Cisco Business CBS250-8T-E-2G Full English Product Description

1. Product Overview

Model Suffix Definition

• 8: 8×10/100/1000BASE-T non-PoE copper access ports
• T: Data-only RJ45 ports without PoE power supply
• E: Compact 1RU rack-mount desktop form factor powered by external universal AC-DC wall adapter
• 2G: Two dedicated 1G SFP/RJ45 combo uplink ports for long-distance fiber or copper upstream aggregation

2. Hardware Port Specifications

• Access Ports: 8 auto-sensing 10/100/1000BASE-T RJ45 copper ports, non-PoE, Auto MDI/MDI-X, Cat5e/Cat6 cabling compatible
• Uplink Interfaces: 2×1G SFP/RJ45 combo dual-purpose ports; support standard 1G SFP optical transceivers and copper Gigabit uplink cables
• Management Interfaces: Mini USB serial console port + RJ45 console port, HTML5 encrypted web GUI, front USB Type-A for config/firmware upload, Bluetooth mobile configuration, SNMP v1/v2c/v3
• LED Indicators: Independent front-panel LEDs for global power status, per-port link/activity, 10/100/1000Mbps speed and combo uplink operating state
• Hardware Reset Button: Recessed physical reset button for one-click full factory default restoration
• Cooling Architecture: Fully fanless passive heat sink design with zero operational noise, suitable for clinics, libraries and quiet open office environments
• Power Mode: External universal DC wall adapter (marked -E), no built-in internal AC power supply inside chassis; zero PoE power budget for all copper ports

3. Core Performance Parameters

• Switching Capacity: 20 Gbps non-blocking wire-speed switching
• 64-byte Packet Forwarding Rate: 14.88 Mpps
• MAC Address Table Depth: 8,192 MAC entries
• Jumbo Frame Support: Up to 9216 bytes for large file and low-bitrate surveillance video transmission
• Energy Efficiency Standard: IEEE 802.3az EEE auto power shutdown for idle Ethernet links
• Max Full Traffic Load Power Consumption: ~12 W
• Idle Standby Power Draw: ~6 W
• Input Power: External universal adapter, wide AC input 100–240V 50/60Hz

4. Physical & Environmental Specifications

• Form Factor: Compact 1RU metal chassis, rack-mount and wall-mount brackets pre-installed for flexible deployment
• Dimensions (W × D × H): 268 mm × 185 mm × 44 mm (10.56 × 7.28 × 1.73 inches)
• Net Weight: 0.45 kg (0.99 lb), lightweight for hidden under-desk installation
• Operating Temperature Range: -5 °C to 50 °C (23 °F–122 °F), certified for out-of-wiring-closet deployment
• Storage Temperature Range: -25 °C to 70 °C (-13 °F–158 °F)
• Relative Humidity: 10%–90% non-condensing humidity during operation and storage
• Compliance Certifications: CE, FCC, UL 6236, RoHS compliant; Cisco limited lifetime hardware warranty

5. Complete Layer 2 + Native Layer 3 Feature Suite (Core Upgrade vs CBS220)

Layer 2 Full Smart Switch Functions

• IEEE 802.1Q VLAN, supports up to 4094 VLAN IDs, dedicated voice VLAN optimized for mass IP phone deployment
• Full STP suite: STP, RSTP, MSTP fast convergence to eliminate Layer 2 broadcast forwarding loops
• Static LAG & IEEE 802.3ad LACP dynamic link aggregation for uplink bandwidth bundling
• IGMP Snooping v1/v2/v3 + Multicast VLAN Replication to reduce multicast bandwidth waste for IPTV and multi-camera surveillance streams
• Auxiliary L2 Tools: Embedded cable diagnostic, hardware port isolation, broadcast/multicast storm suppression, auto idle-port power cut

Exclusive Layer 3 Static Routing (CBS250 Series Highlight)

• IPv4/IPv6 static inter-VLAN routing to realize cross-VLAN communication without extra core routers
• Supports up to 128 static routing entries for segmented small business workgroup network planningCisco

6. Enterprise-Grade Multi-Layer Network Security

• 802.1X port-based authentication, MAC authentication and guest VLAN access control
• Port Security with configurable MAC address limits to defend against malicious MAC flooding attacks
• IPv4/IPv6 granular bidirectional ACL for fine-grained inbound/outbound traffic filtering
• Secure management channels: HTTPS encrypted web GUI, SSH console CLI, SNMPv3 encrypted transmission
• Anti-spoofing protection: Dynamic ARP Inspection (DAI), IP Source Guard to block IP/MAC address spoofing
• Full-port surge and short-circuit protection for all RJ45 copper ports against faulty Ethernet cables

7. Automatic Hardware QoS Traffic Prioritization

• 4 independent hardware priority queues per Gigabit port
• Native auto recognition and mapping of 802.1p CoS and DSCP marked packets without manual configuration
• Hybrid Strict Priority + WRR scheduling to guarantee ultra-low latency for VoIP voice and real-time surveillance video
• Port ingress/egress bandwidth policing and traffic shaping to avoid single-port congestion

8. Multi-Mode Local & Centralized Management Advantages

• Local Management: HTML5 web GUI, mini USB/RJ45 dual console CLI, front USB config backup/restore, Bluetooth wireless mobile configuration
• Cross-Site Centralized Management: Compatible with Cisco Business Dashboard and Cisco DNA Center for unified multi-branch monitoring, batch configuration push and zero-touch provisioning (ZTP)
• Firmware & Config Operations: TFTP/HTTP batch firmware upgrade, one-click full-config backup & restore via front USB port
• Monitoring Utilities: SNMP v1/v2c/v3, NTP time synchronization, real-time port traffic statistics, sFlow traffic sampling
• Standalone operation only; horizontal hardware stacking feature is exclusive to "-4G" 1G uplink CBS250 rack models
• Dual deployment modes: Standard rack mounting in small wiring closets or hidden wall/desktop placement
• Fully silent fanless design fits noise-restricted classrooms, medical clinics and open office spaces
• 1G SFP combo uplink reserves long-distance fiber expansion space for future network upgrades

9. Typical Application Scenarios

• Small office non-PoE managed access layer for staff PCs and fixed office workstations
• Retail convenience kiosks and self-service terminals with non-PoE data-only equipment
• School auxiliary labs, libraries and quiet classroom network environments requiring silent manageable switches
• Mini media design workgroups with small-capacity NAS storage via 1G fiber uplink links
• Remote edge sites requiring independent long-distance Gigabit fiber aggregation to core network
• Low-bandwidth distributed IoT sensor deployment outside centralized wiring closets without PoE power demands
• Small segmented business networks needing inter-VLAN Layer 3 static routing capability

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