QSFP-DD Configuration

Overview

QSFP-DD QSFP-DD stands for Quad Small Form Factor Pluggable Double Density. QSFP-DD modules provide a scalable, high-bandwidth solution for data center networking, enabling efficient data transmission and network performance in modern computing environments. is a new module developed but with the same form factor as the current QSFP, to support high-speed solutions. It provides eight lanes electrical interface. Each lane can operate up to 25Gbps NRZ modulation or 50Gbps PAM4 modulation. QSFP modules are designed to be backward compatible with the existing QSFP modules.

System Description

Basically, the system will be developed to support 400Gbps data transmission. This will enable us to support the high-speed solution. The management interface will be used to get the status and control of the module.

CMIS modules have two physical interfaces for signal transmission:

Host Interface (Device to device interconnection)

The host interface is the high-speed electrical interface between the module and the host system. The host interface carries signals traveling from host to module (transmitter input signals) and signals traveling from module to host (receiver output signals). All electrical signals carried over the host interface are transmitted over the wire pairs, each of which is called host lanes.

Media Interface (Device to media interconnection)

The media interface is the high-speed electrical/optical interface between the module and the interconnecting media. The media interface carries signals that travel from module to media (transmitter output signals) and signals that travel from media to module (receiver input signals). Media interface signals are carried either over electrical wire pairs (Copper cables) or over optical wavelengths on physical fibers, which are called media lanes.

Objectives

The objective of this document is to provide a high-speed solution using QSFP-DD. The management characteristics, status, and control of QSFP-DD.

Topology

Figure 58. QSFP-DD Sample Topology