CBS350-48T-4G-NA Cisco 350 48 Ports Manageable Switch.

Cisco CBS350-48T-4G-NA Managed Gigabit Switch Overview

The Cisco CBS350-48T-4G-NA stands out as a high-efficiency Layer 3–capable managed switch, designed to deliver stable bandwidth, seamless scalability, and superior network orchestration for modern business infrastructures. Its 48 Gigabit Ethernet ports combined with 4 SFP uplinks offer flexible deployment options for expanding networks.

Key Details & Core Attributes

• Manufacturer: Cisco
• Model / SKU: CBS350-48T-4G-NA
• Product Category: Managed Ethernet Switch
• Port Count: 48 Gigabit Ports + 4 SFP Uplink Interfaces

Enhanced Technical Capabilities

Engineered for performance-driven network environments, this switch supports advanced routing, extensive VLAN segmentation, and robust traffic optimization features.

Performance & Throughput

• Switching Capacity: 104 Gbps
• Forwarding Rate (64-byte): 77.38 Mpps
• MAC Address Table Size: 16,000 entries
• Jumbo Frame Handling: Up to 9K bytes; MTU support up to 2K bytes

Port Configuration & Connectivity Flexibility

The CBS350-48T-4G-NA ensures seamless data-transfer efficiency across all ports, enabling reliable connectivity for growing office networks, enterprise floors, and large-scale deployments.

• 48 × 10/100/1000 Gigabit Ethernet ports
• 4 × SFP uplinks for extended fiber networking
• No PoE (ideal for non-powered devices or PoE-free environments)
• Link Aggregation: Supports up to 8-unit stacking

Advanced Layer 3 & Routing Functions

• IPv4 Static Routes: Up to 990
• IP Interfaces: Supports 128
• IGMP v1/v2/v3 multicast management: Up to 2,000 groups
• ACL Support: 1,024 rules for granular security control

Efficient Network Optimization

QoS & Traffic Prioritization

With built-in QoS (802.1p) mechanisms, this switch ensures smooth prioritization of voice, video, and mission-critical traffic flows.

• Voice VLAN with automated QoS assignment
• Optimized latency control for business-critical applications

Memory, Processor & Internal Resources

• CPU: 800 MHz ARM processor
• System Memory: 512 MB RAM
• Flash Storage: 256 MB

Design, Build & Physical Dimensions

• Width: 445 mm
• Depth: 273 mm
• Height: 44 mm (1U rack-mountable form factor)

Cisco CBS350-48T-4G-NA 350 48 Ports 2 Layer Ethernet Switch

The Cisco CBS350-48T-4G-NA 350 48 Ports Manageable 2 Layer Supported Ethernet Switch represents a balanced combination of enterprise-class features and small-to-medium business-friendly simplicity. Designed to deliver robust switching performance across 48 Gigabit Ethernet ports with four SFP uplinks, this managed switch brings advanced layer 2 functionality, a straightforward management experience, and the reliability you expect from Cisco’s business switching portfolio. The CBS350-48T-4G-NA is positioned to serve converged networks that carry data, voice, and video across campus access layers, branch offices, retail deployments, and professional workspaces where predictable performance and secure connectivity matter.

Design and hardware characteristics

The CBS350-48T-4G-NA features a full 1U rack-mountable chassis engineered for dense port deployments while maintaining efficient thermal and acoustic profiles suitable for equipment closets and small wiring rooms. Forty-eight fixed 10/100/1000BASE-T ports provide ubiquitous copper connectivity for desktops, IP phones, wireless access points, cameras, and other edge devices. Four small form-factor pluggable (SFP) uplink slots support fiber connectivity for long-distance aggregation or for linking to distribution switches. The hardware design emphasizes predictable throughput and low-latency switching across all ports while supplying essential management interfaces such as a dedicated console port and out-of-band management for separation of control traffic in critical installations.

Port layout and physical footprint

Physically the switch’s 48-port copper layout is complemented by the SFP uplinks, enabling administrators to mix copper and fiber connectivity without additional modules. Rack ears and a 1U height allow integration into standard 19-inch racks, and the chassis depth is chosen to fit shallow racks commonly found in branch and small office environments. Front-facing LEDs provide port status, link speed, and activity indicators that accelerate hands-on troubleshooting and reduce mean time to repair for cabling or device issues.

Power, thermal, and acoustics

Powering options and thermal management for the Cisco CBS350-48T-4G-NA are engineered to balance energy efficiency and cooling. The internal power supply is sized for the switch’s port count and switching capacity, yielding consistent operation under full load. The fan system is tuned to maintain safe operating temperatures while minimizing noise, which is especially important when the switch is deployed in smaller office or classroom environments. Power consumption characteristics make the switch suitable for deployments where energy cost and heat dissipation are considerations, and the device supports graceful power-up sequencing to protect attached endpoints.

Layer 2 functionality and switching intelligence

At its core the Cisco CBS350-48T-4G-NA is a layer 2 managed switch offering a rich set of Ethernet features that support modern converged networks. The switch implements hardware-based MAC address learning and forwarding to ensure high throughput. VLAN support with advanced VLAN tagging and segmentation capabilities allows administrators to isolate traffic streams for security and performance. Inter-VLAN routing options and static routing capabilities help reduce the need for separate router appliances in small deployments, improving performance for intra-network traffic while simplifying the network architecture.

VLANs, QoS, and traffic management

Built-in virtual LAN support enables granular segmentation of users and devices. Quality of Service configuration empowers administrators to prioritize latency-sensitive traffic such as voice over IP and real-time video streams, ensuring predictable quality for business-critical applications. The CBS350 family’s QoS model includes classification, marking, queuing, and rate limiting to shape traffic both inbound and outbound on each port. Administrators can apply policies that maintain a high quality of experience for collaboration tools while preventing any single device from consuming disproportionate bandwidth on the access layer.

Link aggregation and redundancy

To scale bandwidth between the access layer and aggregation layer the Cisco CBS350-48T-4G-NA supports link aggregation groups. These groups combine multiple physical uplinks into a single logical link for increased throughput and redundancy. Link state and failover behavior are tailored to keep traffic flowing when individual links fail, enabling higher availability between switches and critical servers. The switch’s support for spanning tree protocol variants minimizes network loops while enabling rapid convergence for topology changes, further increasing network resilience.

Security features and access control

Security is a priority in the CBS350-48T-4G-NA design, offering multiple defense layers that protect the network from unauthorized access and common threats at the access layer. Port-level security features restrict access to known devices based on MAC address or authentication policies. 802.1X integrates with RADIUS servers to provide per-user authentication and dynamic VLAN assignment for stronger identity-based access control, making it practical to enforce endpoint policies for employees, guests, and IoT devices without manual intervention.

ACLs, storm control and DHCP snooping

Access control lists allow administrators to control traffic flows between VLANs and to enforce role-based policies that limit unnecessary lateral movement by endpoints. DHCP snooping and dynamic ARP inspection are used to detect and prevent spoofing attacks that commonly target layer 2 networks. Storm control mechanisms protect the network against broadcast, multicast, or unicast traffic storms that could degrade performance, ensuring that accidental or malicious traffic surges do not overwhelm switching resources.

Security policy enforcement and monitoring

Integrated logging and monitoring features provide visibility into security events and policy violations. The switch can export syslog entries and SNMP traps to centralized monitoring systems, enabling security teams to correlate events across the infrastructure. Role-based administration and secure management channels, including HTTPS and SSH, ensure that management operations are protected and that operational separation of duties can be implemented in multi-administrator environments.

Management, observability, and lifecycle operations

One of the defining characteristics of the CBS350-48T-4G-NA is its emphasis on accessible management and operational simplicity for IT teams of all sizes. The switch supports a modern, web-based graphical user interface that surfaces configuration options and status at-a-glance through dashboards. For environments that demand automation and scale, support for command-line interface scripting, SNMP management, and integration with network management platforms enables administrators to centralize firmware updates, configuration backups, and systematic provisioning.

Web GUI, CLI and programmability

Administrators benefit from the GUI for routine tasks and visual troubleshooting, while the CLI remains available for precise control and automation. API-driven workflows and standard management protocols allow the CBS350 to fit into Infrastructure-as-Code pipelines and monitoring solutions, streamlining tasks such as mass configuration changes and bulk firmware management. Audit trails and configuration change history features aid in compliance and troubleshooting activities, reducing operational risk when multiple engineers modify the network.

Diagnostics, monitoring, and performance counters

Comprehensive diagnostic tools are built into the switch, including cable diagnostics, port mirroring for traffic analysis, and per-port counters that surface utilization and error statistics. These observability tools accelerate root cause analysis for connectivity issues, congestion hotspots, and misconfigurations. When combined with remote monitoring systems, the switch’s telemetry data becomes a valuable input for capacity planning and proactive maintenance, allowing IT teams to avoid service degradation before users are impacted.

Performance, capacity, and throughput

Performance metrics for the Cisco CBS350-48T-4G-NA are aligned with the needs of dense access deployments. The switch is designed to forward traffic at wire speed across all ports, reducing latency and buffering for demanding applications. Backplane switching capacity and forwarding rates are specified to ensure consistent performance when the switch is fully populated, making it a dependable platform for environments that see simultaneous streaming, file transfers, and interactive sessions. Traffic shaping and scheduling features further help preserve performance for priority services while allowing best-effort traffic to use remaining bandwidth.

Scalability considerations

Scalability is addressed through the switch’s uplink architecture and support for hierarchical network designs. The four SFP ports allow for fiber links to higher capacity distribution switches or to network aggregation points, enabling growth without replacing the access layer. Link aggregation and VLAN scaling help stretch performance across multiple devices, and the switch’s memory and table capacities are selected to support thousands of MAC addresses and extensive VLAN configurations typical of larger small enterprise deployments.

Deployment scenarios and use cases

The Cisco CBS350-48T-4G-NA is ideal for a variety of real-world deployments. In an office environment it provides ample copper ports for workstations and telephony endpoints, combined with the QoS and security needed for unified communications. For branch and retail locations, the switch supplies a stable foundation for POS systems, surveillance cameras, and wireless access points while enforcing network segmentation for PCI and privacy compliance. Educational campuses and labs benefit from the hardware’s noise profile and dense port count, enabling teachers and students to access digital resources reliably. Professional services and managed service providers find value in the device’s managed features, which simplify remote troubleshooting and the consistent application of network policies across multiple sites.

Small and medium enterprise convergence

When voice, video, and data converge on the same access network, the CBS350-48T-4G-NA helps maintain predictable service levels. The combination of QoS, VLAN segmentation, link aggregation, and layer 2 features reduces the need for specialized appliances at the access layer and simplifies cabling topology. This makes the switch especially effective in environments where IT teams operate with constrained resources, as the device reduces complexity while maintaining the flexibility to support modern business applications.

Edge and IoT-ready access layer

With increasing numbers of IoT devices and physical security endpoints connecting to enterprise networks, the CBS350-48T-4G-NA provides mechanisms for segregating and securing these devices. Network segmentation, port-security, and 802.1X authentication allow administrators to create controlled access domains for building management systems, cameras, and sensors. These features reduce attack surface and enable tailored monitoring of IoT traffic patterns without impacting core business services.