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Aruba

Aruba S4B21A#ABG | 25G SFP28 (18) + 100G QSFP28 uplinks (4), non‑PoE, L3 AOS‑CX, back‑to‑front airflow, 4x hot‑swap fans, 2x hot‑swap PSUs, 1U

Aruba S4B21A#ABG | 25G SFP28 (18) + 100G QSFP28 uplinks (4), non‑PoE, L3 AOS‑CX, back‑to‑front airflow, 4x hot‑swap fans, 2x hot‑swap PSUs, 1U

SKU:S4B21A#ABG

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Description

High‑performance leaf/aggregation switch with eighteen 1/10/25G SFP28 ports and four 40/100G QSFP28 uplinks for flexible spine/leaf designs. Built on AOS‑CX for advanced L2/L3, EVPN‑VXLAN, and automation via REST APIs. Redundant hot‑swap PSUs and fans with back‑to‑front airflow support data‑center cold‑aisle/ hot‑aisle deployments. Ideal for high‑density 25G access with 100G uplinks, VSX for non‑stop networking, and robust telemetry.

Features

- Flexible 25G access with 100G spine uplinks
- Redundant hot‑swap PSUs and fans for high availability
- Back‑to‑Front airflow optimized for data‑center aisles
- AOS‑CX automation with REST APIs and telemetry
- EVPN‑VXLAN, VRF, and VSX for scalable, resilient fabrics

Warranty

All products sold by XS Network Tech include a 12-month warranty on both new and used items. Our in-house technical team thoroughly tests used hardware prior to sale to ensure enterprise-grade reliability.

All technical data should be verified on the manufacturer data sheets.

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FAQs

Technical Specifications

FAQs

Q: Does this switch provide PoE on any ports?
A: No. All ports are non‑PoE data interfaces.

Q: Can the QSFP28 ports break out to 4x25G?
A: Yes, breakout to 4x25G is supported when using compatible breakout optics/cables and configurations.

Q: What airflow direction does this model use?
A: Back‑to‑Front airflow for data‑center deployments.

Q: Does it support EVPN‑VXLAN for leaf/spine?
A: Yes, EVPN‑VXLAN is supported for modern leaf/spine fabrics.

Q: Is a separate feature license required for L3 routing?
A: Core L3 features are included with AOS‑CX; optional subscriptions are only needed for enhanced management platforms.

Technical Specifications

- Port mix: 18x 1/10/25G SFP28 + 4x 40/100G QSFP28
- Uplinks: 4x 100G QSFP28 (40/100G capable; breakout support per optic/cable)
- PoE: None (non‑PoE)
- Airflow: Back‑to‑Front (B2F)
- Hardware: 4x hot‑swap fans, 2x hot‑swap PSUs
- Form factor: 1U rack‑mount
- Network OS: AOS‑CX
- Layer 3 features: OSPF, BGP, IS‑IS, PBR, VRF, EVPN‑VXLAN
- High availability: VSX, ISSU (OS‑dependent), N+1 fan/dual PSU
- Automation & ops: REST API, Python/Ansible support, telemetry/streaming
- Licensing: Advanced features included with AOS‑CX; optional cloud/on‑prem management subscriptions
- Management: CLI, Web UI, Aruba Central/NetEdit (optional)

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