XFP vs SFP+: What Are the Differences?
XFP vs SFP+: What Are the Differences?
In fiber optic networking, optical module is the indispensable building block and the enabler of seamless data transmission. 10G fiber optic transceivers are still popular in the market such as 10G XFP and 10G SFP+, then XFP vs SFP+, what are the differences?
XFP vs SFP+: Specifications
XFP vs SFP+, what are the differences? Although both of these modules are mainly used in 10G fiber optic networking, 10G XFP transceivers differs from 10G SFP+ optics in some specifications.
| Optical Type | XFP | SFP+ |
| Standard | IEE802.3ae; XFP MSA | IEE802.3ae; SFF-8431; SFF-8432 |
| Publish Time | 2002 | 2006 |
| Size | Bigger | Smaller |
| Data Rate | 6Gbps; 8.5Gbps; 10Gbps | 6Gbps; 8.5Gbps; 10Gbps |
| Wavelength | 850nm; 1310nm; 1550nm; CWDM; DWDM; BIDI; Tunable; Copper | 850nm; 1310nm; 1550nm; CWDM; DWDM; BIDI; Tunable; Copper |
| Fiber Type | OM3; OM4; OS1; OS2 | OM3; OM4; OS1; OS2 |
| Typical Connector | LC | LC |
| Max Distance | 120km | 120km |
| Cost | Higher | Lower |
Through comparing XFP vs SFP+, it is clear that SFP+ shares some advantages over XFP:
10G SFP+ optics has a smaller footprint than the XFP modules, which can also enable greater port density. That is because SFP+ transceivers leave more circuitry to be implemented on the motherboard instead of its inside — it moves some functions to the motherboard, including signal modulation function, MAC, CDR and EDC. Moreover, XFP technology is relatively older but more expensive, that's also the reason 10G SFP+ modules have been gaining more market share.
XFP vs SFP+: Application Scenarios
- XFP optics are connectivity options for data center, enterprise wiring closet, and service provider transport applications.
- 10G SFP+ Transceivers are widely used on 10G switches, routers, servers, NICs and other transmission equipment. Featuring low power consumption and high speed, SFP+ is suitable for data center, enterprise wiring closet and other environments. You can click the link to see the details.
Can XFP module connect with SFP+ transceiver?
XFP connector and SFP+ connector are both LC duplex. For example, the XFP 10G 1310nm transceivers can talk to the SFP+ 10G 1310nm modules via LC duplex fiber optic cable. The following figure shows a typical interconnection application with XFP and SFP+ modules.
Can I plug SFP+ module into the XFP slot?
No. Since the size of two formats are totally different from each other, it is not feasible to use SFP+ module in XFP slot and vice versa. Please make clear which port type the switch is equipped with and remember that XFP and SFP+ optical transceivers are not interchangeable.
How's the prospect of 10G XFP and SFP+ modules?
Though the pursuit for higher bandwidth is unstoppable, 10GbE won't step out of the market in many cases. SFP+ transceivers are still a mainstream option offering a smaller size, lower consumption and lower cost. Not as popular as SFP+ transceivers, 10G XFP modules still play an irreplaceable role in some 10G network applications.
Conclusion
To summarize, XFP vs SFP+, there are many differences. While SFP+ transceivers have a smaller size than 10G XFP modules, considering cost, port density and applications, 10G SFP+ transceivers are favored in the market as a cost-effective solution.