Cisco Catalyst 3750 WS-C3750G-24TS-E1U Cisco Catalyst switch

Brand: Cisco | Category: Network Switches

SKU: CSC-WS-C3750G-24TS-E1U | Part #: WS-C3750G-24TS-E1U | MPN: WS-C3750G-24TS-E1U

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When network architects specify switching fabric for enterprise data centres, financial trading floors, or large-scale AI compute clusters, forwarding latency becomes a non-negotiable design parameter. The Cisco Catalyst 3750G WS-C3750G-24TS-E1U delivers wire-rate packet forwarding at 23.8 million packets per second across its 32 Gbps backplane, achieving the deterministic, low-latency performance required in spine-leaf topologies where microsecond delays cascade through entire network stacks. Unlike store-and-forward architectures that introduce variable packet transit times, Cisco's cut-through forwarding on this platform processes frames at the ingress port and begins transmission to the egress port within nanoseconds, making the 3750G suitable for both traditional data-centre oversubription patterns and the demanding timing constraints of high-frequency trading systems that cannot tolerate buffer-induced jitter.

The WS-C3750G-24TS-E1U ships as a 1U rack form factor with 24 Gigabit Ethernet ports (10/100/1000BASE-T) plus four SFP uplink slots for 1000BASE-X connectivity. This port density strikes a practical balance for enterprises building modular switching blocks without consuming excessive cabinet space—a critical concern in co-location facilities and campus networks where real estate costs scale directly with rack units. Cisco's StackWise technology lets network engineers cascade up to nine of these chassis together, creating a unified switching pool with a 32 Gbps stacking bus that synchronises MAC address tables, VLAN configurations, and management state across all members. For network operations teams managing thousands of VLANs or implementing fine-grained traffic segmentation, this approach eliminates the complexity of inter-switch link (ISL) protocols and simplifies failover scenarios where a single logical switch entity can survive member-level hardware faults without requiring manual intervention.

Enterprise network engineers and data-centre operations staff favour the Catalyst 3750G for Layer 2 and Layer 3 hybrid deployments because Cisco ships the unit with IP Services IOS, bundling static routing, OSPF, EIGRP, BGP, and policy-based routing (PBR) in a single image. The 12,000-entry hardware routing table and equivalent MAC address capacity handle mid-to-large campus networks and multi-tenant data-centre fabrics without forcing lookups into DRAM, preserving the forwarding rate across the full range of supported routing protocols. Security operations benefit from hardware-accelerated dynamic ARP inspection, DHCP snooping, IP source guard, and private VLAN support—functions that detect and prevent common Layer 2 attacks (ARP spoofing, DHCP starvation, rogue DHCP servers) without consuming CPU cycles. The platform supports IEEE 802.1x port-based access control and integrates with RADIUS and TACACS+ authentication backends, allowing organisations to enforce user-based network access policies at the switch edge without deploying separate access servers.

Quality-of-service handling on the WS-C3750G-24TS-E1U relies on hardware-based DSCP classification and policing rather than software queuing, ensuring that voice, video, and real-time workloads meet their SLA targets even during network congestion. Each egress port maintains four hardware queues, enabling administrators to allocate guaranteed bandwidth to critical applications while protecting best-effort traffic from starvation during link saturation. The Cisco platform carries native IPv6 dual-stack support alongside full IPv4 routing and stateless firewall capabilities, eliminating the need for parallel network infrastructure in organisations transitioning to IPv6-only or hybrid IPv4/IPv6 addressing schemes. Management occurs through SSH v2 and HTTPS (not Telnet or plain HTTP), SNMP versions 1, 2c, and 3 for monitoring and automation, plus RMON for granular per-port traffic analysis. The unit consumes approximately 65 watts under typical loads, drawing from a universal AC input (100–240V, 50–60 Hz), making it energy-efficient enough for always-on deployment in carrier hotels and remote edge locations where power budgets remain tight.

Our technical team can assess your Layer 2/3 fabric topology, validate stack configurations, and coordinate Cisco support entitlements before deployment. Contact us with your network specifications and quantity requirements to request a formal quote.

Performance Specifications & Stacking Topology

• 24 Gigabit Ethernet (10/100/1000BASE-T) ports plus 4 SFP uplink slots; 32 Gbps switching fabric with 23.8 Mpps forwarding rate
• StackWise stacking bus supports up to 9 chassis (32 Gbps aggregated bandwidth) in a single logical switch for failover resilience and simplified management
• 12,000-entry hardware MAC address table and 12,000-entry IPv4 routing table; supports OSPF, EIGRP, BGP, and static routing without DRAM lookup penalties
• Hardware-based QoS with DSCP classification, marking, and policing; four egress queues per port ensure deterministic latency for critical traffic classes
• IEEE 802.1x, Dynamic ARP Inspection, DHCP Snooping, IP Source Guard, and private VLAN isolation; RADIUS and TACACS+ authentication integration for enterprise access control
• Native IPv6 dual-stack routing and stateless firewall functionality; SNMP v1/v2c/v3 and RMON for network monitoring and automation
• 1U rack-mountable form factor; 65W typical power consumption (AC 100–240V, 50–60 Hz); operating range 0–45°C supports both data-centre and field deployments