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by Cisco
Product Line: Cisco DWDM
Product Type: XFP transceiver
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Title: Surplus

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Product Description

The DWDM-XFP-56.55 is designed for 10 Gigabit Ethernet ports with a wavelength of 1556.55 nm and operates on a 100 GHz frequency grid, aligned with ITU Channel 26. It is compatible with Cisco Catalyst 6503-E, 6504, and 6504-E switches and requires Cisco IOS® Software Release 12.2(33)SXJ1 or later, supporting up to 96,000 MAC addresses and offering 512 MB of packet memory for efficient data buffering. This module is engineered to fit into a single slot of a Cisco Catalyst 6500 Series Switch, ensuring seamless integration with existing network infrastructure while providing reliable performance across operating temperatures ranging from 0 °C to 40 °C.

Key Feature for the DWDM-XFP-56.55

  • What wavelength does the networking hardware operate at?
    The hardware operates at a wavelength of 1556.55 nm.
  • Is the device compatible with Cisco Catalyst 6503-E Switches?
    Yes, the device is compatible with Cisco Catalyst 6503-E Switches, among others.
  • What type of port does the hardware use?
    It uses a 10 Gigabit Ethernet port type.
  • What frequency is supported by this hardware?
    The supported frequency is 100 GHz.
  • Can you specify the ITU Grid and Channel utilized?
    The hardware operates on the ITU Grid and uses ITU Channel 26.
  • What version of Cisco IOS® Software is required?
    Cisco IOS® Software Release 12.2(33)SXJ1 or later is required.
  • How much packet memory is available?
    There is 512 MB of packet memory available for buffering.
  • What are the operating temperature limits of the device?
    The operating temperature ranges from 0 °C to 40 °C.
  • How many MAC addresses can the hardware support?
    It can support up to 96,000 MAC addresses.
  • What is the minimum and maximum operating altitude?
    The operating altitude ranges from -60 m to 2000 m.

Product Review

The Cisco DWDM-XFP-56.55 offers a precise wavelength of 1556.55 nm and compatibility with the 10 Gigabit Ethernet standard, benefiting networks needing dense wavelength division multiplexing (DWDM) for high-capacity data transmission. However, its operation is limited to a specific range of Cisco Catalyst 6500 series switches and requires Cisco IOS Software Release 12.2(33)SXJ1 or later, which may restrict its use in diverse environments or with older systems. Additionally, the module supports a broad temperature and humidity range, ensuring reliable performance in various operating conditions, but its reliance on specific chassis and central forwarding engines could limit scalability and flexibility in network design.


The Cisco DWDM-XFP-56.55 is a specialized transceiver module designed to enhance the capabilities of high-speed networks. Operating at a wavelength of 1556.55 nm and supporting a 10 Gigabit Ethernet port type, this hardware is engineered for performance and reliability. It adheres to a 100 GHz frequency spacing on the ITU grid, specifically utilizing ITU Channel 26. This module is compatible with a range of Cisco Catalyst switches including the 6503-E, 6504, and 6504-E models, ensuring a wide range of deployment options. For central processing and forwarding, the module is compatible with Cisco Catalyst 6500 Series Supervisor Engine models 720-3B/3BXL and VS-S720-3C/3CXL. It requires Cisco IOS® Software Release 12.2(33)SXJ1 or later to operate, ensuring it runs on up-to-date software for optimal performance. The hardware includes 512 MB of packet memory, providing up to 200 ms of combined input and output buffering at 10 Gbps, which is essential for maintaining high-speed data transmission without loss. The DWDM-XFP-56.55 supports Ethernet II and IEEE 802.1q link encapsulations, offering flexibility in network design and connectivity. It features an extensive range of ingress and egress queues, with 128,000 available for a 40 Gbps line card and 64,000 for a 20 Gbps line card, facilitating efficient data management and prioritization. Additionally, the module can handle up to 96,000 MAC addresses, allowing for a vast number of connected devices. Designed for durability and longevity, the module operates within a temperature range of 0 °C to 40 °C and can be stored in temperatures ranging from -40 °C to 70 °C. Its operational humidity levels range from 10% to 90% (noncondensing), and it can function at altitudes from -60 m to 2000 m, ensuring reliable performance in a variety of environmental conditions. Network management is streamlined with support for CiscoWorks, CiscoView, and CiscoWorks Resource Manager Essentials (RME), providing administrators with powerful tools for monitoring and managing network infrastructure. The module occupies a single slot in a Cisco Catalyst 6500 Series Switch, making it a space-efficient addition to any network.
  • Size: 1.75 x 15.375 x 16 inches, offering a compact form factor.
  • Weight: Varies between 11.5 lb for a 2-Port 10 GbE Card and 12.4 lbs for a 4-Port 10 GbE Card, demonstrating its lightweight design.
  • Chassis Compatibility: Supports multiple Cisco Catalyst switches, ensuring versatile deployment options.
In summary, the Cisco DWDM-XFP-56.55 is a powerful networking module that brings high-speed, reliable connectivity to a wide range of Cisco Catalyst switches. Its support for advanced features and compatibility with essential Cisco software and hardware components make it an indispensable tool for network administrators aiming to enhance their network's performance and efficiency.


Item Number Cisco DWDM-XFP-56.55
Manufacturer Cisco
Optical Wavelength 1556.55 nm
Interface Type 10GbE
Channel Spacing 100 GHz
Channel Standard ITU Grid
ITU Grid Channel Channel 26
Switch Compatibility Compatible with Cisco Catalyst 6503-E, 6504, and 6504-E Switches
Supervisor Engine Compatibility Supports Cisco Catalyst 6500 Series Supervisor Engine 720-3B/3BXL, VS-S720-3C/3CXL
Required Software Must run Cisco IOS® Software Release 12.2(33)SXJ1 or newer
Buffer Size 512 MB for 200 ms of bidirectional buffering at 10 Gbps
Supported Encapsulation Methods Ethernet II, IEEE 802.1q
Input Queue Capacity 128,000 (40 Gbps Line Card); 64,000 (20G Line Card)
Output Queue Capacity 128,000 (40 Gbps Line Card); 64,000 (20G Line Card)
MAC Address Capacity Supports up to 96,000 MAC addresses
Operational Temperature Range 0 °C to 40 °C
Storage Temperature Range -40 °C to 70 °C
Humidity Range for Operation 10% to 90% (non-condensing)
Operational Altitude Range -60 m to 2000 m
Management Software Supported by CiscoWorks, CiscoView, and RME
Slot Requirement Occupies one slot in any Cisco Catalyst 6500 Series Switch
Dimensions (H x W x D) 1.75 x 15.375 x 16 inches
Weight 11.5 lbs (2-Port 10GbE Card), 12.4 lbs (4-Port 10GbE Card)

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