Cisco Catalyst WS-C3550-48-SMI 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 platform with native hardware CEF Layer 3 routing
• 48: Forty-eight fixed 10/100 Fast Ethernet RJ45 downlink ports, no integrated PoE power circuits
• No PWR suffix: Zero inline PoE power supply
• SMI: Standard Multilayer IOS Image, limited basic IP routing feature set (static routes + RIP v1/v2 only)
• Dual GBIC Gigabit uplink slots, dual ISL proprietary + 802.1Q open-standard trunking support

3. Port & Hardware Specifications

• 48 × 10/100BASE-T RJ45 auto-sensing Fast Ethernet access ports, auto MDI-X, IEEE 802.3x full-duplex flow control, no PoE hardware
• 2 × hot-swappable GBIC Gigabit uplink slots (1000BASE-X), compatible with Cisco GBIC modules: 1000BASE-SX, LX/LH, ZX, 1000BASE-T copper, GigaStack stacking GBIC
• 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; typical power draw 92W; max consumption 98W; rear RPS connector compatible with Cisco RPS 675 external redundant power supply
• Front panel LED indicators: Per-port link/activity, speed, duplex; GBIC media status, stack health, RPS power status, global system fault alarm
• Mounting options: 19-inch 1RU 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) × 44.5 mm (H, 1RU) × 404.6 mm (D)
• Unit weight: 5.6 kg (12.3 lbs)
• MAC address table capacity: Up to 8,000 unicast MAC entries
• Maximum active VLANs: 250 active IEEE 802.1Q tagged VLANs, full VLAN ID range 1–4094
• Multicast Groups: 256 CGMP snooping groups
• MTBF: 183,000 hours under standard office operating conditions
• Warranty: Original Cisco Limited Lifetime Hardware Warranty (EoS, only third-party refurbished hardware support available)

4. Layer 2 + SMI Limited Layer 3 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 both Gigabit uplink ports
• IEEE 802.1p CoS / DSCP multilayer QoS with 4 egress priority queues per port; strict priority scheduling optimized for VoIP voice 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 access ports
• Voice VLAN, Auto QoS for automatic 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 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 initial deployment
• Full IPv6 dual-stack Layer 2 switching: IPv6 Snooping, IPv6 ACLs, IPv6 QoS marking, IPv6 neighbor discovery

Exclusive SMI Standard Multilayer Layer 3 Routing Features (Hardware CEF Accelerated)

• Hardware accelerated IPv4 inter-VLAN routing via SVI (Switched Virtual Interface)
• Static routing, default route support for campus/branch core uplink forwarding
• Interior gateway protocol: RIP v1/v2 only (OSPF, EIGRP, BGP, PIM multicast require EMI upgrade)
• Basic Layer 3 ingress access control lists for routed traffic filtering
• Equal-cost multi-path (ECMP) static route load balancing
• No HSRP/VRRP or multicast routing support in SMI image

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 ingress access control lists (ACLs) for IPv4 and IPv6 granular inbound traffic filtering
• Time-based ACL traffic policies for scheduled network access restrictions
• Private VLAN edge for isolated host segmentation on shared access ports
• Ingress port bandwidth rate limiting, traffic policing and shaping for switched 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 access 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 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. Large enterprise stacked high-density Layer 3 edge switch: 48 Fast Ethernet ports connect employee workstations, office printers and externally powered Cisco IP phones; dual GBIC Gigabit uplinks support fiber or copper trunk connections to building core aggregation switches. GigaStack stacking unifies multiple 3550 switches under one IP address to simplify IT administration, and SMI basic Layer 3 routing eliminates low-cost small router hardware for simple inter-VLAN office segmentation. RPS redundant power eliminates single power failure risks for large multi-floor office zones.
2. K-12 multi-building campus converged network: High 48-port density for student desktops and classroom IP phones; dual GBIC Gigabit uplinks provide redundant trunk links to campus backbone for multimedia teaching traffic. Non-PoE design fits wiring closets away from classroom equipment, MSTP and storm control prevent broadcast loop outages across multi-building VLAN domains.
3. Large regional branch wiring closet main switch: Cost-effective non-PoE hardware eliminates unnecessary PoE power overhead, dual-media GBIC uplinks offer flexible long-distance fiber trunking to corporate headquarters. SMI limited routing feature set satisfies flat multi-VLAN branch network demands without extra EMI license cost.
4. Multi-location retail headquarters aggregation: Mass 48-port Fast Ethernet capacity for POS terminals and administrative desktops; dual Gigabit uplinks deliver trunk failover resilience to retail central data center, fixed single internal power supply suits low-priority non-critical retail network segments.
5. Legacy enterprise flat Layer 2 network refresh: Direct drop-in replacement for aging Catalyst 3500 XL pure Layer 2 switches, fully compatible with existing ISL trunking legacy core infrastructure, supporting gradual migration to modern Catalyst 9000 series hardware while adding basic inter-VLAN routing capability.

8. Standard Package Contents

Short Commercial Version (For Quotation & Product Catalog)