The demand for network growth is rapidly increasing, which is due to the massive amount of storage needed for high bandwidth applications. Large growth hence spurs the requirements for expansion and scalability in the data center. Cabling infrastructures must evolve to provide reliability, manageability and flexibility. Obviously, the conservative 2-fiber transmission is not enough to catch up with the speed. And 12 or 24-fiber 40/100G Ethernet migration is quickly becoming a matter of survival. This article offers cabling solutions for cost-effective and simplified migration for 40/100G within the data center.
40G and 100G Ethernet employ parallel optics. Parallel optics transmission, compared to traditional serial transmission, uses an optic module interface where data is simultaneously transmitted and received over multiple fibers. For the 40GE transmission, 4 x 10G on 4 fibers per direction and 10 x 10G on 10 fibers per direction for the 100GE. Which ushers the need for the high quality and low loss multimode MTP connectors and assemblies.
Migration from 10G to 40G system utilizes 40G MTP/MPO breakout cables, with an MTP/MPO connector on one end and four duplex LC connectors on the other end. The IEEE ratified the 40GBASE-SR4 (MPO/MTP interface) standard that uses 4 lanes at 10G SFP+ (LC interface) per lane over multimode fiber for a total of 8 fibers.
Parallel optics 40GBASE-SR4 uses 8 out of 12 MTP/MPO interfaces fibers transmitting 4 duplex channels (4 for transmit and 4 receive), as shown in the following picture. QSFP+ to SFP+ breakout cable is 8-fibers MTP to LC breakout assembly.
As for data transmission between two 40G switches, 40G QSFP+ SR4 transceivers are generally adopted, transmitting signals over four duplex 10G lanes (4 transmit and 4 receive). A 12-fiber MTP/MPO trunk are involved, with 8 out of 12 fibers used to achieve 4 duplex signals transmission. And MTP/MPO adapter panels can be installed easily to make the next adaptation, as the following picture indicates.
Migrating from 10G to 100G still utilizes 100G MTP/MPO breakout cable, the IEEE ratified the 100GBASE-SR10 (MTP/MPO interface) standard that uses 10 lanes at 10G SFP+ per lane over multiple fiber for a total of 20 fibers. Parallel optics 100GBASE-SR10 uses 20 out of 24 MTP/MPO interface fibers transmitting 10 duplex channels.
100G connectivity can be achieved through ten 10G SFP+ transceivers. SFP+ transceiver operates on legacy duplex 10G lanes, thus taking full advantage of the existing network infrastructure. With a 24-fiber MTP/MPO trunk cable, of which 20 out of the 24 fibers are used to make duplex 10×10G transmission.
We can also get 100G to 100G connectivity via MTP/MPO assemblies: simply use the 24-fiber MTP/MPO interface trunk cable or 2×12-fiber MTP/MPO interface trunk cable. As shown in the following picture.
With the rapid increase in bandwidth consumption, the migration from 10G to 40G or 100G is inevitable. The economics of cost per port per 10Gbps is much more favorable for a 40GBASE-SR4 and 100GBASE-SR10 network. All the transceivers and cabling assemblies presented in the solutions are available in FS.COM. For more details, please visit www.fs.com or contact us via firstname.lastname@example.org.