Cisco Catalyst WS-C3750G-12S-S Full English Product Description

1. Short Sales Title

2. Official Product Overview

Model Suffix Breakdown

• 3750G: Catalyst 3750 Gigabit stackable multilayer platform, StackWise 32Gbps full-duplex stacking bus, front all-SFP port layout, single fixed power supply (no StackPower redundant power stacking)
• 12: Twelve front-panel hot-swappable SFP Gigabit ports (no copper RJ45 downlinks)
• S: SFP fiber-only port variant; S: IP Base baseline enterprise multilayer IOS firmware (SMI Standard Multilayer Image)

Core IP Base Feature Differentiation vs LAN Base / IP Services

Stacking Architecture

Power & Port Hardware Design

3. Port & Hardware Specifications

• Downlink/Aggregation Ports: 12 × hot-swappable independent SFP Gigabit slots (1000BASE-X: SX/LX/LH/ZX/CWDM/1000BASE-T copper SFP compatible; no RJ45 copper ports)
• Local Out-of-Band Console: RJ45 RS232 serial out-of-band configuration port
• Stack Interfaces: Dual StackWise 32Gbps stacking connectors for stack interconnection
• Stacking: No StackPower redundant power stacking support
• Power Supply: Fixed single 370W AC hot-swap unit; no secondary redundant power slot; input 100–240V AC 50/60Hz; max total power draw 370W
• Front Panel LED Indicators: Per-port link/activity, speed, duplex status; global system fault LED, power status indicator
• Mounting Options: Standard 19-inch 1RU rack-mount brackets included, wall-mount adapter optional, desktop rubber anti-slip feet supplied
• Thermal Design: Variable-speed front-to-back fan cooling; operating temperature 0°C ~ +45°C, storage -25°C ~ +70°C, relative humidity 10–85% non-condensing
• Safety & EMI Certifications: CE, FCC Class A, UL listed, VCCI Class A, RoHS compliant, NEBS Level 3 certified
• Physical Dimensions: 445 mm (W) × 44.5 mm (H, 1RU) × 326 mm (D) / 17.5 × 1.73 × 12.8 inches
• Unit Weight: 3.6 kg (8.0 lbs)
• Memory: 128 MB DRAM, 128 MB onboard flash memory
• Switching Fabric: 32 Gbps full-duplex non-blocking stack-wide capacity
• Forwarding Rate: 17.8 Mpps wire-speed Layer 2 / baseline Layer 3 forwarding for 64-byte packets
• MAC Address Table: Up to 12,000 unicast MAC entries
• Maximum Active VLANs: 1000 active IEEE 802.1Q tagged VLANs (VLAN ID range 1–4094)
• Multicast Groups: 256 IPv4 CGMP snooping groups + PIM stub multicast routing support
• Jumbo Frame Support: Up to 9000 bytes on all SFP Gigabit ports
• MTBF: 180,000 hours under standard office operating conditions
• Warranty: Cisco Standard Limited Lifetime Hardware Warranty (LLW): Next-business-day advance hardware replacement, 90-day complimentary 8×5 TAC technical support

4. Layer 2 + IP Base Baseline Layer 3 IOS Full Feature Set

Core Layer 2 Switching & QoS Core Functions

• Up to 1000 IEEE 802.1Q tagged VLANs, VTPv2 dynamic VLAN synchronization, MSTP 802.1s multiple spanning tree
• Dual trunk encapsulation: Cisco proprietary ISL trunk + IEEE 802.1Q standard trunk on all SFP ports
• IEEE 802.1p CoS / DSCP multilayer QoS, 4 egress priority queues per port; Auto-QoS template dedicated for VoIP voice traffic prioritization
• Gigabit EtherChannel link aggregation (LACP / static mode), up to 8 bundled SFP ports for uplink redundancy and cross-stack load balancing
• Rapid STP (802.1w), UplinkFast, BackboneFast, BPDU Guard, Root Guard to eliminate Layer 2 switching loops
• Port security: Static MAC assignment, sticky dynamic MAC learning, port shutdown violation action
• Per-port broadcast/multicast/unicast storm control to mitigate flooding DoS attacks
• Local SPAN + cross-stack RSPAN port mirroring supported via StackWise stacking
• CGMP (Cisco Group Management Protocol) to suppress redundant multicast flooding to access ports
• Voice VLAN dedicated VoIP separation, Auto QoS automatic voice traffic marking
• Cisco EnergyWise power management to reduce idle endpoint power consumption
• RMON Groups 1,2,3,9 real-time traffic statistics monitoring
• NTP time synchronization, CDP Cisco Discovery Protocol for end-to-end network device visibility
• Embedded web-based Device Manager, Cisco Network Assistant zero-touch stack-wide deployment
• Full IPv6 dual-stack Layer 2 switching: IPv6 Snooping, IPv6 ACL, IPv6 QoS marking, IPv6 neighbor discovery

Exclusive IP Base Baseline Layer 3 Routing Suite Restrictions

• Hardware wire-speed IPv4 inter-VLAN routing via SVI switched virtual interfaces
• Static default route, static prefix routing, RIP v1 / RIP v2 interior gateway protocols
• Limited interior gateway support: EIGRP stub routing only (no full multi-area EIGRP)
• Multicast support: PIM stub multicast routing (no full PIM sparse-dense mode)
• First-hop redundancy protocols: HSRP, VRRP for IPv4 gateway redundancy
• Basic Layer 3 ingress ACL for routed subnet traffic filtering
• Equal-cost multi-path (ECMP) static route load balancing across multiple uplink paths
• No full OSPF / EIGRP / BGP dynamic core routing; no full IPv6 Layer 3 dynamic routing (requires IP Services license upgrade)
• No policy-based routing (PBR) or WCCP web cache redirection

Enterprise Security Feature Suite

• IEEE 802.1X port-based NAC authentication with RADIUS/TACACS+ AAA remote access control
• SSH v2 encrypted CLI management; SNMPv3 secure monitoring (fallback unencrypted Telnet/SNMPv1/v2c available)
• Combined Layer 2 + Layer 3 ingress access control lists for granular inbound traffic filtering
• Time-based ACL policy scheduling for restricted network access hours
• Private VLAN edge isolation to separate host communication within the same broadcast domain
• Per-port bandwidth policing, traffic rate limiting for switched and routed subnets
• DHCP Snooping, Dynamic ARP Inspection (DAI), IP Source Guard to block IP/MAC spoofing attacks
• Encrypted startup-config, password encryption for local administrative credentials

5. Full Management Interfaces

1. Local Out-of-Band: RJ45 RS232 serial console port for offline configuration without network connectivity
2. Secure Remote CLI: SSH v2 encrypted command-line access; fallback unencrypted Telnet
3. Embedded Web GUI: Lightweight browser-based graphical manager for port, VLAN, QoS and uplink configuration
4. SNMP v1/v2c/v3: Compatible with Cisco Prime, DNA Center and third-party network monitoring platforms
5. Local Storage: 128 MB flash memory for IOS image, startup-config and running-config files; no external USB storage port

6. Integrated Security Mitigation Suite

• Multi-level privilege CLI access with encrypted local user password storage
• IEEE 802.1X port authentication to validate endpoints before granting LAN access
• Port MAC address security to restrict unauthorized host connection
• STP BPDU guard and root guard to block rogue switches from altering spanning-tree topology
• Broadcast/multicast storm control to suppress flooding-based denial-of-service threats
• Private VLAN edge to isolate peer hosts on same access VLAN
• DHCP Snooping + DAI ARP Inspection + IP Source Guard to eliminate address spoofing attacks
• 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 traffic

7. Typical Deployment Scenarios

1. Small/Medium Enterprise Stackable Standalone Fiber Aggregation Switch: 12 SFP Gigabit ports build all-fiber core aggregation pods connecting access-layer switches via single/multi-mode fiber; StackWise stacking unifies multiple WS-C3750G-12S-S units into single logical switch for scalable core expansion. IP Base baseline static/RIP/HSRP inter-VLAN routing eliminates dedicated small core router hardware for simple multi-VLAN campus segmentation.
2. Small Multi-Building K-12 Campus Backbone Converged Network: Pure fiber SFP ports link remote classroom stacks to central campus data center backbone; MSTP prevents broadcast loop failures across geographic VLAN domains, flat multi-subnet baseline routing meets entry-level campus backbone requirements without expensive full IP Services license investment.
3. Medium Regional Branch Wiring Closet Main Stackable Multilayer Switch: Universal SFP fiber uplinks connect branch office access switches to corporate headquarters data center via long-distance single-mode fiber; IP Base baseline EIGRP stub + HSRP gateway redundancy satisfies basic enterprise branch multi-VLAN routing and gateway failover compliance without external dedicated router hardware.
4. Small Data Center Top-of-Rack / Aggregation Switch: All-SFP Gigabit ports connect server NIC fiber adapters and SAN edge devices; jumbo frame support optimizes storage and virtualization traffic, stackable architecture enables linear capacity expansion as server count grows.
5. Legacy Distributed Fiber Backbone Network Refresh Hardware: Drop-in stackable pure-Gigabit fiber replacement for older Fast Ethernet aggregation switches, fully compatible with existing SFP fiber trunk infrastructure, adds baseline hardware CEF inter-VLAN routing and StackWise high availability for gradual migration to modern Catalyst 9300 unified aggregation platforms without intermediate core router upgrades.

8. Standard Package Contents

Short Commercial Version (For Quotation & Product Catalog)