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WS-X4248-RJ21V
Catalyst 4500 48-Port 1000Base-X (SFPs Optional) Base-X GE L...
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WS-X4248-RJ21V is an advanced Ethernet module designed for high-performance networking environments. Built with robust reliability in mind, this unit features an RJ21 connector that enables consistent 1Gbps data rates, making it an excellent choice for mission-critical applications where seamless connectivity is paramount.
Engineered for effortless integration with industry-standard routers and switches, WS-X4248-RJ21V supports TCP/IP protocols and offers a modular form factor that simplifies installation and expansion. Ideal for upgrading server network interfaces and expanding data center capacity, this module delivers essential features like auto-negotiation, jumbo frames, and QoS to optimize network performance.
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In a high-density data center, the WS-X4248-RJ21V Catalyst 4500 48-Port 1000Base-X linecard aggregates 48 server uplinks into a single Gigabit Ethernet backbone. This deployment delivers up to 48 Gbps of non-blocking throughput, reduces switch-to-switch hops, and ensures low-latency packet forwarding. Benefit: Simplified network topology, predictable performance under peak loads, and streamlined management for large-scale server clusters.
For a multi-building university campus, the WS-X4248-RJ21V Catalyst 4500 Base-X linecard provides fiber-ready SFP ports to connect 48 high-bandwidth edge switches to the core. This solution supports long-reach multimode or single-mode links and delivers 1 Gbps per port with modular SFP flexibility. Benefit: Future-proofed bandwidth scalability, resilient ring or mesh topologies, and centralized QoS enforcement for voice, video, and data services.
In a private cloud environment hosting multi-tenant VMs, the WS-X4248-RJ21V linecard enables dedicated 1 Gbps links for each hypervisor, integrated with Catalyst 4500 policy-based VLANs and TrustSec. This setup isolates tenant traffic while maintaining line-rate forwarding across 48 VM hosts. Benefit: Enhanced security through micro-segmentation, guaranteed bandwidth for critical virtual workloads, and simplified compliance monitoring.
To get the detailed certification, please go to the Compliance Center.
 WS-X4248-RJ21V |  WS-X4013+TS |  WS-X4606-X2-E |  WS-X45-SUP6L-E |  WS-X4624-SFP-E | |
|---|---|---|---|---|---|
| Product Type | Network Module | Network Card | Supervisor Engine | Network Module | Network Module / Network Card |
| Module Type | Ethernet | Ethernet | N/A | Ethernet Module | SFP |
| Data Rate | 1Gbps | 10Gbps | 10Gbps | 10Gbps | 1Gbps |
| Connector Type | RJ21 | SFP+ | N/A | SFP+ | SFP |
| Supported Protocols | TCP/IP | TCP/IP / iSCSI | TCP/IP | TCP/IP, iSCSI | TCP/IP |
| Form Factor | Modular | PCIe | Modular | PCIe | Modular |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 55°C |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 70°C |
| Input Voltage | 3.3V | 3.3V | N/A | 3.3V | N/A |
| Compatibility | Cisco | Cisco / Juniper / Arista / Dell / HP | Cisco Catalyst 4500 Series | Cisco, Juniper, Arista, Dell, HP | Cisco Catalyst 4500-E Series |
| Max Speed | 1Gbps | 10Gbps | 10Gbps | 10Gbps | 1Gbps |
| Supported Features | Auto-negotiation, Jumbo Frames, QoS | Auto-negotiation / Wake-on-LAN / Jumbo Frames / QoS | Routing, Switching, QoS, High Availability | Auto-negotiation, Wake-on-LAN, Jumbo Frames, QoS | Auto-negotiation, Jumbo Frames, QoS |
| Power Consumption | 15W | 15W | N/A | 15W | N/A |
| Interface Ports | Ethernet | Ethernet / SFP+ | N/A | Ethernet | SFP |
| Expansion Slots | N/A | N/A | N/A | SFP+ | N/A |
| Product Name | WS-X4248-RJ21V | WS-X4013+TS | WS-X4606-X2-E Enhanced Supervisor Engine | WS-X45-SUP6L-E | Cisco WS-X4624-SFP-E Ethernet Services Module |
| Height | N/A | 1.5 inches | N/A | 0.3 inches | N/A |
| Width | N/A | 3.5 inches | N/A | 4.4 inches | N/A |
| Depth | N/A | 7.0 inches | N/A | 1.7 inches | N/A |
| Weight | N/A | 1.2 lbs | N/A | 1.2 lbs | N/A |
The WS-X4248-RJ21V line card is perfect for high-density environments. It delivers solid, high-speed connectivity and is easy to integrate into our network.
We've had no issues with the WS-X4248-RJ21V. It's a reliable and efficient line card that provides fast, stable performance.
The WS-X4248-RJ21V ensures stable, high-speed performance. It's perfect for our office, supporting multiple devices simultaneously without issues.
The WS-X4248-RJ21V is great for expanding our network. It delivers fast, uninterrupted performance and integrates smoothly.
The WS-X4248-RJ21V provides exceptional value. It offers reliable, high-speed connectivity and is ideal for handling heavy data traffic.
The WS-X4248-RJ21V is a 48-port 1000Base-X Gigabit Ethernet line card for Cisco Catalyst 4500 chassis, supporting optional SFP transceivers for fiber connectivity.
This line card delivers 48 independent Gigabit Ethernet ports over Base-X SFP interfaces.
It supports Cisco SFP modules such as GLC-SX-MMD, GLC-LX-MMD, GLC-ZX-SM, and other Cisco-approved 1000Base-X transceivers.
Compatibility requires Supervisor Engine 6-E, 7-E, or later with required Cisco IOS software and appropriate feature licenses.