Product Overview
The Extreme 71G21K2L2-48P is a high-performance, Layer 3 managed Ethernet switch designed for demanding enterprise networks and data center environments. As part of the Extreme Networks 7100G-Series, this switch offers a versatile combination of high-density 10/100/1000 PoE+ ports, 10 Gb SFP+ ports, and 40 Gb QSFP+ ports, making it an ideal solution for both edge and core network deployments.
This switch is particularly valuable for its ability to support Power over Ethernet (PoE) on all 48 RJ45 ports, providing up to 30 watts per port, which is essential for powering devices such as IP cameras, VoIP phones, and wireless access points. Its advanced features, including robust Quality of Service (QoS) capabilities and extensive VLAN support, ensure efficient traffic management and network segmentation. The 71G21K2L2-48P also supports various transceiver types, including SFP, SFP+, and QSFP+, offering flexible connectivity options.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | 71G21K2L2-48P |
| Manufacturer | Extreme Networks |
| Product Type | Layer 3 Managed Switch |
| Port Configuration | 48 x 10/100/1000 PoE+ RJ45 ports |
| Switching Capacity | 296 Gbps |
| Forwarding Rate | 220 Mpps |
| MAC Address Table Size | 128K entries |
| VLAN Support | Up to 4094 VLANs |
| Power Supplies | Dual redundant 800W power supplies (ordered separately) |
| Dimensions (H x W x D) | 1.72″ x 17.61″ x 17.086″ (4.37 cm x 44.73 cm x 43.40 cm) |
| Weight | 15.4 lbs (7 kg) |
| Operating Temperature | 5°C to 40°C (41°F to 104°F) |
| Mounting Type | 1 RU rack-mountable |

Key Features and Benefits
The 71G21K2L2-48P stands out for its robust feature set and performance capabilities:
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High-Density PoE+ Ports: With 48 PoE+ ports, this switch can power multiple devices, reducing the need for additional power supplies and simplifying network infrastructure.
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Advanced QoS: Ensures prioritized traffic handling for critical applications, maintaining network performance even under heavy loads.
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Flexible Connectivity: Supports a variety of SFP, SFP+, and QSFP+ transceivers, allowing for both copper and fiber connections.
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Redundant Power Supplies: Dual power supplies enhance reliability and ensure continuous operation in the event of a power supply failure.
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Scalability: The switch can be stacked with other models in the 7100G-Series to create a larger, unified switching fabric.
Application Scenarios
The 71G21K2L2-48P is well-suited for a variety of applications across different industries:
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Enterprise Networks: Ideal for deploying in enterprise LANs, providing high-speed connectivity and PoE capabilities for IP telephony, wireless access points, and other networked devices.
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Data Centers: Its high-density ports and support for 10 Gb and 40 Gb connections make it suitable for data center edge or aggregation layers, ensuring efficient data transfer and scalability.
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Smart Buildings: The switch’s PoE capabilities are perfect for powering IoT devices, such as smart lighting systems and environmental sensors, contributing to intelligent building management.
Related Models
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71G21K2L2-24P24: A 24-port variant with similar features, suitable for smaller-scale deployments.
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71K11L4-48: Another model in the 7100G-Series with a different port configuration, offering additional flexibility.
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71K91L4-48: A high-density switch with 48 ports, designed for core network applications.
Installation and Maintenance
When installing the 71G21K2L2-48P, ensure the environment meets the required temperature and humidity specifications. The switch should be mounted securely in a 1 RU rack to save space and provide proper ventilation. Regular maintenance includes checking the power supplies, fans, and network connections. Utilize the switch’s diagnostic tools and management software for monitoring and troubleshooting.
Product Warranty
The 71G21K2L2-48P comes with a standard warranty, providing coverage for manufacturing defects and ensuring product reliability. Extreme Networks also offers comprehensive support services to assist with any technical issues or inquiries.


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