HPE R9Y04A#ABA 48-Port Gigabit PoE+ Switch with 4SFP+ Uplinks

Overview

The HPE Aruba CX 6100 48G C4 4SFP+ 740W SW — part number R9Y04A#ABA — is a rack-mountable Layer 2 Gigabit Ethernet switch engineered for enterprise access-layer deployments where you need maximum PoE headroom and fiber uplink flexibility under one roof. With 48 copper ports running 10/100/1000Base-T and a 740W PoE+ power budget, this switch is sized for dense IP camera floors, open-office Wi-Fi 6 rollouts, and VoIP-heavy branch offices where half-powered budget switches fall short. The compact form factor mounts in a standard rack and draws only ~50W for the switch itself — virtually all of that 740W goes to your connected devices.

This is an HPE Networking (formerly Aruba) CX 6100 family switch. Browse the full HPE networking catalog to compare models and find the right fit for your deployment scale.

Port Configuration and Throughput

• 48 × 10/100/1000Base-T copper ports: Full wire-speed Gigabit on every access port means you won't create an artificial bottleneck in front of 1Gbps IP cameras or 802.11ax APs that push real throughput. No half-speed compromise ports.
• 4 × SFP+ uplink slots: 10 Gigabit fiber or DAC uplinks to your distribution layer. Four uplinks give you room for two active, two standby — or LAG bonding for aggregate bandwidth when the access tier genuinely saturates a single 10G link.
• Layer 2 switching: VLAN segmentation, spanning tree, and link aggregation are handled natively. If you need inter-VLAN routing at the access layer, size up to a Layer 3 model; for straightforward access-tier builds this is the right scope.

PoE Delivery

• 740W total PoE budget, IEEE 802.3at Class 4: At 30W per port (802.3at maximum), this switch can simultaneously power roughly 24 full-draw PoE+ devices — enough for an entire floor of PTZ cameras or tri-radio APs without load-shedding. Most IP cameras pull 12–18W, meaning you can realistically power all 48 ports at typical camera loads. That headroom matters when you scale from a 20-camera to a 40-camera footprint mid-project.
• PoE+ (802.3at) compliance: Covers virtually all commercial IP cameras, VoIP phones, Wi-Fi 6 APs, and access control readers currently shipping. If you need 802.3bt (PoE++) for multi-radio APs or high-wattage pan-tilt cameras, check the device's draw spec before committing — 802.3at tops out at 30W per port.

Management and Monitoring

• Compact, rack-mountable form factor: Installs in a standard 1U rack bay. The low 49.7W self-consumption means minimal heat contribution in already-warm IDF closets — one less variable when you're planning airflow for a dense rack.
• CX software platform: The Aruba CX OS supports REST API management, ArubaOS-CX CLI, and integration with Aruba Central for cloud-based monitoring and zero-touch provisioning — useful if you manage distributed sites and want a single pane of glass rather than per-switch SSH sessions.

Integration and Compatibility

The R9Y04A#ABA fits natively into Aruba-managed network architectures. Aruba Central cloud management supports bulk provisioning across dozens of sites, making this switch viable for multi-branch rollouts where on-site configuration time is a cost driver. For PoE network switches in surveillance deployments, the 740W budget pairs well with 24–48 port IP camera builds; pair it with a PoE planning guide to confirm device draw totals before finalizing your order.

The four SFP+ uplink slots accept standard 10GbE SFP+ transceivers (SR, LR) or passive/active DAC cables — consult the HPE transceiver compatibility matrix for validated optic part numbers. For fiber runs between IDF and MDF, direct-attach copper (DAC) keeps cost low at distances under 7m; single-mode LC for anything longer.

This switch supports twisted-pair and optical fiber media simultaneously across its port stack, which simplifies mixed-media buildings where some runs are Cat6A and others terminate in fiber. Pairing with a commercial PoE switch selection guide can help validate budget allocation across your entire camera or AP fleet before procurement.

For deployments integrating IP cameras, this switch pairs cleanly with dedicated IP camera systems and downstream network video recorders — the 740W budget gives enough margin to avoid per-port power negotiation issues that plague under-spec'd switches in 24/7 recording environments.

Frequently Asked Questions

Q: What is the total PoE power budget on the R9Y04A#ABA?

A: The R9Y04A#ABA provides a 740W PoE power budget across its 48 copper ports, compliant with IEEE 802.3at (PoE+). At 30W per port maximum, you can run approximately 24 full-draw PoE+ devices simultaneously, or all 48 ports at typical 12–15W camera/AP loads.

Q: Does the HPE CX 6100 R9Y04A#ABA support 10 Gigabit uplinks?

A: Yes. The switch includes 4 SFP+ expansion slots, each supporting 10 Gigabit Ethernet via compatible SFP+ transceivers or DAC cables. These uplinks connect to your distribution or core layer at 10Gbps.

Q: What is the warranty on the HPE R9Y04A#ABA?

A: HPE provides a lifetime warranty on this CX 6100 switch.

Q: Is this switch managed or unmanaged?

A: The R9Y04A#ABA runs ArubaOS-CX software, making it a fully managed Layer 2 switch. It supports CLI management, REST API, and integration with Aruba Central for cloud-based administration.

Q: Can the HPE CX 6100 R9Y04A#ABA power IP cameras and Wi-Fi 6 access points simultaneously?

A: Yes. The 740W PoE+ budget supports mixed PoE device deployments. Most commercial IP cameras draw 10–18W and 802.11ax APs typically draw 20–25W — the 740W budget accommodates a mix of both across the 48 ports without requiring per-port power rationing in typical deployments.

Q: Does the R9Y04A#ABA support PoE++ (802.3bt)?

A: No. This switch is rated for IEEE 802.3at (PoE+), which delivers up to 30W per port. If your devices require 802.3bt (PoE++, up to 60W or 90W per port), you will need a higher-spec switch in the HPE CX lineup.

James Everett

The R9Y04A#ABA is the switch I reach for when a customer's camera or AP count is headed toward 40+ endpoints and a 370W budget switch is going to cause grief at month three. The 740W PoE+ pool is the defining spec here — it's not marketing headroom, it's real capacity that keeps you from renegotiating power allocation every time a PTZ or tri-radio AP goes in.

Technical Highlights:

• 740W PoE budget: Enough to simultaneously run 48 ports at ~15W average — a real-world mix of IP cameras and 802.11ax APs — with margin left for burst events like PTZ positioning draws.
• 4 × SFP+ uplinks: Bond two 10G ports via LAG for 20Gbps aggregate to your distribution layer, keeping uplinks from becoming the bottleneck when the access tier is fully loaded with 1Gbps devices.
• 49.7W switch self-consumption: Unusually low for a 48-port PoE+ switch — virtually the entire 740W allocation goes to endpoints, not switch overhead. That matters when you're calculating UPS runtime or PDU capacity in a dense IDF.

Deployment Considerations:

• This is a Layer 2 switch — no inter-VLAN routing on-box. If your design has cameras and management traffic on separate VLANs that need to talk at the access tier, you need a Layer 3 upstream device or a different switch model.
• 802.3at caps at 30W per port maximum. Confirm your high-draw devices (multi-radio APs, outdoor PTZ cameras with heaters) don't exceed that — 802.3bt devices will negotiate down and may underperform or fail to power.

Best fit: branch office or IDF closet builds running 30–48 IP cameras or Wi-Fi 6 APs where the priority is maximizing powered endpoints per rack unit without a separate PoE injector or midspan — the 740W budget handles the full port count at camera-typical loads without compromise.