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by Cisco
Product Line: Cisco Catalyst
Product Type: Switch
Original price $2,062.00 - Original price $14,506.00
Original price
$2,062.00 - $14,506.00
Current price $14,506.00
Title: Surplus

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Product Description

The WS-X6816-10G-2T is a Cisco networking module featuring 16 GbE ports with X2 optics, designed for high-capacity networking, supporting a switch fabric connection of 40 Gbps and an oversubscription ratio of 4:1. It is equipped with a DFC4 forwarding engine, enabling 256K forwarding entries, and offers advanced queuing mechanisms including Class of Service (CoS) and Differentiated Services Code Point (DSCP) based queue mapping. This module supports a range of supervisor engines, is compatible with any Cisco Catalyst 6500 E-Series Chassis, and provides flexible memory options with 1 GB onboard memory, ensuring efficient data management and networking performance.

Key Feature for the WSX681610G2T

  • What is the number of Gigabit Ethernet (GbE) ports available?
    • This device features 16 GbE ports.
  • Which optics are supported by the switch?
    • It supports X2 optics.
  • How does the switch fabric connection rate compare to the number of ports?
    • The switch fabric connection is 40 Gbps, designed to accommodate the data throughput demands of 16 GbE ports with a 4:1 oversubscription ratio.
  • Describe the forwarding engine technology used.
    • Equipped with DFC4, the device utilizes Distributed Forwarding for efficient packet processing.
  • What is the total number of forwarding entries supported?
    • It supports up to 256K forwarding entries.
  • Can you explain the queuing mechanism utilized by this device?
    • The device employs Class of Service (CoS) and Differentiated Services Code Point (DSCP) based queue mapping for traffic prioritization.
  • What are the available scheduler options?
    • Scheduler options include DWRR and WRED in Oversubscription Mode, and DWRR, WRED, and SRR at Egress in Performance Mode.
  • How do port buffers vary between modes?
    • In Oversubscription Mode, each port group has 90 MB, and in Performance Mode, each port is allocated 256 MB.
  • What is the maximum jumbo frame size supported?
    • Supports jumbo frames up to 9216 bytes.
  • Which supervisor engines are compatible with this hardware?
    • Compatible with Catalyst 6500 Supervisor Engine 2T and 2TXL.

Product Review

The Cisco WS-X6816-10G-2T module, designed for the Catalyst 6500 E-Series chassis, supports up to 16 10GbE ports with X2 optics, providing high-density connectivity options for enterprise networks. It boasts a forwarding engine with DFC4, enhancing distributed forwarding capabilities and supporting up to 256K forwarding entries, ensuring efficient traffic management. However, its 4:1 oversubscription rate may limit performance under high-demand scenarios, and the module's power requirement of 488.5W necessitates careful planning in power-constrained deployments.


The Cisco WS-X6816-10G-2T is a high-performance module designed for the Cisco Catalyst 6500 E-Series Chassis, providing 16 Gigabit Ethernet ports with X2 optics. This module is designed to meet the demands of high-density, high-speed networking, supporting a switch fabric connection of 40 Gbps and an oversubscription ratio of 4:1. It is equipped with a DFC4 for distributed forwarding, enhancing the module's ability to efficiently process data with a forwarding rate that supports up to 256K forwarding entries. This module's advanced queuing mechanisms support both Class of Service (CoS) and Differentiated Services Code Point (DSCP) based queue mapping, ensuring that traffic is prioritized and managed effectively across the network. The scheduler is designed to accommodate various modes, including DWRR and WRED in oversubscription mode, and adds SRR at egress in performance mode, providing flexibility in traffic management and prioritization. One of the key features of the WS-X6816-10G-2T is its port buffer capacity, which varies depending on the operational mode. In oversubscription mode, each port group is allocated 90 MB, while in performance mode, each port receives a significant boost to 256 MB. This ensures that the module can handle large volumes of data without bottlenecking, even in intensive data environments. Additionally, the module supports jumbo frames up to 9216 bytes, allowing for the efficient processing of large data packets. - Maximum port density per chassis reaches 176 ports, and when used within a Virtual Switching System (VSS), it can be doubled to 352 ports. - The module is compatible with Catalyst 6500 Supervisor Engine 2T and 2TXL, ensuring seamless integration and performance within the Cisco ecosystem. - It comes with onboard memory of 1 GB, facilitating advanced networking features and functions without compromising on speed or reliability. The physical dimensions of the WS-X6816-10G-2T are 1.2 inches in height, 14.4 inches in width, and 16 inches in depth, with a weight of 13.6 pounds, making it a compact yet powerful addition to any networking setup. It operates efficiently within a temperature range of 0°C to 55°C and can be stored in temperatures ranging from -40°C to 75°C. Its design also accounts for non-condensing relative humidity levels from 10% to 90% and can function at altitudes up to 10,000 feet. Power consumption is an important consideration, and the WS-X6816-10G-2T requires 488.5 Watts, indicative of its high performance and capability. The module includes status and link indicators, providing immediate visual feedback on the operational status and connectivity of each port. In summary, the Cisco WS-X6816-10G-2T is a powerful network module designed for high-capacity, high-speed networking environments. It offers advanced features, such as high port density, extensive queuing and scheduling options, and significant port buffers, making it an ideal solution for enterprises looking to expand their network's capacity and performance.


Part Number and Manufacturer Cisco WS-X6816-10G-2T
Port Count 16 Gigabit Ethernet
Optical Interface X2
Connection to Switch Fabric 40 Gigabits per second
Oversubscription Ratio 4 to 1
Forwarding Processor Integrated with DFC4 for Enhanced Forwarding
Forwarding Table Capacity 256,000 Entries
Queue Management Mapping based on Class of Service and DSCP
Packet Scheduling Variable by mode: DWRR, WRED (Oversubscription), DWRR, WRED, SRR (Performance)
Memory per Port Group 90 MB (Oversubscription), 256 MB (Performance)
Support for Jumbo Frames Up to 9216 Bytes
Max Ports in a Chassis 176
Max Ports in a VSS Configuration 352
Compatible Supervisor Engines For Catalyst 6500: Supervisor Engine 2T, 2TXL
Chassis Compatibility Cisco Catalyst 6500 E-Series
Built-in Memory 1 GB
Dimensions (H x W x D) 1.2 x 14.4 x 16 inches
Unit Weight 13.6 pounds
Operational Temperature Range 32°F to 131°F
Temperature Range for Storage -40°F to 167°F
Humidity Tolerance (Non-Condensing) 10% to 90%
Maximum Operating Elevation -500 to 10,000 feet
Power Consumption 488.5 Watts
Diagnostic Indicators Status and Link Activity

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