Cisco Catalyst WS-C2950G-12-EI Full English Product Description

1. Short Sales Title (For Quotation & E-commerce Listing)

Cisco WS-C2950G-12-EI 1RU Rack-Mount Modular Layer 2 Fast Ethernet Access Switch, 12×10/100BASE-TX RJ45 Access Ports, 2 Hot-Swappable GBIC Gigabit Uplink Slots, Preloaded Enhanced IOS Image (EI), Cisco Switch Clustering Supported, Wire-Speed QoS, Full 802.1X, SSH, ACL & Advanced Security, Flexible Fiber/Copper Gigabit Uplink Expansion, Ideal for Small Office, Classroom, Compact Branch & Legacy Enterprise Modular Backbone Deployments

2. Official Product Overview

The Cisco Catalyst WS-C2950G-12-EI belongs to the legacy Catalyst 2950G intelligent edge switch family, a compact modular managed Layer 2 switch designed for small-scale workgroup access with flexible field-upgradable Gigabit uplink options via GBIC transceivers. Differentiated from fixed-uplink 2950 variants, this model features two empty GBIC slots to support 1000BASE-SX, LX, LH, ZX, and 1000BASE-T copper GBIC modules, allowing customers to select fiber or copper Gigabit trunking based on campus distance requirements. The suffix -EI denotes factory pre-installed Enhanced IOS Image, unlocking the full suite of advanced enterprise security, authentication, traffic control and management features unavailable on Standard Image (SI) models.

Model Suffix Breakdown

2950G: Catalyst 2950 modular GBIC uplink platform
12: Twelve fixed 10/100 auto-negotiate RJ45 copper downlink access ports
G: Two empty hot-swappable GBIC modular Gigabit uplink expansion slots
EI: Enhanced IOS Image with complete advanced Layer 2 security, QoS, AAA and ACL functionality

This compact 1U metal rack-mount chassis integrates internal autoranging AC power supply and built-in 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 without separate management IPs. All RJ45 ports support auto-negotiation (10/100 speed, half/full duplex) and auto MDI-X to eliminate crossover cable requirements. Hot-swappable GBIC slots support live transceiver replacement without full switch power cycle for minimal network downtime.

Equipped with 16 MB DRAM, 8 MB flash memory and shared packet buffer memory, the WS-C2950G-12-EI delivers 6.4 Gbps non-blocking switching capacity and 4.8 Mpps wire-speed forwarding rate for 64-byte frames, supporting lossless concurrent voice, video and data traffic across all 12 copper access ports and dual Gigabit uplinks. It adopts store-and-forward switching architecture to filter corrupted frames and prevent broadcast domain flooding.

3. Port & Hardware Specifications

12 × 10/100BASE-TX RJ45 auto-sensing copper access ports, auto MDI-X, IEEE 802.3x full-duplex flow control
2 × hot-swappable 1000BASE-X GBIC uplink slots, compatible with full Cisco GBIC lineup: SX, LX, LH, ZX, 1000BASE-T copper GBIC
1 × RJ45 RS232 serial console port for out-of-band CLI configuration
Modular uplink design, no fixed fiber/copper uplink ports
Stacking capability: Cisco Switch Clustering via Fast Ethernet or Gigabit GBIC trunk links
Power supply: Internal fixed autoranging AC input (100–240 VAC 50/60 Hz), max power consumption 30W
Rear RPS connector: Compatible with optional Cisco external redundant power supply for power failure resilience
Front panel LED indicators: Per-port link/activity, speed, duplex; GBIC slot status, system status, RPS power status
Mounting options: 19-inch 1RU rack-mount brackets included; rubber feet for standalone desktop placement
Thermal design: Active fan cooling for standard wiring closet ambient environments
Environmental operating range: 0°C to 45°C (32°F–113°F); storage -25°C to 70°C; relative humidity 10–85% non-condensing
Safety & EMI certifications: CE, FCC Class A, UL listed, VCCI Class A
Physical dimensions: 445 mm (W) × 44.5 mm (H, 1RU) × 242 mm (D)
Unit weight: 3.0 kg (6.6 lbs)
MAC address table capacity: Up to 8,000 MAC entries
MTBF: 520,000 hours under standard office operating conditions
Warranty: Cisco Limited Lifetime Hardware Warranty

4. Layer 2 Switching, QoS & Enhanced IOS (EI) Full Feature Set

Core Base Switching & QoS Features

Up to 64 active IEEE 802.1Q tagged VLANs, full VLAN ID range 1–1005
IEEE 802.1p CoS QoS with 4 egress priority queues; Strict Priority / WRR scheduling for voice/video/data classification
IEEE 802.3ad Fast EtherChannel / Gigabit EtherChannel static link aggregation for multi-port copper/GBIC trunk bundling
IEEE 802.1D STP Spanning Tree Protocol + BPDU guard / Root guard to eliminate Layer 2 switching loops
Port security: Static MAC binding, sticky dynamic MAC learning, port shutdown violation mode
Broadcast/multicast/unicast storm control to mitigate Layer 2 flooding DoS attacks
SPAN port mirroring for traffic capture and network fault troubleshooting
IGMP Snooping v1/v2 to reduce redundant multicast bandwidth consumption for video streams
Voice VLAN for automatic classification and priority marking of Cisco IP Phone traffic
Cisco Switch Clustering for single-pane unified management of multiple clustered switches
RMON Groups 1,2,3,9 real-time traffic statistics monitoring
NTP time synchronization for consistent system log timestamps
CDP Cisco Discovery Protocol for automatic adjacent network device discovery
Web-based Cisco Device Manager & Cisco Express Setup for zero-CLI initial deployment

Exclusive Advanced EI Security & Traffic Features (Not Supported on SI Images)

IEEE 802.1X port-based authentication with RADIUS/TACACS+ AAA remote access control
SSHv2 encrypted remote CLI management; SNMPv3 secure encrypted monitoring
Layer 2/Layer 3/Layer 4 access control lists (ACLs) for granular inbound traffic filtering
Private VLAN edge for isolated host segmentation on shared access ports
Ingress port bandwidth rate limiting for traffic shaping and bandwidth governance
Time-based ACLs for scheduled differentiated network access policies
DSCP marking and multi-layer advanced QoS reclassification for converged voice/data networks

5. Full Management Interfaces

Local Out-of-Band: RJ45 RS232 serial console port for direct Cisco IOS CLI access without live network connectivity
Secure Remote CLI: SSHv2 encrypted command-line access; fallback password-authenticated Telnet
Embedded Web GUI: Browser-based visual switch manager for port, VLAN and QoS configuration
SNMP v1/v2c/v3: Standard enterprise monitoring compatible with CiscoWorks, CWSI and third-party NMS platforms
RMON Traffic Analytics: Built-in bandwidth, error and utilization reporting for fault diagnosis and capacity planning
Local Storage: 8 MB onboard flash memory to store IOS operating image, startup-config and running-config files

6. Integrated Enhanced Security Suite

Multi-level privilege CLI access with encrypted local user password storage
IEEE 802.1X port authentication to validate end-user devices before granting network access
Port security to restrict unauthorized end-device MAC addresses per access port
STP BPDU guard and root guard to block rogue unmanaged switches from corrupting Layer 2 topology
Broadcast storm control to suppress flooding-based denial-of-service threats
Private VLAN edge to isolate connected endpoints from each other on shared switch ports
SSHv2 and SNMPv3 encryption to secure remote switch management traffic over the LAN
Manual permanent shutdown of unused ports to reduce unauthorized network attack vectors
Dedicated management VLAN isolation to segregate switch control plane traffic from end-user data

7. Typical Deployment Scenarios

Small enterprise compact wiring closet access switch: 12 Fast Ethernet ports connect employee PCs, printers and Cisco IP phones; dual GBIC slots support flexible Gigabit fiber or copper uplinks to building core switches
Education classroom & lab networking: Clustered multiple WS-C2950G-12-EI units scale student workstation port density, GBIC transceivers provide long-distance fiber trunking to campus distribution layer
Small remote branch office core switch: Modular GBIC uplinks adapt to multimode/single-mode fiber or copper Gigabit trunking back to regional headquarters
Auxiliary factory control room LAN aggregation: Copper ports connect HMIs, PLCs and unpowered field sensors; GBIC fiber uplinks extend the network to remote production zones
Small retail back-office aggregation: Compact 12-port footprint for limited rack space, modular Gigabit uplinks connect to retail regional headquarters over campus fiber

8. Standard Package Contents

1 × Cisco Catalyst WS-C2950G-12-EI Modular Fast Ethernet Switch (Enhanced IOS EI 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

*GBIC transceivers and external redundant power supply sold separately as optional accessories

Short Commercial Version (For Quotation & Product Catalog)

The Cisco Catalyst WS-C2950G-12-EI is a legacy 1RU rack-mount fan-cooled modular Layer 2 managed Fast Ethernet access switch from the Cisco Catalyst 2950 Series, factory preloaded with Enhanced IOS (EI) full advanced feature set, equipped with 12×10/100BASE-TX non-PoE auto-sensing RJ45 copper access ports plus two hot-swappable GBIC Gigabit uplink expansion slots for flexible fiber/copper backbone connectivity. It supports Cisco Switch Clustering multi-switch unified management, delivers 6.4 Gbps non-blocking switching capacity, 8K MAC address table, 802.1Q VLAN, 802.1p CoS QoS, IGMP Snooping, STP, port security, 802.1X authentication, SSHv2 and full multi-layer ACL filtering. Compact modular Gigabit uplink switch for small office, classroom and compact branch enterprise LAN deployments, covered by Cisco Limited Lifetime Hardware Warranty.


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