Full Official English Description – Cisco Catalyst C9300-48HXB-A

1. Product Overview

2. Port Hardware Specifications

• Downlink Copper Ports: 48× full multigigabit RJ45 ports, IEEE 802.3bz compliant, auto-negotiate 100M / 1G / 2.5G / 5G / 10G BASE-T
• PoE Standard: IEEE 802.3bt Class 8 UPOE++ (UPOE+), up to 90W DC power output per individual port
• Rear Modular Uplink Slot: 1 hot-swappable network module bay, compatible with SFP+, SFP28, QSFP+, QSFP28 uplink modules supporting 10G / 25G / 40G / 100G fiber uplinks
• Stacking Interfaces: Dedicated rear StackWise-1T ports, maximum 1 Tbps bidirectional stacking bandwidth; supports stacking of up to 8 switches into one logical device
• Management Interfaces:
  1× RJ45 serial console port, 1× USB Type-A console port
  1× 1G out-of-band management Ethernet port
  1× USB 3.0 storage port for firmware upgrade, log export and offline config backup

3. Enhanced Performance & Scaling (Key “B” Model Differentiator)

• Standalone Switching Capacity: 2000 Gbps full-duplex
• Standalone Forwarding Rate: 1488 Mpps
• Stack Aggregated Bandwidth: Up to 3000 Gbps across full stack
• MAC Address Table: 64,000 MAC entries (double standard HX model capacity)
• IPv4 / IPv6 Routing Table: 64,000 route entries
• Multicast Group Table: 32,000 multicast group entries
• Shared Deep Packet Buffer: 32MB shared buffer (twice standard HX buffer size) for heavy burst video and IoT traffic
• ACL Scale: 4,000 ingress + 4,000 egress hardware ACL rules, higher than baseline C9300X-48HX variants

4. Power & Thermal Architecture

• PSU Support: 1 or 2 hot-swappable Platinum-efficiency AC power supplies with OIR (Online Insertion and Removal); factory default ships with single 1100W AC PSU (PWR-C1-1100WAC-P)
• Total UPOE++ PoE Budget:
  Single 1100W PSU: 590W total PoE power
  Dual high-wattage PSUs: Max 2880W full PoE capacity
• Cooling System: 3 field-replaceable variable-speed hot-swap fans with N+1 redundant design, low acoustic noise for office rack deployment
• Input Voltage: Universal 100–240V AC, 50/60Hz mains input

5. Stacking & Power Pooling Technology

• StackWise-1T: 1 Terabit high-speed stacking backplane, sub-50ms failover convergence during stack member hardware failure
• StackPower: Cross-stack power pooling across ring topology stack groups, dynamic PoE load balancing and redundant power backup for edge endpoints
• Mixed Stack Compatibility: Fully inter-stackable with all other Catalyst 9300X series switches (HX, HXB, HXN variants), unified single logical management domain under DNA Center

6. Hardware-Accelerated Enterprise Security (Unlocked via Network Advantage License)

• MACsec 256-bit AES link encryption supported on all copper downlinks and fiber uplinks
• Encrypted Traffic Analytics (ETA) for hidden malware detection over ciphered application flows
• Trustworthy Systems secure boot, runtime integrity verification and digital image authenticity validation
• TrustSec SGT group-based microsegmentation for SD-Access fabric deployments
• Endpoint Authentication Suite: IEEE 802.1X, MAB, captive WebAuth multi-factor access control
• Layer 2 Threat Mitigation: Dynamic ARP Inspection (DAI), DHCP Snooping, IP Source Guard, BPDU Guard, broadcast/multicast storm control
• Secure Management: SSH, HTTPS, SNMPv3, encrypted NETCONF/YANG transport

7. Layer 2 & Layer 3 Protocol Support

Layer 2 Features

Layer 3 Routing Protocols

8. Software & Cisco DNA Licensing Ecosystem

• Operating System: Cisco IOS XE 17.x universal image
• Preinstalled License Tier: Cisco DNA Network Advantage (perpetual)
  Unlocks full feature set: SD-Access fabric, ETA, TrustSec segmentation, ThousandEyes integrated network synthetic monitoring, containerized application hosting, advanced telemetry and full Layer 3 routing suite
• Unified Management Channels:
  CLI console/SSH, embedded web UI, Cisco Catalyst Center (DNA Center), Cisco Prime Infrastructure, Zero-Touch Provisioning (ZTP)
• Programmability: RESTCONF, NETCONF/YANG streaming telemetry, on-box Python guest shell, container hosting for local automation workloads

9. Physical & Environmental Specifications

• Form Factor: 1 Rack Unit (1RU) standard EIA rack-mount chassis
• External Dimensions: 445 mm (W) × 483 mm (D) × 44 mm (H)
• Chassis Weight (without power supplies): 6.62 kg (14.59 lbs)
• Operating Ambient Temperature: 0°C ~ +45°C
• Storage Temperature: -40°C ~ +70°C
• Operating Humidity: 5% – 90% non-condensing, non-condensation
• MTBF Rating: 185,420 hours under standard factory operating conditions

10. Model Naming Breakdown

• C9300X: Catalyst 9300X high-bandwidth StackWise-1T sub-series
• 48HX: 48-port full multigigabit 10G BASE-T UPOE++ copper chassis
• B: Enhanced deep buffer & expanded MAC/route/ACL scale variant
• A: Pre-activated Cisco DNA Network Advantage perpetual license

11. Typical Deployment Scenarios

1. High-density enterprise campus floor access for Wi-Fi 6 / 6E / 7 high-power Cisco APs with heavy concurrent client traffic
2. Large-scale IP PTZ camera & 4K video surveillance aggregation requiring deep packet buffering for burst video streams
3. Smart building IoT edge aggregation: access control panels, lighting controllers, industrial sensors, digital signage with mixed high/low power endpoints
4. Enterprise aggregation layer for multi-stack access switch consolidation with SD-Access fabric segmentation
5. Medium-size top-of-rack leaf switching for 10G copper server and workstation connectivity

Key Distinction Note