Cisco C9300LM-48U-4Y-E=: How Does It Redefine Flexibility for High-Density Multi-Gig and PoE++ Networks?

Core Hardware and Port Architecture

The ​​Cisco Catalyst 9300LM-48U-4Y-E=​​ is a ​​48-port multi-Gigabit Layer 3 switch​​ engineered for environments requiring ​​universal port flexibility​​ and ​​ultra-high-power PoE++​​. It features ​​48x 1G/2.5G/5G/10GBase-T UPOE++ ports​​ and ​​4x 25G SFP28 uplinks​​, supported by a ​​1,400W AC power supply​​. Running ​​Cisco IOS XE​​, it enables advanced automation, ​​StackWise-480​​, and granular security policies.

Universal Port Flexibility and PoE++ Capabilities

• ​​Multi-Gig UPOE++ Ports​​: Auto-sensing ​​1G/2.5G/5G/10G speeds​​ with ​​90W per port​​ (IEEE 802.3bt) to power devices like ​​Wi-Fi 7 APs​​, ​​AI cameras​​, and ​​industrial machinery​​.
• ​​Dynamic Power Allocation​​: Prioritizes power to critical devices during outages, ensuring uninterrupted operations for life safety systems or manufacturing robots.

Performance and Scalability

• ​​Switching Capacity​​: 176 Gbps throughput handles bandwidth-intensive workloads like 8K video streaming or real-time machine learning inference.
• ​​StackWise-480​​: Combine up to 8 switches into a single stack with ​​480 Gbps per member​​ and ​​3.84 Tbps total bandwidth​​, ideal for hyperscale campus or industrial IoT deployments.

Security and Traffic Optimization

• ​​Cisco TrustSec®​​: Implements ​​software-defined macro-segmentation​​ to isolate OT devices, PCI systems, and guest traffic.
• ​​Application Visibility and Control (AVC)​​: Identifies and prioritizes latency-sensitive applications (e.g., VoIP, robotic control signals) using NBAR2.

Target Deployment Scenarios

This switch excels in ​​smart cities​​, ​​large healthcare networks​​, or ​​automated factories​​ where ​​multi-Gig speeds​​, ​​PoE++​​, and ​​carrier-grade uptime​​ intersect. Its ​​N+N power redundancy​​ and ​​hot-swappable modules​​ ensure 99.999% availability for critical infrastructure.

Licensing and Warranty

• ​​Cisco DNA Advantage​​: Includes ​​SD-Access​​, ​​AI-driven network assurance​​, and ​​Cisco ThousandEyes​​ for end-to-end visibility.
• ​​Enhanced Limited Lifetime Warranty (ELLW)​​: Extends coverage to 10 years with 24/7 TAC support and advanced hardware replacement.

Cost vs. Operational Agility

While the upfront cost is higher than traditional switches, the ​​C9300LM-48U-4Y-E=​​ consolidates ​​access, aggregation, and power delivery​​ into one platform. Its ​​25G uplinks​​ and ​​10GBase-T readiness​​ future-proof networks for Wi-Fi 7, 40G upgrades, or AI-driven edge computing.

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Deployment Experience

In a recent smart factory deployment, this switch powered ​​120+ collaborative robots​​ and ​​300+ 4K inspection cameras​​ without latency spikes. The ​​auto-negotiating multi-Gig ports​​ seamlessly integrated legacy PLCs and modern AGVs, while ​​StackWise-480​​ enabled zero-downtime firmware upgrades across 6 switches. For engineers balancing legacy and cutting-edge infrastructure, this model eliminates compromise by delivering both versatility and brute-force reliability.