Full Official English Description – Cisco Catalyst C9300-48UN-E

1. Product Overview

2. Port Hardware Specifications

• Downlink Copper Ports: 48 × IEEE 802.3bz Multigigabit RJ45 ports, auto-negotiable speeds: 100M / 1G / 2.5G / 5G BASE-T
• PoE Standard: Cisco UPOE (IEEE 802.3bt Class 6), maximum 60W DC power output per single copper port
• Rear Modular Uplink Bay: 1 hot-swappable uplink module slot, compatible with SFP+, SFP28, QSFP+ modules for 10G / 25G / 40G fiber uplink expansion
• Stacking Interfaces: Dedicated rear StackWise-480 stacking ports with 480 Gbps bidirectional stacking bandwidth; supports stacking of up to 8 switches into a single logical switching domain
• Management Interfaces:
  1 × RJ45 serial console port, 1 × USB Type-A console port
  1 × 1G out-of-band management Ethernet port
  1 × USB storage port for offline firmware upgrade, log export and configuration backup
• Onboard Storage & Memory: 8 GB DDR4 DRAM, 16 GB internal flash memory

3. Switching & Forwarding Performance

• Standalone Switching Capacity: 640 Gbps full-duplex
• Standalone Line-Rate Forwarding Rate: 476.19 Mpps
• Aggregated Stack Bandwidth: Up to 1120 Gbps across full stack
• Stack Aggregated Forwarding Rate: 833.33 Mpps
• MAC Address Table Capacity: 32,000 MAC forwarding entries
• IPv4 Routing Table: 32,000 route entries
• IPv6 Routing Table: 16,000 route entries
• Multicast Group Table: 8,000 multicast group entries
• Shared Packet Buffer: 16MB hardware buffer to absorb bursty wireless and IoT traffic
• Hardware ACL Scale: 5,120 ingress rules + 5,120 egress rules
• Flexible NetFlow Flow Table: 64,000 flow entries
• Jumbo Frame Support: Up to 9198 bytes

4. Power & Thermal Architecture

• Power Supply Support: 1 or 2 hot-swappable Platinum-efficiency AC power supplies with OIR (Online Insertion and Removal); factory default configuration ships with single 1100W AC PSU (PWR-C1-1100WAC-P)
• UPOE Power Budget Scaling:
  Single 1100W PSU: 645W total UPOE power allocation
  Dual redundant high-wattage PSUs: Max 1745W full PoE capacity for full 60W per-port endpoint deployment
• StackPower Technology: Cross-stack power resource pooling in ring topology, dynamic PoE load balancing and N+1 power redundancy across stack members
• Cooling System: 3 field-replaceable variable-speed hot-swap fans with redundant cooling design, low acoustic noise for office rack deployment
• Universal Input Voltage: 100–240V AC, 50/60Hz mains input

5. Stacking & High Availability Technology

• StackWise-480: 480 Gbps high-speed stacking backplane, sub-50ms traffic convergence during stack member hardware failure
• SSO/NSF: Stateful Switchover and Nonstop Forwarding to eliminate service interruption during stack supervisor role failover
• Mixed Stack Compatibility: Fully inter-stackable with all standard Catalyst 9300 Series switches (T/U/UN/H/S copper/fiber models), unified single logical management domain
• Cross-stack EtherChannel, Flexlink+ and Extended Fast Software Upgrade supported for stack-level resiliencyCisco

6. Hardware-Accelerated Baseline Security (Network Essentials Feature Set)

• MACsec 256-bit AES hardware link encryption supported on all copper downlinks and fiber uplink ports
• Trustworthy Systems secure boot, runtime integrity verification and digital firmware authenticity validation
• Endpoint Authentication Suite: IEEE 802.1X, MAB, basic WebAuth captive portal access control
• Layer 2 Threat Mitigation: Dynamic ARP Inspection (DAI), DHCP Snooping, IP Source Guard, BPDU Guard, broadcast/multicast storm suppression
• Secure Management Transport: SSH, HTTPS, SNMPv3 encrypted communication channels
  Key Limitation: Encrypted Traffic Analytics (ETA), TrustSec SGT microsegmentation and full SD-Access fabric capabilities are locked and require upgrade to Network Advantage (-A) license tier

7. Layer 2 & Layer 3 Protocol Support

Layer 2 Full Feature Set

Layer 3 Restricted Routing Suite (Limited by Essentials License)

8. Software & Cisco DNA Licensing Ecosystem

• Operating System: Cisco IOS XE universal switch image (17.x release train)
• Preinstalled Perpetual License Tier: Cisco DNA Network Essentials
  Core feature scope includes complete Layer 2 switching, lightweight Layer 3 routing, basic telemetry, zero-touch provisioning, standard QoS and baseline DNA Center integration. It excludes ETA malware analytics, TrustSec segmentation, containerized application hosting, ThousandEyes synthetic monitoring and SD-Access fabric architecture functions.
• Supported Management Interfaces:
  Local CLI via console/SSH, embedded web UI, Cisco Catalyst Center (DNA Center), Cisco Prime Infrastructure, Zero-Touch Provisioning (ZTP)
• Programmability: Basic NETCONF/YANG streaming telemetry, limited-function on-box Python guest shell

9. Physical & Environmental Specifications

• Form Factor: 1 Rack Unit (1RU) standard 19-inch EIA rack-mount chassis
• External Dimensions: 445 mm (W) × 445 mm (D) × 44 mm (H) / 17.5 × 17.5 × 1.73 inches
• Chassis Weight (single PSU installed): 9.09 kg (20.04 lbs)
• Operating Ambient Temperature: 0°C ~ +45°C
• Storage Temperature: -40°C ~ +70°C
• Operating Humidity: 5% – 90% non-condensing
• Typical MTBF Rating: 198,647 hours under standard factory operating conditions
• Compliance Certifications: UL, CSA, CE, FCC Class A, ICES-003, RoHS, TAA compliant

10. Model Naming Breakdown

• C9300: Base standard Catalyst 9300 stackable enterprise switching platform (StackWise-480 non-X series)
• 48UN: 48-port 5G multigigabit mGig RJ45 chassis with Cisco UPOE (max 60W per port)
• E: Pre-activated Cisco DNA Network Essentials perpetual baseline license tier

11. Typical Deployment Scenarios

1. Mid-density enterprise campus floor access for Wi-Fi 6/6E medium-power wireless APs requiring 5G multigigabit bandwidth
2. Medium-scale IP surveillance aggregation for 60W PTZ cameras without 90W UPOE++ power demand
3. Modern office workgroup access with mixed laptops, IoT sensors and video conference endpoints
4. Small-to-medium branch office stacking deployments relying only on basic Layer 3 connectivity
5. Entry-level non-fabric access layer without SD-Access segmentation architecture requirements

Key Distinction Note

• -E (Network Essentials): Baseline Layer 2 & lightweight Layer 3 routing only, excludes BGP, PBR, ETA and fabric segmentation capabilities, lower upfront procurement cost
• -A (Network Advantage): Full advanced routing suite, ETA malware analytics, TrustSec microsegmentation, SD-Access fabric and container application hosting full-feature license