Cisco Catalyst WS-C3550-48-EMI 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 inline PoE power circuits
• No PWR suffix: Zero PoE power supply built in
• EMI: Enhanced Multilayer IOS Image, full enterprise Layer 3 routing, multicast and security feature set (SMI only supports static + RIP basic routing)
• 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
• 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 total power consumption 190W; 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: 7.2 kg (16.0 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 Routes: Up to 2,000 multicast routing entries
• Unicast Layer 3 CEF Routes: Up to 16,000 IPv4 routing entries
• 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 + Full EMI Multilayer 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 EMI Enhanced Multilayer Layer 3 Routing Features (Not Included in SMI)

• Hardware accelerated IPv4 / IPv6 inter-VLAN routing via SVI (Switched Virtual Interface)
• Static routing, default route support for campus/branch core uplink forwarding
• Complete interior gateway protocols: RIP v1/v2, OSPF, EIGRP, EIGRPv3 for IPv6
• Exterior gateway protocol: BGPv4 for IPv4 inter-domain routing
• Multicast routing suite: PIM sparse/dense mode, DVMRP tunneling
• First-hop redundancy protocols: HSRP, VRRP for IPv4 and IPv6
• Policy-Based Routing (PBR) for flexible traffic steering
• WCCP v2 web cache redirection support
• 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 access 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 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 full-feature Layer 3 edge switch: 48 Fast Ethernet ports connect employee workstations and externally powered Cisco IP phones; dual dual-rate GBIC Gigabit uplinks provide fiber trunk connections to building core aggregation switches. GigaStack stacking unifies multiple 3550 switches under one IP address to simplify IT administration, and full EMI Layer 3 routing (OSPF/EIGRP/BGP/HSRP) eliminates standalone router hardware for multi-subnet campus segmentation. RPS redundant power eliminates single power failure risks for multi-floor office zones.
2. K-12 multi-building campus converged network: Non-PoE design fits student desktop and classroom IP phone deployments; dual Gigabit GBIC uplinks provide redundant trunk links to campus backbone for IPTV multimedia teaching traffic. Full PIM multicast routing optimizes video broadcast delivery, MSTP and storm control prevent broadcast loop outages across multi-building VLAN domains.
3. Large regional branch wiring closet core switch: Universal non-PoE access ports for branch office workstations and VoIP phones; dual-media GBIC uplinks support long-distance fiber trunking to corporate headquarters. EMI full routing suite enables multi-subnet branch design with HSRP gateway redundancy, meeting enterprise branch security and routing compliance requirements.
4. Multi-location retail headquarters aggregation: Mass 48-port Fast Ethernet capacity for POS terminals and administrative desktops; dual SFP/SFP+ uplinks deliver redundant 10G trunk failover paths to retail central data center, dual redundant power protects payment and surveillance business systems from power feed failure.
5. Legacy enterprise full network refresh secondary edge hardware: Drop-in replacement for aging Catalyst 3500 XL pure Layer 2 switches, fully compatible with existing ISL trunking legacy core infrastructure, equipped with complete Layer 3 routing to support gradual migration to modern Catalyst 9000 series hardware without intermediate router upgrades.

8. Standard Package Contents

Short Commercial Version (For Quotation & Product Catalog)