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Hardware Architecture and Core Features
The Cisco Catalyst C9300-24UB-E is a 24-port Layer 3 stackable switch designed for high-density uplink environments requiring a balance of speed and scalability. It combines 24x 1G/10G SFP+ ports with 8x 40G QSFP28 uplinks, prioritizing spine-leaf readiness and enterprise edge deployments.
Key specifications:
- Dual-mode uplinks: The 40G QSFP28 ports can split into 4x 10G connections for cost-effective scaling.
- Non-PoE design: Focuses purely on data throughput, ideal for fiber-dense backbones.
- StackWise-480: Delivers 480 Gbps stacking bandwidth for unified management of up to 8 switches.
- Cisco DNA Essentials: Includes base-level SD-Access for automated VLANs and device profiling.
C9300-24UB-E vs. Other Catalyst 9300 Models: Strategic Fit
This model targets networks where uplink flexibility outweighs PoE or redundancy needs.
| Feature | C9300-24UB-E | C9300-24U-E= |
|---|---|---|
| Uplink Ports | 8x 40G QSFP28 | 8x 40G QSFP28 |
| Licensing Tier | DNA Essentials | DNA Essentials |
| Key Differentiator | Split 40G to 10G | Fixed 40G uplinks |
| Use Case | Scalable aggregation | High-speed spine-core |
Deployment Scenarios: Maximizing the 24UB-E’s Strengths
- Cloud service edge nodes: Aggregates traffic from distributed micro-data centers.
- Media broadcasting: Supports low-latency 4K/8K video transport across 10G/40G links.
- Research networks: Handles data-intensive workloads like genomic sequencing or AI training clusters.
A streaming provider in South Korea reduced hardware costs by 15% using the C9300-24UB-E’s 40G-to-10G breakout capability, avoiding separate 10G spine switches.
Addressing Critical Buyer Questions
Q: Can the 40G ports support 100G with optics?
No—this model maxes out at 40G. For 100G, consider the C9300-NM-4Q module on compatible Catalyst 9300s.
Q: Is redundancy possible without StackWise?
Yes, using VRRP or HSRP, but StackWise-480 simplifies failover and management.
Q: What’s the benefit of DNA Essentials here?
It automates basic SD-Access workflows—ideal for teams transitioning from manual CLI configurations.
Why This Switch Is a Silent Enabler for Scalable Networks
The C9300-24UB-E thrives in environments where uplink agility and cost-per-Gbps dictate decisions. While lacking PoE or redundant power, its ability to split 40G ports into 10G links makes it a budget-friendly spine alternative for mid-sized data centers. For enterprises eyeing gradual 25G/40G adoption, it’s a low-risk stepping stone.
For procurement details, visit “C9300-24UB-E”.
Personal Insight: In a recent smart city project, we used the 24UB-E to aggregate traffic from IoT gateways and surveillance cameras. Its split 40G uplinks allowed seamless integration with legacy 10G switches, bridging old and new infrastructure without overhaul costs. While not glamorous, its value lies in pragmatic scalability—a trait often overlooked in flashier models.