Cisco SF250-24 24-PORT

Overview of the Cisco SF250‑24 24‑PORT Managed Switch

The Cisco SF250‑24 is a compact, 1‑U managed switch designed for small to medium‑sized businesses. It delivers robust Layer 2 and Layer 3 functionality while maintaining a low power footprint, making it ideal for office environments where space and energy efficiency are paramount.

Key Physical Characteristics

• Form Factor: 1 U rack‑mountable
• Color: Black
• Power Input: 100 – 240 V, 60 Hz
• Power Consumption: 10.9 W
• Heat Dissipation: 37.19 BTU/h
• USB Interface: 1 × USB 2.0 port for console access
• Power Connector: EU plug included

Port Configuration and Connectivity

• Fast Ethernet Ports: 24 × 10/100 Mbps RJ‑45
• Gigabit SFP Slots: 2 × combined Gigabit Ethernet / SFP
• Jumbo Frames: Supported up to 9000 bytes
• Ethernet Cable Standards: 10BASE‑T, 100BASE‑TX
• SFP Connector Type: Optical fiber (SFP)

Processing and Memory Resources

• Processor: 800 MHz CPU
• Internal Flash Memory: 512 MB
• Packet Buffer Memory: 12 MB
• RAM: 256 MB
• MAC Address Table Capacity: 8000 entries
• Access Control List (ACL) Rules: Up to 512 rules

Switching Performance and Quality of Service

• Forwarding Rate: 9.52 Mpps
• Number of Queues: 8 (supports Weighted Round Robin – WRR)
• Head‑of‑Line (HOL) Blocking: Enabled, ensuring efficient packet scheduling
• Quality of Service (QoS) Features: Supports IEEE 802.1p prioritization
• Time Between Failures (MTBF): 630,719 hours

Layer‑2 and Layer‑3 Capabilities

• Layer‑2 Features: VLAN support up to 256 VLANs, Stacked VLAN, Voice VLAN, Protocol‑Based VLAN, GVRP (GARP VLAN Registration Protocol)
• Layer‑3 Features: Static routing, OSPF (Open Shortest Path First), RIP (Routing Information Protocol)
• IPv4/IPv6: Dual‑stack support for both protocols
• DHCP Functions: DHCP server and relay capabilities

Security Protocols and Management

• Authentication: IEEE 802.1x with RADIUS support
• Secure Management: HTTPS, SSH, SSL/TLS for encrypted configuration sessions
• Access Control: ACLs with up to 512 rules, enabling granular traffic filtering
• Management Interfaces: Web UI, CLI over SSH/HTTPS, SNMP (v1/v2c/v3)

Environmental and Operational Parameters

• Operating Temperature: Not specified, but typical for Cisco devices
• Storage Humidity Range: 10 % – 90 %
• Operating Humidity Range: 10 % – 90 %

Standards Compliance

The switch adheres to a comprehensive set of IEEE networking standards, ensuring interoperability and reliable performance:

• IEEE 802.1D (Spanning Tree)
• IEEE 802.1Q (VLAN tagging)
• IEEE 802.1p (QoS priority)
• IEEE 802.1s (Multiple Spanning Tree Protocol)
• IEEE 802.1w (Rapid Spanning Tree Protocol)
• IEEE 802.1x (Port‑based authentication)
• IEEE 802.3 series (Ethernet standards from 10BASE‑T to 1000BASE‑SFP)

Use Cases and Deployment Scenarios

The Cisco SF250‑24 is engineered for environments that require:

• High density of Ethernet ports within a limited rack space
• Integrated Layer 3 routing for small branch offices or departmental networks
• Advanced VLAN segmentation and voice traffic prioritization for VoIP deployments
• Secure remote management with industry‑standard encryption protocols
• Energy‑efficient operation for green IT initiatives

Conclusion

The Cisco SF250‑24 24‑PORT Managed Switch combines a rich feature set with a compact, low‑power design. Its robust Layer 2/Layer 3 capabilities, extensive VLAN and QoS support, and secure management options make it a versatile solution for modern small‑to‑medium business networks that demand reliability, performance, and security without compromising on space or energy consumption.