The Quad Small Form Factor Pluggable Double Density (QSFP-DD) Multi-Source Agreement (MSA) group released revision 7.0 of its hardware specification . The release updates the existing QSFP-DD MSA spec and introduces the QSFP-DD1600 module variant , extending QSFP-DD leadership to 1.6 Tbps with broad support from component manufacturers .
Highlights:
- The new specification maintains the form factor’s eight electrical lanes with each lane operating at the new higher 200 Gbps rate to provide an aggregate module bandwidth capacity of 1.6 Tbps.
- The 1.6 Tbps host port maintains backwards compatibility with the entire family of QSFP and QSFP-DD modules and cables.
- The new release includes enhancements to further improve the power handling capability of QSFP and QSFP-DD form factor’s small faceplate profile and the QSFP-DD’s riding heatsink feature. The combination of these features enables system designers to more efficiently cool the majority of modules as well as support even higher power modules that may be required in next-generation high-density Ethernet switch platforms, supporting all module variants such as coherent 1600ZR modules.
- The new QSFP-DD1600 specification maintains the current port density and fully utilizes the faceplate to efficiently use the rack-space that is expected from next-generation capacity switches.
- The QSFP-DD/QSFP-DD800/QSFP-DD1600 memory map are based on “Common Management Interface Specification (CMIS).
“Network operators are continuing to push the QSFP-DD form factor to meet the expectations of next generation system while maintaining backward compatibility,” says Scott Sommers, MSA co-chair. “This is a critical step for the operational strategy of next generation deployments.”
“The design flexibility that the QSFP-DD form factor enables with its riding heatsink and small faceplate profile maximizes the available air flow and provides engineers the flexibility to meet the challenges for the next-generation of system design,” says Mark Nowell, MSA co-chair. “QSFP-DD continues to be the cornerstone of high-performance, high-density pluggable optics for the foreseeable future.”
A new whitepaper focusing on the thermal enhancements, including the resulting reduction of system power of QSFP-DD1600 is available on the QSFP-DD MSA website: www.qsfp-dd.com.