Cisco Catalyst WS-C2950SX-48-SI Full English Product Description
1. Short Sales Title (For Quotation & E-commerce Listing)
Cisco WS-C2950SX-48-SI 1RU Rack-Mount Layer 2 Fast Ethernet Access Switch, 48×10/100BASE-TX RJ45 Downlink Ports, 2 Fixed 1000BASE-SX Gigabit Multimode Fiber Uplinks, Preloaded Standard IOS Image (SI), Fixed Copper+Gigabit Fiber Chassis, Cisco Switch Clustering Supported, Wire-Speed QoS, VLAN & Port Security, Ideal for Large Enterprise Office, Multi-Building Campus, Large Branch Wiring Closet & Legacy High-Density Fiber Trunk Deployments
2. Official Product Overview
The Cisco Catalyst WS-C2950SX-48-SI is a high-density fixed-port Layer 2 managed Fast Ethernet switch from the legacy Catalyst 2950 intelligent edge switching family. Differentiated from copper-uplink WS-C2950T-48-SI and modular GBIC 2950G-48-EI models, this unit integrates two built-in permanent 1000BASE-SX Gigabit multimode fiber uplink ports for high-bandwidth long-distance inter-building trunking without separate transceivers. It ships factory preloaded with Standard Image (SI) Cisco IOS firmware, which only delivers baseline Layer 2 switching, QoS and basic security functions; advanced enterprise features such as 802.1X authentication, SSHv2, SNMPv3, multi-layer ACLs and private VLAN edge are exclusive to Enhanced Image (EI) hardware variants.
Model Suffix Breakdown
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2950: Catalyst 2950 intelligent edge managed switch series
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48: Forty-eight fixed 10/100 auto-negotiation RJ45 copper downlink access ports for dense end-user connectivity
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SX: Dual integrated fixed 1000BASE-SX Gigabit multimode fiber uplink ports (850nm wavelength multimode fiber)
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SI: Standard IOS Image with core basic Layer 2 feature set, no advanced security & traffic control functions
This compact 1U metal rack-mount chassis features an internal autoranging AC power supply and front cooling fan for stable wiring closet operation. Cisco Switch Clustering technology enables unified single-IP management of multiple Catalyst 2950 series switches to scale port density across multi-floor campus and large office deployments. All RJ45 ports support IEEE auto-negotiation (10/100 speed, half/full duplex) and auto MDI-X to eliminate crossover cable requirements. The embedded 1000BASE-SX fiber ports support Gigabit trunk transmission up to 550 meters over standard 62.5/125μm multimode fiber, delivering high-speed inter-switch interconnection without extra GBIC/SFP modules.
Equipped with 16 MB DRAM, 8 MB flash storage and shared 8 MB packet buffer memory, the WS-C2950SX-48-SI delivers 13.6 Gbps non-blocking switching capacity and 10.1 Mpps wire-speed forwarding rate for 64-byte frames, supporting lossless concurrent voice, video and data traffic across all 48 copper access ports and dual Gigabit fiber uplinks. It adopts store-and-forward switching architecture to filter corrupted frames and prevent broadcast domain flooding across the entire LAN segment.
3. Port & Hardware Specifications
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48 × 10/100BASE-TX RJ45 auto-sensing copper access ports, auto MDI-X, IEEE 802.3x full-duplex flow control
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2 × fixed 1000BASE-SX Gigabit multimode fiber uplink ports, 850nm wavelength, max 550m full-duplex transmission over standard multimode fiber
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1 × RJ45 RS232 serial console port for out-of-band CLI configuration without live network connectivity
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No modular expansion slots, all ports fixed copper/fiber integrated design
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Stacking capability: Cisco Switch Clustering via Fast Ethernet or Gigabit SX fiber inter-switch trunk links
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Power supply: Internal fixed autoranging AC input (100–240 VAC 50/60 Hz), max power consumption 50W
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Rear RPS connector: Compatible with optional Cisco external redundant power supply for power failure resilience
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Front panel LED indicators: Per-port link/activity, speed, duplex; fiber uplink status, system bandwidth utilization, RPS power fault alarm
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Mounting options: 19-inch 1RU rack-mount brackets included; rubber feet for standalone desktop/shelf placement
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Thermal design: Active fan cooling for standard indoor wiring closet ambient environments
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Environmental operating range: 0°C to 45°C (32°F–113°F); storage -25°C to 70°C; relative humidity 10–85% non-condensing
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Safety & EMI certifications: CE, FCC Class A, UL listed, VCCI Class A
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Physical dimensions: 445 mm (W) × 44.5 mm (H, 1RU) × 242 mm (D)
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Unit weight: 3.3 kg (7.3 lbs)
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MAC address table capacity: Up to 8,000 MAC entries
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MTBF: 510,000 hours under standard office operating conditions
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Warranty: Cisco Limited Lifetime Hardware Warranty
4. Layer 2 Switching, QoS & Standard IOS (SI) Feature Set
Core Supported Standard Image Features
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Up to 64 active IEEE 802.1Q tagged VLANs, full VLAN ID range 1–1005, VTP dynamic VLAN synchronization
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IEEE 802.1p CoS QoS with 4 egress priority queues; Strict Priority / WRR scheduling for voice/video/data traffic classification
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IEEE 802.3ad Fast EtherChannel / Gigabit EtherChannel static link aggregation for multi-port copper/fiber trunk bundling
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IEEE 802.1D STP Spanning Tree Protocol + BPDU guard / Root guard to eliminate Layer 2 switching loops
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Port security: Static MAC binding, sticky dynamic MAC learning, port shutdown violation mode
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Broadcast/multicast/unicast storm control to mitigate Layer 2 flooding DoS attacks
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SPAN port mirroring for traffic capture and network fault troubleshooting
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IGMP Snooping v1/v2 to reduce redundant multicast bandwidth consumption for video surveillance streams
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Voice VLAN for automatic classification and priority marking of Cisco IP Phone traffic
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Cisco Switch Clustering for single-pane unified management of multiple clustered switches
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RMON Groups 1,2,3,9 real-time traffic statistics monitoring
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NTP time synchronization for consistent system log timestamps
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CDP Cisco Discovery Protocol for automatic adjacent network device discovery
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Web-based Cisco Cluster Management Suite (CMS) & Cisco Express Setup for zero-CLI initial deployment
Features NOT Supported on Standard SI Image (Exclusive to EI Models)
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IEEE 802.1X port-based authentication, SSHv2 encrypted remote CLI, SNMPv3 secure encrypted monitoring
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Layer 2/Layer 3/Layer 4 access control lists (ACLs), private VLAN edge host isolation
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Ingress port bandwidth rate limiting, time-based ACLs, advanced DSCP multi-layer QoS reclassification
5. Full Management Interfaces
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Local Out-of-Band: RJ45 RS232 serial console port for direct Cisco IOS CLI access without live network connectivity
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Remote CLI: Password-authenticated Telnet command-line management (no SSH support on SI firmware)
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Embedded Web GUI: Browser-based Cisco Cluster Management Suite visual switch manager for port, VLAN and QoS configuration
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SNMP v1/v2c: Standard enterprise monitoring compatible with CiscoWorks, CWSI and third-party NMS platforms
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RMON Traffic Analytics: Built-in bandwidth, error and utilization reporting for fault diagnosis and capacity planning
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Local Storage: 8 MB onboard flash memory to store IOS operating image, startup-config and running-config files
6. Integrated Basic Security Suite
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Multi-level privilege CLI access with encrypted local user password storage
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Port security to restrict unauthorized end-device MAC addresses per access port
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STP BPDU guard and root guard to block rogue unmanaged switches from corrupting Layer 2 topology
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Broadcast storm control to suppress flooding-based denial-of-service threats
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Manual permanent shutdown of unused ports to reduce unauthorized network access attack vectors
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Dedicated management VLAN isolation to segregate switch control plane traffic from end-user data
7. Typical Deployment Scenarios
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Large enterprise multi-building campus access layer switch: 48 Fast Ethernet ports connect mass employee PCs, printers and Cisco IP phones; dual built-in 1000BASE-SX Gigabit fiber uplinks deliver high-bandwidth trunking between separate campus buildings over multimode fiber
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Education campus multi-floor building distribution switch: Cluster multiple WS-C2950SX-48-SI units to scale student workstation port density, native fiber uplinks provide long-distance trunking to campus central data center
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Large regional branch office wiring closet core switch: Fixed fiber uplink design eliminates extra transceiver costs for sites with multimode fiber backhaul to corporate headquarters
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Manufacturing factory main workshop LAN aggregation: Copper ports connect mass HMIs, PLCs and unpowered field sensors; Gigabit SX fiber uplinks extend the factory LAN to remote auxiliary production zones
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Large retail headquarters back-office dense user aggregation: High-density 48-port design for central office staff workstations and POS terminals, built-in fiber uplinks connect to regional store fiber infrastructure
8. Standard Package Contents
1 × Cisco Catalyst WS-C2950SX-48-SI Fast Ethernet Switch (Standard IOS SI Image Preinstalled)
1 × AC power cord
1 × RJ45-to-RS232 console rollover cable
1 × 19-inch 1RU rack mounting bracket kit
Rubber desktop stand feet
Hardware installation guide & Cisco IOS configuration documentation
*External redundant power supply sold separately as optional accessory
Short Commercial Version (For Quotation & Product Catalog)
The Cisco Catalyst WS-C2950SX-48-SI is a legacy 1RU rack-mount fan-cooled Layer 2 managed Fast Ethernet access switch from the Cisco Catalyst 2950 Series, factory preloaded with Standard IOS (SI) baseline feature set, equipped with 48×10/100BASE-TX non-PoE auto-sensing RJ45 copper access ports plus two fixed 1000BASE-SX Gigabit multimode fiber uplink ports, fully fixed copper+Gigabit fiber chassis. It supports Cisco Switch Clustering multi-switch unified management, delivers 13.6 Gbps non-blocking switching capacity, 8K MAC address table, 802.1Q VLAN, 802.1p CoS QoS, IGMP Snooping, STP and port security, without advanced EI security & traffic control functions. High-density 48-port edge switch with native Gigabit multimode fiber uplinks for multi-building campus, large branch and legacy enterprise fiber trunk LAN deployments, covered by Cisco Limited Lifetime Hardware Warranty.
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