Cisco CBS350X-24NGU-4X Full English Product Description
1. Short Sales Title (For Quotation & E-commerce Listing)
Cisco CBS350X-24NGU-4X Business 350X Series 24-Port Multi-Gigabit Non-PoE Fully Managed Layer 3 Switch, Global Standard Version, Mixed 1G & 5GBase-T Multi-Speed Copper Ports, 4 Dedicated 10G SFP+ High-Speed Uplink Slots (4X = four 10G fiber uplinks, distinct from 4G 1G SFP uplink models), Dual-Stack IPv4/IPv6 Dynamic Routing, Enhanced True Stackable, 1RU Rackmount Mid-Density Multi-Gigabit 10G Uplink Aggregation Switch
2. Official Product Overview
The Cisco CBS350X-24NGU-4X is an upgraded multi-gigabit non-PoE enterprise Layer 3 managed switch within the enhanced Cisco Business 350X high-performance switch lineup, equipped with upgraded processing chipset, faster stacking bandwidth and optimized variable-speed fan thermal architecture compared to the standard CBS350 generation.
Model Suffix Breakdown
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NGU: Next-Gen Multi-Gigabit Unpowered (Non-PoE) — 20×10/100/1000BASE-T Gigabit RJ45 + 4×5GBase-T high-speed multi-gigabit RJ45 copper ports, zero built-in PoE power delivery
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4X: Four independent dedicated 10G SFP+ fiber uplink ports for 10-Gigabit high-bandwidth cross-building backbone backhaul, clearly differentiated from 4G variants only supporting 1G Gigabit SFP uplinks.
Designed for medium enterprise mixed-speed office access layers, multi-floor media production workgroup aggregation, retail multi-speed terminal networks, optical NAS storage backhaul and fiber surveillance edge environments without PoE-powered endpoints. Surpassing entry-level CBS250 smart switches and base CBS350 models, CBS350X delivers a full enterprise-grade feature suite: dynamic RIPv2 IPv4 routing, enhanced single-IP true stacking (supports up to 4 CBS350X units), comprehensive anti-spoofing security toolkit, sFlow traffic analytics and complete multicast traffic control.
This mixed multi-gigabit copper-only switch provides flexible hybrid speed connectivity for standard Gigabit office desktops, 5G high-performance video editing workstations, POS terminals and standalone Wi-Fi 6/6E wireless access points. Four standalone 10G SFP+ fiber uplink slots deliver redundant high-speed backbone interconnection to core switches over long-distance single/multi-mode fiber, eliminating bandwidth bottlenecks for high-volume mixed-speed business workloads. No PoE power module is integrated, intended for deployments where endpoints use separate local power adapters.
It features 20×Gigabit + 4×5GBase-T multi-gigabit RJ45 copper access ports plus 4 dedicated 10G SFP+ fiber uplink slots, offering 24 mixed-speed copper access interfaces + 4×10G high-speed uplink ports for scalable fiber backbone deployment. Powered by an upgraded high-performance ARM processor with 512MB DRAM and 256MB flash memory, it delivers 168 Gbps non-blocking switching capacity and 125 Mpps wire-speed forwarding rate for 64-byte frames, paired with an enhanced 3MB shared dynamic packet buffer to eliminate congestion under mixed-speed office traffic, bulk multi-TB NAS storage transfers and multi-stream 4K surveillance backhaul over 10G fiber links. Intelligent variable-speed multi-fan cooling ensures stable 24/7 continuous rack operation in office equipment rooms, media studio racks and campus wiring closets.
3. Port & Hardware Specifications
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20 × 10/100/1000BASE-T RJ45 copper ports, auto-negotiate 1G/100M, No PoE support
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4 × 5GBase-T multi-gigabit RJ45 copper ports, auto-negotiate 5G/2.5G/1G/100M, No PoE support
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All 24 access ports are unpowered, zero PoE power supply
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4 × dedicated 10G SFP+ uplink slots (fiber-only non-combo design, 4X = four 10G high-speed uplink ports, completely separated from 4G 1G-only SFP uplink models)
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Supported Cisco transceivers: Gigabit SFP (MGBSX1/MGBLX1/MGBLH1/MGBT1), 10G SFP+ (SFP-10G-SR, SFP-10G-LR, SFP-10G-LX, copper twinax SFP+)
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No integrated PoE power module
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Internal universal AC power supply: 100–240V 50/60Hz global standard power cord
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Upgraded intelligent variable-speed multi-fan thermal cooling system for long-term heavy mixed-speed traffic loads
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Switching Capacity: 168 Gbps Non-Blocking
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Forwarding Rate (64-byte packets): 125 Mpps
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Shared Packet Buffer: 3 MB
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MAC Address Table: 16K entries; Jumbo Frame support up to 9000-byte MTU
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Dual console ports: RJ45 serial console + mini USB port for offline local CLI configuration
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Front-panel USB Type-A port for offline configuration backup & firmware upgrade
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Enhanced true stacking capability: stack up to 4 CBS350X series switches under single IP unified management with improved stack throughput; cross-stack LAG, VLAN, QoS and remote port mirroring fully supported
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Form Factor: 1RU standard rackmount chassis, support rack mount, wall mount and desktop placement
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Dimensions: 445 × 308 × 44 mm (17.5 × 12.14 × 1.73 inches)
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Weight: 2.32 kg (5.11 lbs)
4. Comprehensive Layer 2 Switching Functions
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Up to 4096 IEEE 802.1Q tagged VLANs, port-based VLAN, voice VLAN, guest VLAN, private VLAN, dedicated management VLAN
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8 priority egress queues with Strict Priority / WRR / SPQ QoS scheduling to prioritize multi-gigabit low-latency VoIP, 4K surveillance video and enterprise high-volume business data traffic
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IEEE 802.3ad LACP link aggregation, multiple LAG groups for bandwidth expansion & link redundancy, cross-stack LAG fully supported
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IGMP Snooping v1/v2/v3 with built-in IGMP Querier, supporting up to 1024 multicast groups for IPTV and mass multi-gigabit IP surveillance
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LLDP & LLDP-MED automatic endpoint discovery for multi-speed workstations, fiber-connected cameras and high-speed wireless gateways
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Port mirroring, VLAN mirroring, RSPAN remote mirroring, RSTP/MSTP/PVST+ spanning tree, BPDU Guard, Root Guard, Loop Guard
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Broadcast/multicast/unicast storm control to prevent multi-gigabit and 10G uplink flooding failures
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Enterprise anti-spoofing toolkit: DHCP Snooping, Dynamic ARP Inspection (DAI), IP Source Guard, static IP/MAC/Port Binding
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sFlow traffic monitoring for real-time multi-gigabit and 10G uplink flow-level bandwidth analysis and network fault troubleshooting
5. Advanced Dual-Stack Dynamic Layer 3 Routing
Far exceeding static-only routing on CBS250 smart switches, CBS350X provides full wire-speed Layer 3 forwarding:
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Dynamic routing protocol: RIPv2 for IPv4
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Up to 990 IPv4 static routes, 990 IPv6 static routes, 128 Layer 3 VLAN interfaces
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Native dual-stack IPv4/IPv6 wire-speed forwarding, CIDR aggregation, full IPv6 first-hop security (ND Inspection, RA Guard)
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Built-in IPv4 DHCP Server & DHCP Relay with Option 82, UDP relay functionality
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Policy-Based Routing (PBR) for flexible traffic steering across fiber-separated multi-floor network segments
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Direct inter-VLAN routing without external routers to reduce core gateway latency and bandwidth load for cross-building 10G backbone traffic
6. Enterprise-Grade Multi-Layer Security Suite
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IEEE 802.1X port-based authentication with RADIUS/TACACS+ centralized access control, web-based captive portal authentication
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Port security, static/dynamic MAC address binding, automatic port shutdown for unauthorized multi-gigabit-connected terminals
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Comprehensive DoS attack suppression, hardware accelerated L2-L4 ACL traffic filtering for mixed-speed copper and 10G fiber links
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Encrypted management channels: HTTPS web GUI, SSH multi-privilege CLI, SCP file transfer, SNMPv3 secure remote monitoring
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Persistent syslog event logging, built-in cable diagnostic tools, mandatory password complexity policy
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Independent guest network isolation, Private VLAN Edge (PVE) for client separation
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Secure boot, encrypted configuration file storage, IPv6 ND Inspection & RA Guard to block IPv6 fiber link spoofing attacks
7. Energy-Saving Green Technologies
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IEEE 802.3az Energy Efficient Ethernet (EEE): auto power reduction for idle multi-gigabit copper and SFP+ fiber links
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Dynamic power tuning based on link speed and cable length to cut unnecessary power consumption
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Port LED dimming or full shutdown mode for unmanned multi-speed wiring closets
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Intelligent variable fan speed adjustment to reduce power draw and noise under light network load
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Optimized upgraded hardware thermal design with balanced heat dissipation and extended service lifespan
8. Multi-Mode Local & Remote Management
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Intuitive graphical web management interface (HTTP/HTTPS) with basic & advanced operation modes
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Dual offline local console access: serial RJ45 + mini USB port for offline CLI configuration
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SSH secure remote command line management with multi-user privilege levels (1 / 7 / 15)
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SNMP v1/v2c/v3 compatible with third-party network monitoring platforms, native sFlow support
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TFTP/SCP/offline USB firmware upgrade, dual redundant firmware images for reliable zero-downtime upgrades
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SNTP time synchronization, ping & traceroute diagnostic tools, Smartport auto-provisioning templates dedicated for multi-gigabit endpoints
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Single IP enhanced stacking management for centralized batch control of up to 4 stacked CBS350X switches
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Fully compatible with Cisco Business Dashboard & Cisco Business Mobile App for unified topology visualization and zero-touch mixed-speed multi-gigabit network deployment
9. Physical & Environmental Parameters
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Operating Temperature: -5°C to 50°C; Storage Temperature: -25°C to 70°C
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Operating Humidity: 10%–90% non-condensing relative humidity
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Global compliance standards: CE, RoHS, UL, FCC Class A
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MTBF: 1,720,000+ hours at 25°C ambient temperature
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Warranty: Cisco Limited Lifetime Hardware Warranty
10. Typical Deployment Scenarios
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Medium enterprise mixed-speed workstation aggregation switch for standard Gigabit office PCs and 5G high-performance video editing equipment & mini optical NAS storage
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Multi-building campus distribution switch with flexible mixed 1G/5G multi-gigabit copper ports and 10G SFP+ fiber uplinks interconnecting office, classroom and media studio blocks
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Professional media production studio mixed-speed network for low-latency 4K/8K video workflow and optical storage access
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Large retail chain back-office core switch mixing standard Gigabit POS terminals and 5G high-speed servers with 10G fiber backbone
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Stackable multi-switch scalable SMB network leveraging enhanced true stacking and dynamic Layer 3 routing with mixed multi-gigabit copper and high-bandwidth 10G uplink capacity
11. Standard Package Contents
1 × Cisco CBS350X-24NGU-4X Next-Gen Multi-Gigabit Non-PoE Fully Managed Switch (Global Standard Version)
1 × Global standard AC power cord
Rack mounting brackets and installation screws
Quick Start Guide & global regulatory compliance documents
Short Commercial Version (For Product Ads & Listing Titles)
The Cisco CBS350X-24NGU-4X is an upgraded global next-gen multi-gigabit non-PoE fully managed Layer 3 switch under Cisco Business 350X series, equipped with 20×1G + 4×5GBase-T mixed multi-speed copper access ports and 4 dedicated 10G SFP+ high-speed fiber uplink ports (4X = four 10G uplink slots, separate from 1G SFP 4G models). Featuring dynamic dual-stack IPv4/IPv6 Layer 3 routing, enhanced high-speed true stacking capability, enterprise anti-spoofing security, full QoS and intelligent variable-speed fan thermal design, it delivers non-blocking flexible mixed multi-gigabit data connectivity for multi-speed workstations, media editing equipment and optical storage in medium enterprise, media studio and campus high-bandwidth core networks, supporting rack/wall/desktop deployment, energy-efficient upgraded hardware and Cisco Limited Lifetime Hardware Warranty.
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