  J9726A |  J9727A | |
|---|---|---|---|---|---|
| Depth | 11 inches | 15 inches | 12 inches | N/A | 10 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 | 1.75 inches | N/A | 1.75 inches |
| IOS | LAN Base | IP Services | LAN Base | IP Services | IP Services |
| Interface Ports | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Layer Supported | Layer 3 | Layer 2 / Layer 3 | Layer 2 | Layer 2 / Layer 3 | Layer 2 / Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | J9731A | J9728A | J9805A | J9726A | J9727A |
| Media Type Supported | Combo | Twisted Pair / Fiber | Twisted Pair | Twisted Pair / Fiber / Combo | Combo |
| Memory | 256 MB | 256 MB | 256 MB | 256 MB | 256 MB |
| Number of Downlink Ports | 16 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, 4 x 10G SFP+ uplink ports | 4 modular expansion slots | N/A | N/A | N/A |
| Power Consumption | 85 W | 150 W | N/A | N/A | 250 W |
| Power Source | AC Power Supply | Redundant Power Supply / AC Power Supply | AC Power Supply | Redundant Power Supply / AC Power Supply | AC Power Supply |
| Product Name | J9731A Unified Managed Switch | J9728A High-Performance Stacking Switch | J9805A Gigabit Switch | J9726A Network Switch | J9727A 24-Port Stackable Managed Gigabit 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 | No | 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 | N/A | 128 Gbps |
| Switching Capacity with Stacking | 256 Gbps | 256 Gbps | 256 Gbps | N/A | 256 Gbps |
| Uplink Configuration | 10G | 1G / 10G | 1G | 1G / 10G / 40G | 10G |
| Weight | 12 lbs | 18 lbs | 15 lbs | N/A | 10 lbs |
| Width | 17 inches | 17.5 inches | 17.5 inches | N/A | 17 inches |
Reviews & Ratings
N
Noman Ashfaq
5
Good fiber performance.
P
Pavel Novak
5
Plug-and-play experience.
A
Adeel Nawaz
5
Reliable expansion option.
C
Chris Morgan
4
Met expectations.
Questions & Answers
What is the HP Aruba 2920 2-Port 10GbE SFP+ Expansion Module (SKU J9731A)?
The J9731A is a field-installable expansion module that adds two 10 Gigabit Ethernet SFP+ uplink ports to Aruba 2920 switches, enabling high-speed fiber or DAC connectivity for data center and campus networks.
Which Aruba 2920 switch models are compatible with the J9731A module?
The J9731A module is fully compatible with all Aruba 2920 Series switches, including 24-port and 48-port non-PoE, PoE+, and PoE++ variants running AOS-SI firmware.
What types of SFP+ transceivers and DAC cables are supported?
This module supports standard 10GbE SFP+ optics (SR, LR, ER) and Aruba-qualified direct attach copper (DAC) cables, allowing distances from 1 m (DAC) up to 40 km (single-mode LR/ER optics).
How do I install the J9731A expansion module in my switch?
Power off the switch, remove the blank cover from the SFP+ slot, slide the J9731A into the slot until it clicks, secure the captive screws, then power on the switch. The module is recognized automatically by ArubaOS.
Is the J9731A expansion module hot-swappable?
Yes. The J9731A module supports hot-swap on Aruba 2920 switches, allowing you to install or replace it without powering down your network.
What maximum throughput does each port deliver?
Each SFP+ port delivers up to 10 Gbps of bidirectional throughput, supporting full-duplex operation for server uplinks, stacking, or data center interconnects.
What is the power consumption of the expansion module?
The J9731A expansion module consumes approximately 3 W under typical load conditions and falls within the Aruba 2920’s overall power budget without requiring additional power supplies.
Does the J9731A fall under Aruba’s standard warranty and support?
Yes. The module is covered by Aruba’s limited lifetime warranty when installed in Aruba switches and is eligible for optional ArubaCare support and software assurance.
What are common use cases for the 10GbE SFP+ expansion module?
Common use cases include high-speed server uplinks, data center spine connections, campus core aggregation, and stacking multiple 2920 switches for greater bandwidth and redundancy.
Can I mix different SFP+ optics or DACs in the two ports?
Yes. The two SFP+ slots operate independently, allowing mixed use of multi-mode, single-mode optics, or DAC cables as long as they are Aruba-qualified 10GbE modules.
How many SFP+ modules can I install in a single switch?
Each Aruba 2920 switch supports one J9731A module, providing exactly two SFP+ ports per switch for 10 GbE expansion.
What connectivity distances can I achieve with this module?
With multi-mode optics, you can reach up to 300 m; with single-mode LR optics up to 10 km; and with ER optics up to 40 km, depending on cable quality and transceiver type.
Does the module support speed auto-negotiation on the SFP+ ports?
No. SFP+ ports on the J9731A operate at a fixed 10 Gbps rate. They do not auto-negotiate to lower speeds such as 1 Gbps.
How does adding the J9731A module improve network scalability?
By providing dual 10 GbE uplinks, the module increases aggregate bandwidth, reduces uplink bottlenecks, and enables smooth network growth without replacing the entire switch.
Are ArubaCare support and software updates required for the expansion module?
While optional, ArubaCare provides extended hardware replacement, firmware updates, and direct support, ensuring continuous performance and security for your J9731A module.
Where can I purchase the HP Aruba 2920 2-Port 10GbE SFP+ Expansion Module?
You can buy the J9731A module from authorized Aruba/HPE resellers, the official HPE Store, or certified channel partners. Always verify SKU J9731A for genuine Aruba hardware.