40/100G Solutions

FS.COM 40G QSFP+ Cabling Solutions for Cisco Nexus 9508 Switch

Cisco, as one of the most famous worldwide leader in IT and networking field, has introduced various equipment to the telecommunication market, like switch. Cisco Nexus 9508, as one of the first member of Cisco Nexus 9000 Series platform, is designed for a rage of environments, such as physical and virtual computing, Big Data application and high-performance computing to deliver industry-leading and high-density 40G and future 100G Ethernet. This post aims to introduce Cisco Nexus 9508 switch and some cost-effective 40G cabling solutions for it.

Cisco Nexus 9508 Switch Overview

Cisco Nexus 9508 is a modular, 8-slot, 13-rack-unit (13RU), layer 2 and 3 non-blocking Ethernet and Fibre Channel over Ethernet (FCoE) capable switch. With more than 30 terabits per second of backplane bandwidth, the switch supports 1, 10, 40, and future 100 Gigabit Ethernet interfaces through a comprehensive selection of modular line cards, providing sufficient capacity for both access and aggregation-layer deployment. But in fact, there are only three line cards for initial offering: 36-port 40G QSFP+ line card, 48-port 1 and 10G SFP+ with 4-port 40G QSFP+ line card, and 48-port 1 and 10GBase-T plus 4-port 40G QSFP+ line card as shown below.

48-port 1 and 10G SFP+ with 4-port 40G QSFP+ line card, and 48-port 1 and 10GBase-T plus 4-port 40G QSFP+ line card

FS.COM, as a professional manufacturer and supplier of fiber optic cabling products, offers a series of 40G QSFP+ cabling solutions for Cisco Nexus 9508 switch, that we will mainly introduce four solutions here.

40G QSFP+ Direct Connection Cabling
40G to 40G Direct Connection

40GBase-SR4 QSFP+ with duplex patch cable and QSFP+ direct attach cable (DAC) can be both applied to connect two or more switches which are in the same rack or in the adjacent. However, it is known that QSFP+ DAC is a cable assembly which is permanently terminated with QSFP+ modules at both ends. These QSFP+ modules are without expensive optical lasers which makes the cable much cheaper than 40GBase-SR4 QSFP+ and patch cable for 40G to 40G direct connection. Besides, it is more easy to deal with QSFP+ DAC cables. You just need to plug the QSFP+ connector into the switch port, and it works as shown below.

40GBase-SR4 QSFP+ with duplex patch cable vs. QSFP+ DAC cable

10G to 40G Direct Connection

Besides 40G to 40G direct connection, sometimes, for 10G to 40G migration, we also need to direct-connect Cisco Nexus 9508 switch to SFP+ interfaced 10G switch. In this scenario, both QSFP+ MTP breakout cable and QSFP+ to 4×SFP+ DAC can be used, but for the same reason as we have mentioned above. QSFP+ to 4×SFP+ DAC is more commonly used for its low cost. The following picture shows the 10G to 40G direct connection with QSFP+ to 4×SFP+ DAC.

qsfp-to-4-sfp-dac

40G QSFP+ Interconnection Cabling
40G to 40G Interconnection

When the distance between Cisco Nexus 9508 switch and other switches is long, we have to interconnect the two devices. 40GBase-SR4 or 40GBase-CSR4 QSFP+ modules and MTP or MPO able assemblies are often deployed. The following image shows 40G 40GBase-SR4/CSR4 modules and MPO trunk able for the interconnection between Cisco Nexus 9508 switch and other switches.

qsfp-to-qsfp-interconnection

10G to 40G Interconnection

Besides for 40G to 40G interconnection, when the distance between Cisco Nexus 9508 switch and 10G switch, we also can use MTP to LC breakout cable with 40GBase-SR4/CSR4 and 10GBase-SR to logically configure the 40G switch as 4×10 Gigabit Ethernet interfaces for the interconnection between Cisco Nexus 9508 switch and the 10G switch as the following image shows.

10G to 40G interconnection

Conclusion

Cisco Nexus 9508 switch is designed to provide consistent connectivity, security, and visibility across a range of bare-metal, virtualized, and cloud computing environments. To ensure it can offer high performance, FS.COM offers practical and cost-effective 40G QSFP+ cabling solutions for Cisco Nexus 9508 switch as we have mentioned above. All of the fiber optics and patch cables have fully tested and can work well. For any requirement, kindly visit FS.COM.

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