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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.
It delivers up to 48 Gbps of line-rate throughput, forwarding packets at full wire speed on all ports simultaneously.
Yes, when paired with a Layer 3-capable supervisor engine and proper IOS feature license, it supports OSPF, EIGRP, BGP, and static routing.
Yes, the module is hot-swappable, allowing installation or removal without powering down the Catalyst 4500 chassis.
Typical power draw is 65 W, with a maximum of 80 W under full load, as documented in Cisco’s line card specifications.
It supports QoS, ACLs, VLANs, Jumbo Frames, IGMP snooping, and advanced security features under the supervisor’s IOS image.
Yes, it supports Stateful Switchover (SSO) and Nonstop Forwarding (NSF) when paired with a redundant supervisor engine.
Power on the chassis, slide the module into an available line-card slot until it latches, then enable ports via the supervisor’s CLI or web interface.
Perform periodic firmware updates on the supervisor engine, clean module air fans, and ensure proper temperature and dust-free environment.
Yes, you can combine it with other Catalyst 4500 line cards, subject to slot numbering, supervisor capacity, and power-budget constraints.
Ideal for enterprise aggregation, data center access, and campus distribution requiring high-density fiber connectivity at Gigabit speeds.
Cisco has designated it as EOS (End of Sale) with limited support; the recommended migration path is to the Catalyst 4500E series with newer line cards.
Software upgrades occur on the supervisor engine via TFTP/FTP or USB; the line card inherits the supervisor’s IOS image automatically.