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by Cisco
Product Line: Cisco Switches
Product Type: WS-X6716-10G-3CXL Switch
Original price $602.00 - Original price $2,001.00
Original price
$602.00 - $2,001.00
Current price $2,001.00
Title: Surplus

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Product Description

The WS-X6716-10G-3CXL is a Cisco networking module featuring 16 GbE ports with X2 optics, designed for high-capacity data throughput with a 40 Gbps switch fabric connection and a 4:1 oversubscription ratio. It is equipped with a DFC3CXL forwarding engine, supporting up to 1 million forwarding entries, and offers advanced queuing mechanisms including CoS and DSCP-based queue mapping, with a scheduler that supports DWRR, WRED (in oversubscription mode), and SRR (in performance mode) at egress. The module provides up to 200 MB per port in performance mode for port buffers, supports jumbo frames up to 9216 bytes, and is compatible with any Cisco Catalyst 6500 E-Series chassis, ensuring high performance and scalability for demanding network environments.

Key Feature for the WS-X6716-10G-3CXL

  • What is the maximum number of Gigabit Ethernet ports available on this device?
    The device offers 16 GbE ports.
  • How does the switch fabric connection rate compare in terms of performance?
    The switch fabric connection operates at 40 Gbps.
  • What is the oversubscription ratio for this hardware?
    The oversubscription ratio is 4:1.
  • Can you explain the functionality of the DFC3CXL in the forwarding engine?
    The DFC3CXL equips the forwarding engine with distributed forwarding capabilities, enhancing its efficiency.
  • How many forwarding entries does it support?
    It supports up to 1 million forwarding entries.
  • What queuing mechanisms are used in this device?
    It employs Class of Service (CoS) based and Differentiated Services Code Point (DSCP) based queue mapping.
  • What is the maximum port density per chassis?
    The maximum port density per chassis is 130 ports for a 9-slot chassis.
  • Describe the supported queuing and scheduling mechanisms.
    The device supports DWRR, WRED (Oversubscription Mode), and SRR at Egress (Performance Mode).
  • What are the port buffer sizes in different modes?
    Port buffers are 90 MB per port group in Oversubscription Mode and 200 MB per port in Performance Mode.
  • What chassis are compatible with this device?
    It is compatible with any Cisco Catalyst 6500 E-Series Chassis.

Product Review

The Cisco WS-X6716-10G-3CXL module provides a high-density 16-port 10GbE solution, equipped with X2 optics and a switch fabric connection of 40 Gbps, designed for the Cisco Catalyst 6500 E-Series chassis, supporting a wide range of Supervisor Engines. With an impressive capability to support up to 1 million forwarding entries and advanced queue mapping and scheduling features, it excels in managing high-volume network traffic efficiently. However, the 4:1 oversubscription rate and the significant power requirement of 487.2 W might limit its application in environments where bandwidth per port and energy efficiency are critical.


The Cisco WS-X6716-10G-3CXL is a high-performance networking module designed for the Cisco Catalyst 6500 E-Series Chassis, providing advanced features for efficient data handling and extensive network scalability. This module comes with 16 Gigabit Ethernet ports, utilizing X2 optics for superior connectivity. It is engineered to support a 40 Gbps switch fabric connection, enhancing the data throughput capabilities of enterprise networks. With an oversubscription ratio of 4:1, the WS-X6716-10G-3CXL ensures balanced performance and bandwidth allocation among connected devices. The module is equipped with the DFC3CXL forwarding engine, enabling distributed forwarding and supporting up to 1 million forwarding entries. This feature significantly improves the speed and efficiency of data processing across the network. The WS-X6716-10G-3CXL offers advanced queuing mechanisms to manage network traffic effectively. It uses Class of Service (CoS) based and Differentiated Services Code Point (DSCP) based queue mapping to prioritize traffic. The module employs a variety of scheduling algorithms, including DWRR, WRED in oversubscription mode, and DWRR, WRED, SRR at egress in performance mode, to ensure smooth traffic flow and reduce congestion. Port buffers on the WS-X6716-10G-3CXL are allocated with 90 MB per port group in oversubscription mode and 200 MB per port in performance mode, providing ample buffer space for data bursts. The module also supports jumbo frames up to 9216 bytes, facilitating efficient large data packet transmission.
  • Maximum port density per chassis reaches 130 ports in a 9-slot chassis, and per Virtual Switching System (VSS) setup, it extends to 260 ports.
  • It is compatible with Cisco Catalyst 6500 Series Virtual Switching Supervisor Engine 720 with 10GE uplinks and Supervisor Engine 720 with any PFC.
  • The module’s onboard memory is 1 GB, ensuring efficient data handling and processing.
Designed for durability and reliability, the WS-X6716-10G-3CXL measures 1.2 x 14.4 x 16 inches and weighs 13 lbs. It operates within a temperature range of 0 °C to 55 °C and can be stored in temperatures from -40 °C to 75 °C. The module's relative humidity tolerance ranges from 10% to 90% (non-condensing), and it can operate at altitudes from –500 to 10,000 feet. Power requirements for the module are 487.2 W, and it includes indicators for status and link monitoring. The Cisco WS-X6716-10G-3CXL stands out for its comprehensive features designed to enhance network performance, scalability, and reliability. Its support for extensive port density, advanced queuing mechanisms, and compatibility with Cisco's leading supervisor engines makes it an essential component for building or upgrading high-performance enterprise networks.


Part Number and ManufacturerCisco WS-X6716-10G-3CXL
Port Count16 Gigabit Ethernet ports
Optical InterfaceX2
Connection to Switch Fabric40 Gigabits per second
Oversubscription Ratio4 to 1
Forwarding ProcessorIncludes DFC3CXL for Enhanced Forwarding Capabilities
Forwarding EntriesSupports up to 1 Million Entries
Queue ManagementMapping based on Class of Service (CoS) and Differentiated Services Code Point (DSCP)
Scheduling AlgorithmsDeficit Weighted Round Robin (DWRR), Weighted Random Early Detection (WRED) in Oversubscription Mode; DWRR, WRED, Strict Priority Queueing (SPQ) at Egress in Performance Mode
Buffer Size90 MB per Port Group in Oversubscription Mode, 200 MB per Port in Performance Mode
Support for Large FramesSupports Frames up to 9216 Bytes
Maximum Ports in a Single Chassis130 Ports in a 9-Slot Chassis
Max Ports in Virtual Switching System (VSS)260 Ports
Compatible Supervisor EnginesVirtual Switching Supervisor Engine 720 with 10GE Uplinks or Supervisor Engine 720 with any Performance Forwarding Card (PFC)
Chassis CompatibilityCompatible with All Cisco Catalyst 6500 E-Series Chassis
Memory on Board1 GB
Dimensions (Height x Width x Depth)1.2 x 14.4 x 16 inches
Unit Weight13 pounds
Operational Temperature Range0 to 55°C
Temperature Range for Storage-40 to 75°C
Humidity Tolerance10% to 90%, non-condensing
Altitude for Operation-500 to 10,000 feet
Power Consumption487.2 Watts
Diagnostic LEDsStatus and Link Activity

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