With 10G and 25G Ethernet tools coexisting available today, we might frequently encounter the compatibility issues linked to SFP+ and SFP28 form factors. Anyway, the newer 25GbE technologies are backward compatible with 10GbE, allowing customers to build and cross-connect a heterogeneous-speed Ethernet network. Here we list the faqs coming through average customers.

1.What's the difference between SFP28 and SFP+?

The pinouts of SFP28 and SFP+ connectors are mating compatible. However, SFP+ is made to operate at increase to 10 Gb/s whereas SFP28 can handle 25Gbps, 10Gbps and even 1Gbps. SFP28 has increased bandwidth, superior impedance control and less crosstalk compared to the SFP+ solution. Besides, the SFP28 copper cable offers considerably greater bandwidth and lower loss when compared to SFP+ version.

2.Can the SFP28 be used in SFP+ slot, and what speed will I get?

Theoretically, plugging an SFP28 transceiver or cable into the 10G interface can be simple for certain devices to get 10Gb/s data rate, but this solution isn't recommended, because it will be tied to the NIC and switch port that you have. Only once your SFP28 module is 100% compatible together with your server or switch is it possible to ensure that the links can go seamlessly and efficiently.

3.Can the SFP+ be utilized in SFP28 slot, and what speed am i going to get?

Theoretically, plugging an SFP+ transceiver or cable in to the 25G SFP28 slot is feasible. Nevertheless, you also need to ensure make sure that your existing modules will be appropriate for your switch gear. In other words, although a switch that accepts the SFP28 form factor can physically accept a SFP+ connector in the same port, it doesn’t imply that your SFP+ modules will continue to work on your own equipment.