Cisco Catalyst WS-C3550-12G Full English Product Description

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

2. Official Product Overview

Model Suffix Breakdown

• 3550: Catalyst 3550 intelligent multilayer stackable switch series, native hardware Layer 3 routing
• 12G: 12 total Gigabit ports; 10 GBIC modular slots + 2 fixed Gigabit copper ports; G = all Gigabit-only backbone design
• No PoE suffix: Zero inline PoE power circuits, pure aggregation backbone purpose
• Implied default image suffix -EMI: Enhanced Multilayer IOS with full IP routing feature set

3. Port & Hardware Specifications

• 10 × Hot-swappable GBIC Gigabit Ethernet slots (1000BASE-X), compatible with Cisco GBIC modules: 1000BASE-SX, LX/LH, ZX, CWDM, 1000BASE-T copper, GigaStack stacking GBIC
• 2 × Fixed 10/100/1000BASE-T RJ45 auto-sensing Gigabit copper ports, auto MDI-X, IEEE 802.3x full-duplex flow control
• Local Out-of-Band Console: 1×RJ45 RS232 serial console port; no Mini-USB / front USB storage port
• Stacking: GigaStack GBIC stacking, maximum 9 Catalyst 3550 switches per cluster, single unified IP cluster management, Cross-Stack UplinkFast (CSUF) sub-second convergence
• Power architecture: Fixed internal AC power supply, input 100–240 VAC autoranging 50/60Hz; max total system power consumption 190W; rear RPS connector compatible with Cisco RPS 300 external redundant power supply
• Front panel LED indicators: Per-port link/activity, duplex, speed; GBIC media type indicator, stack link health, dual power (local + RPS) status, global system fault alarm
• Mounting options: 19-inch 1.5RU rack-mount brackets included; desktop rubber anti-slip feet supplied
• Thermal design: Variable-speed active fan cooling
• 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, RoHS compliant
• Physical dimensions: 445 mm (W) × 67 mm (H, 1.5RU) × 404.6 mm (D)
• Unit weight: 7.3 kg (16.1 lbs)
• MAC address table capacity: Up to 12,000 unicast MAC entries
• Maximum active VLANs: 250 active IEEE 802.1Q tagged VLANs, full VLAN ID range 1–4094
• Multicast Groups: 1024 CGMP snooping groups
• MTBF: 110,332 hours under standard operating conditions
• Warranty: Original Cisco Limited Lifetime Hardware Warranty (EoS, only third-party refurbished support available)

4. Layer 2 + Layer 3 Multilayer EMI IOS Full Feature Set

Core Layer 2 Switching & QoS Core Functions

• Up to 250 active IEEE 802.1Q tagged VLANs, VTPv2 dynamic VLAN synchronization, MSTP 802.1s multiple spanning tree
• Dual trunking standards: Cisco proprietary ISL trunking + IEEE 802.1Q open-standard trunking on all Gigabit ports
• IEEE 802.1p CoS / DSCP multilayer QoS with 4 egress priority queues per port; strict priority scheduling optimized for VoIP voice and video traffic
• Gigabit EtherChannel link aggregation, up to 8-port bundled trunking for fault tolerance and aggregated backbone bandwidth
• IEEE 802.1D STP + Rapid STP (802.1w), UplinkFast, BackboneFast, BPDU guard, root guard to eliminate Layer 2 switching loops
• Cross-Stack UplinkFast (CSUF) for sub-second convergence across stacked switch topologies
• Port security: Static MAC binding, sticky dynamic MAC learning, port shutdown violation mode
• Per-port broadcast/multicast/unicast storm control to mitigate Layer 2 flooding DoS attacks
• Local SPAN port mirroring + cross-stack RSPAN remote span for multi-switch traffic capture and troubleshooting
• Cisco CGMP (Cisco Group Management Protocol) to suppress unnecessary multicast flooding to edge ports
• Voice VLAN, Auto QoS for Cisco IP Phone traffic priority marking
• GigaStack stacking management: Single IP cluster administration for up to 9 stacked switches
• Cisco EnergyWise power management (non-PoE backbone limited feature set)
• RMON Groups 1,2,3,9 real-time traffic statistics monitoring
• NTP time synchronization for consistent system log timestamps
• CDP Cisco Discovery Protocol for end-to-end network device visibility
• Web-based embedded Device Manager & Cisco CMS Cluster Management Suite for zero-touch deployment
• Full IPv6 dual-stack Layer 2 switching: IPv6 Snooping, IPv6 ACLs, IPv6 QoS marking, IPv6 neighbor discovery

Exclusive EMI Layer 3 Routing Features (Not Available on Standard Layer 2 IOS)

• Hardware accelerated IPv4 / IPv6 inter-VLAN routing via SVI (Switched Virtual Interface)
• Static routing, default route support for campus/branch core uplink forwarding
• Interior gateway protocols: RIP v1/v2, OSPF stub, EIGRP, EIGRPv3 stub for IPv6
• First-hop redundancy protocols: HSRP, VRRP for IPv4 and IPv6
• PIM sparse/dense mode multicast routing
• Layer 3 ingress / egress access control lists for routed traffic filtering
• Equal-cost multi-path (ECMP) routing for Layer 3 load balancing
• Layer 3 port security and traffic policing for routed edge traffic

Enterprise Advanced Security Features

• IEEE 802.1X port-based NAC authentication with RADIUS/TACACS+ AAA remote access control
• SSHv2 encrypted remote CLI management; SNMPv3 secure encrypted monitoring (unencrypted Telnet/SNMPv1/v2c available as fallback)
• Combined Layer 2 + Layer 3 ingress access control lists (ACLs) for granular inbound traffic filtering
• Time-based ACL traffic policies for scheduled network access restrictions
• Private VLAN edge for isolated host segmentation on shared backbone ports
• Ingress port bandwidth rate limiting, traffic policing and shaping for both switched and routed traffic
• DHCP Snooping + Dynamic ARP Inspection (DAI) + IP Source Guard to mitigate IP/MAC address spoofing attacks
• Encrypted local user passwords and encrypted startup-config file storage

5. Full Management Interfaces

1. Local Out-of-Band: RJ45 RS232 serial console port for direct CLI access without live network connectivity
2. Secure Remote CLI: SSHv2 encrypted command-line access; fallback password-authenticated Telnet
3. Embedded Web GUI: Lightweight browser-based Cisco Device Manager & CMS Cluster Manager for port, VLAN, QoS and stacking configuration panel
4. SNMP v1/v2c/v3: Encrypted/unencrypted enterprise monitoring compatible with Cisco Prime, DNA Center and third-party NMS platforms
5. Local Storage: 16 MB onboard flash memory to store IOS operating image, startup-config and running-config files (encrypted config storage; no external USB backup port)

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 LAN 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 backbone ports
• 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 GBIC slots and copper ports to reduce unauthorized network attack vectors
• Dedicated management VLAN isolation to segregate switch control plane traffic from end-user data
• No PoE hardware, so no PoE overload protection logic required

7. Typical Deployment Scenarios

1. Medium Enterprise Collapsed Core Backbone Aggregator: 12 Gigabit ports aggregate uplinks from multiple Catalyst 3550 Fast Ethernet access switch stacks via fiber SX/LX transceivers; single IP cluster management unifies all edge and backbone switches for simplified IT administration. RPS redundant power eliminates single power failure points for core campus traffic, and native Layer 3 routing replaces standalone small routers for inter-VLAN campus segmentation.
2. Small Server Farm Aggregation Switch: All Gigabit ports connect directly to file servers, database servers and storage arrays using 1000BASE-T copper GBICs; EtherChannel trunking bundles multiple server links for high-bandwidth fault-tolerant data center connectivity, hardware Layer 3 routing enables server subnet isolation without external routers.
3. Stacked Access Switch Uplink Concentrator: Deployed in central multi-floor wiring closets to consolidate uplinks from multiple building access switch stacks via GigaStack GBIC stacking modules, reducing core router port consumption and simplifying Layer 3 inter-VLAN routing across building floors.
4. Legacy Network Refresh Secondary Multilayer Backbone: Used as low-cost secondary aggregation hardware for aging Catalyst 3500 XL access networks, supporting existing ISL trunking deployments during gradual migration to modern Catalyst 9000 series hardware, built-in Layer 3 routing eliminates extra router hardware investment.

8. Standard Package Contents

Short Commercial Version (For Quotation & Product Catalog)