What port configuration and speeds does HPE R3B05A support?

Features 32 QSFP28 ports supporting 100GbE natively, with breakout to 4x25GbE or 4x10GbE per port. Compatible with 10, 25, 40, 50, 100Gbe transceivers, delivering flexible high-density connectivity for spine/leaf architectures in data centers.

Does the SN2745M support ONIE and third-party NOS?

Yes, fully ONIE-compatible for installing open network operating systems like Cumulus Linux, SONiC, or others. Enables disaggregation from vendor lock-in, ideal for cloud providers seeking cost-effective, standardized management across multi-vendor fabrics.

What power and airflow design is used in R3B05A?

DC power input optimized for colocation facilities, with power-to-connector (P2C) airflow directing cool air from front to back. Supports redundant power options in some configs, ensuring high availability in mission-critical deployments.

What performance guarantees does this switch provide?

Provides line-rate switching across all 32 ports for any packet size with zero packet loss. Enhanced deep buffers manage microbursts in east-west traffic, low latency suits AI/HPC workloads requiring predictable throughput.

Is the HPE SN2745M suitable for hyperscale data centers?

Yes, 1U rack-mountable with high port density, DC power, and ONIE support aligns with hyperscale requirements. TAA-compliant variant available for government deployments, scales to large fabrics via stacking and uplinks.

What management interfaces are available?

Includes console management port, USB port for OS loading, and stacking ports. Supports standard Ethernet management, enabling out-of-band control and rapid provisioning in automated data center environments.

R3B05A - HPE R3B05A SN2745M 32x100G QSFP28 ONIE DC Switch

Name: HPE R3B05A SN2745M 32x100G QSFP28 ONIE DC Switch
Brand: HPE
SKU: R3B05A
Price: 4512 USD
Availability: InStock

R3B05A - HPE R3B05A SN2745M 32x100G QSFP28 ONIE DC Switch | US IT Hardware

Product overview

The HPE SN2745M (R3B05A) is a top-of-rack or spine switch from the M-series portfolio, optimized for modern data center environments requiring ultra-high bandwidth. It features 32 QSFP28 ports supporting flexible speeds of 10, 25, 40, 50, and 100GbE, enabling breakout configurations for cost-effective scaling. ONIE (Open Network Install Environment) allows installation of third-party NOS like Cumulus Linux or SONiC, providing vendor flexibility. With DC power input and power-to-connector (P2C) airflow, it suits high-density deployments in colocation or enterprise data centers. Delivers predictable line-rate performance across all ports and packet sizes with zero packet loss, enhanced buffer management for bursty traffic, and low latency for east-west server interconnects. Rack-mountable 1U form factor includes management ports (console, USB), stacking capability, and RoHS compliance. Ideal for hyperscale cloud, AI/ML training clusters, and storage fabrics demanding non-blocking 100G throughput.

32 QSFP28 ports support 10/25/40/50/100GbE speeds.
ONIE compatible for open network OS installation.
DC power with P2C airflow for data center efficiency.
Line-rate performance with zero packet loss all ports.
Rack-mountable 1U form factor with management ports.
Enhanced buffers handle bursty east-west traffic flows.

Expedited and overnight shipping options are available at checkout, priced by destination and service.
Purchase orders accepted from qualified institutions.
Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Manufacturer part #	R3B05A
Brand	HPE
Condition	New
Stacking	Yes
Compliance	RoHS, WEEE, TAA
Manageable	Yes, Layer 2/3
Eco Friendly	Yes
ONIE Support	Yes
Product Line	M-series SN2745M

Network & Communication

Speed Support

Compatible systems

Optimized for HPE server ecosystems; ONIE extends to broad open networking hardware.

HPE ProLiant
Model: DL380
Form factor: 2U Rack
Generation: Gen10/11
Direct attach via QSFP28 for server uplinks.
HPE Synergy
Model: Any
Form factor: Composable
Fabric interconnect potential.

Best for

Data Center Spine
High-bandwidth aggregation layer connecting leaf switches with 100GbE uplinks for non-blocking traffic.
Leaf/ToR
Server access layer with breakout to 25/50GbE for dense compute/storage connectivity.
Cloud Networking
ONIE-enabled for open NOS in multi-tenant cloud environments requiring flexibility.
AI/ML Training
Ultra-low latency 100G fabric for GPU clusters handling massive dataset transfers.
HPC Clusters
Line-rate performance supports parallel computing workloads with zero packet loss.

Details

Shipping, warranty & returns

Customer reviews

No reviews yet — be the first to review this part.

Power Supply	DC Input
Redundant Power	No (single PSU)

USB Port	Yes
Uplink Port	Yes
Console Port	Yes
Media Standard	Coaxial/Fiber
Shared SFP/SFP+	Yes
Port Configuration	32 x QSFP28

HPE R3B05A SN2745M 32x100G QSFP28 ONIE DC Switch

Product overview

Featuring

Network & Communication

Compatible systems

Best for

Details

Shipping, warranty & returns

Customer reviews

Power Consumption

Physical Characteristics

Environmental

Interface/Ports

Frequently asked questions

Form Factor	Rack-mountable 1U
Assembly Required	No
Modular Expansion	No