SG250-50-K9 - 50-Port Gigabit Smart Managed Switch

Cisco 250 Series 50-port Gigabit Smart Managed Layer 2/3 switch with 48 GE ports, 2 combo uplinks, and lifetime warranty for SMB networks.

The Cisco SG250-50-K9 is part of the Cisco 250 Series Smart Switches, a line positioned between unmanaged and fully managed switches, offering business-class network performance without unnecessary complexity or cost. It provides 50 Gigabit Ethernet ports (48 fixed 10/100/1000 RJ-45 ports plus 2 Gigabit copper/SFP combo uplink ports) suited for connecting computers, IP phones, printers, and wireless access points in small-to-medium business and branch office environments. The switch delivers a 100 Gbps switching capacity and 74.41 Mpps forwarding rate, and supports VLAN segmentation, QoS, ACLs, Layer 3 static routing, and IPv6. Management is available through an intuitive web interface, Cisco FindIT Network Manager, and Auto Smartports technology for simplified deployment. The product has since reached End-of-Sale/End-of-Life status, with Cisco recommending the CBS250 Series as its replacement.

• Manufacturer: Cisco Systems, Inc.
• Product Family: Cisco 250 Series Smart Switches
• Product Series: SG250
• Model: SG250-50
• Product Type: Smart Managed Layer 2/3 Ethernet Switch
• Total Ports: 50 Gigabit Ethernet ports
• RJ-45 Ports: 48 x 10/100/1000 Gigabit Ethernet
• Uplink Ports: 2 x Gigabit Ethernet RJ-45/SFP combo ports
• Switching Capacity: 100 Gbps
• Forwarding Rate: 74.41 Mpps (64-byte packets)
• MAC Address Table: 8,000 entries
• VLANs Supported: 256 active VLANs
• ACL Rules: 512
• MSTP Instances: 8
• Priority Queues: 8
• Management Protocols: SNMP v1/v2c/v3, RMON, Telnet, HTTP/HTTPS, TFTP, SSH/SSH-2, CLI, SCP
• Routing: Layer 3 static routing
• IP Support: IPv4 and IPv6, USGv6 and IPv6 Gold Logo certified
• Fans: Fan-cooled (models vary by SKU)
• Power Input: 100–240V AC, 50–60 Hz, internal universal power supply
• Power Consumption: Approx. 35.40 W (non-PoE model)
• PoE Support: Not applicable (non-PoE base model; PoE variants available as SG250-50P/50HP)
• Form Factor: 1U Rack-mountable
• Warranty: Cisco limited lifetime hardware warranty; 1-year for fans/power supplies
• Product Status: End-of-Sale / End-of-Life (replaced by CBS250 Series)

• 50 Gigabit Ethernet ports including 48 fixed 10/100/1000 ports for high-density connectivity
• 2 Gigabit copper/SFP combo uplink ports for flexible fiber or copper uplink options
• 100 Gbps switching capacity with 74.41 Mpps forwarding performance
• Layer 3 static routing for efficient internal traffic management
• Native IPv6 support alongside IPv4 with USGv6 and IPv6 Gold Logo certification
• Auto Smartports technology for automatic, zero-touch port configuration
• Easy-to-use web-based user interface for simplified setup and management
• Advanced QoS features to prioritize voice, video, and other delay-sensitive traffic
• VLAN segmentation and access control lists (ACLs) for network security
• Cisco FindIT Network Manager and Network Plug-and-Play support
• USB port for fast configuration and firmware image transfer
• Cisco limited lifetime hardware warranty for long-term investment protection

Designed to deliver reliable, cost-effective connectivity for growing small and medium-sized business networks.

• Core or access-layer switching for small office and branch office networks
• Connecting desktop computers, printers, and IP phones in SMB environments
• Providing uplinks to wireless access points for business Wi-Fi deployments
• Segmenting network traffic via VLANs for departments or guest access
• Supporting unified communications deployments requiring QoS prioritization
• Enabling internal Layer 3 static routing between VLANs without a separate router
• Building secure, scalable wired infrastructure for retail or hospitality locations

• High port density for growing SMB networks
• Cost-effective alternative to fully managed switches
• Simplified setup via web UI and Auto Smartports
• Reliable 100 Gbps switching performance
• Lifetime hardware warranty reduces ownership risk
• IPv6-ready to support future network needs

• Form Factor: Rack-mountable, 1U
• Height: 1.7 inches
• Width: 17.3 inches
• Depth: 10.1 inches
• Weight: Approximately 6.48 lb

Per available documentation, this switch has been tested for interoperability with the following Cisco products and standards:

• Cisco Small Business IP phones and unified communications endpoints
• Cisco Small Business wireless access points
• Cisco FindIT Network Manager for centralized management
• Cisco Smart Network Application (SNA) for embedded monitoring
• Cisco Network Plug and Play (PnP) provisioning
• Standard Gigabit Ethernet SFP transceiver modules (copper/fiber)
• IEEE 802.1Q VLAN tagging standard devices
• IEEE 802.1x network access control compliant devices

Note: This model is discontinued; Cisco recommends the CBS250 Series (e.g., CBS250-48T-4G) as the current-generation replacement for new deployments.

• Cisco SG250-50 50-Port Gigabit Smart Switch
• Power cable
• Mounting brackets and screws for rack installation
• Quick start/installation guide

Q: What is the Cisco SG250-50-K9?

A: It is a 50-port Gigabit Smart Managed switch from Cisco's 250 Series, featuring 48 fixed Gigabit Ethernet ports and 2 combo uplink ports, designed for small and medium-sized business networks.

Q: Does the SG250-50-K9 support PoE?

A: No, the base SG250-50-K9 model does not provide Power over Ethernet. PoE variants are available under different part numbers, such as SG250-50P (375W PoE+) and SG250-50HP (192W PoE+).

Q: Is the Cisco SG250-50-K9 still available for purchase?

A: No, Cisco has announced End-of-Sale and End-of-Life for this model, with the CBS250 Series recommended as the current replacement.

Q: What is the switching capacity of the SG250-50-K9?

A: The switch offers a 100 Gbps switching capacity with a forwarding rate of 74.41 Mpps for 64-byte packets.

Q: Does the SG250-50-K9 support Layer 3 features?

A: Yes, it supports Layer 3 static routing in addition to standard Layer 2 switching functions.

Q: What warranty does the SG250-50-K9 include?

A: The switch is covered by Cisco's limited lifetime hardware warranty, with a 1-year limited warranty specifically for fans and power supplies.

Q: How is the SG250-50-K9 managed?

A: It can be managed through an intuitive web-based user interface, SNMP, CLI, SSH, Telnet, and Cisco FindIT Network Manager.

Q: What is the recommended replacement for the SG250-50-K9?

A: Cisco's official end-of-life documentation lists the CBS250-48T-4G from the CBS250 Series as the direct replacement product.