• Aruba S4B21A switch with 18x25G SFP28 ports, black silver design
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Aruba

Aruba S4B21A | CX 8325H Switch, 18x 25G SFP28, 4x 100G QSFP28, back-to-front airflow

S4B21A

Stock Status: Enquire

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Description

Data center‑ready 25/100G switch with eighteen SFP28 1/10/25GbE ports and four QSFP28 40/100GbE uplinks. Back‑to‑Front airflow supports equipment rows where ports face the hot aisle. Redundant hot‑swap PSUs and four fans ensure service continuity. AOS‑CX provides comprehensive L2/L3, EVPN‑VXLAN, VSX, and automation/analytics via NAE and REST.

Features

- Flexible 25G access with high-speed 40/100G uplinks
- Back-to-Front airflow for hot-aisle deployments
- High availability with dual hot-swap PSUs and fans
- Modern fabric support: EVPN-VXLAN and VSX
- Automation-first OS with NAE and REST APIs

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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Technical Specifications

FAQs

Technical Specifications

- Ports: 18x SFP28 1/10/25GbE
- Uplinks: 4x QSFP28 40/100GbE with 4x25G breakout support
- PoE: None
- Airflow: Back-to-Front
- Redundancy: 2x hot-swappable PSUs, 4x hot-swappable fans
- Form factor: 1U rack-mount
- OS/Features: AOS-CX with L2/L3, BGP, OSPF, VRF, EVPN-VXLAN, VSX
- Automation: NAE, REST API, Ansible/Python
- Manageability: CLI, Web UI, SSH, SNMP
- Optics: SFP28 compatible with 10G SFP+; QSFP28 supports 40/100G

FAQs

Q: What is the airflow direction on this model?
A: Back-to-Front airflow, suitable for hot-aisle port orientation.

Q: Are QSFP28 ports capable of 4x25G breakout?
A: Yes. Each QSFP28 can be split into 4x25G with supported breakout cables/optics.

Q: Do I need additional licenses for routing?
A: No. Core L3 features are included with AOS-CX.

Q: Can SFP28 ports accept 10G SFP+ modules?
A: Yes. They are backward compatible with SFP+ 10G optics and DACs.

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