Cisco SFP+ Module Wiki and Buying Tips

When it comes to optical modules, the brand Cisco especially their Cisco SFP+ modules will be mentioned by almost everyone in the optic fiber field. As one of the worldwide leaders in IT and networking, Cisco has dedicated to networking equipment design and manufacture for several decades. Among their all sorts of product lines, SFP+ modules have enjoyed a widespread reputation. In the context of that, in this article, we are going to make an overall exploration of the Cisco’s superstar product: Cisco SFP+ module.

An Overview of the Cisco SFP+ Module

Like the general SFP+ transceivers, Cisco SFP+ modules are kinds of optical devices designed for 8 Gbit/s Fibre Channel, 10 Gigabit Ethernet and optical transport network standard OTU2, supporting data rates up to 16 Gbit/s.

Main Features

Main features of the Cisco SFP+ modules can be shared as below:

  • Industry’s smallest 10G form factor for greatest density per chassis
  • Hot-swappable input/output devices that plug into an Ethernet SFP+ port of a Cisco switch (no need to power down if installing or replacing)
  • Supports “pay-as-you-populate” model for investment protection and ease of technology migration
  • Optical interoperability with 10GBASE XENPAK, 10GBASE X2, and 10GBASE XFP interfaces on the same link
  • Hot-swappable input/output devices that plug into an Ethernet SFP+ port of a Cisco switch (no need to power down if installing or replacing)
  • Cisco quality identification (ID) feature enables a Cisco platform to identify whether the module is certified and tested by Cisco
Cisco SFP+ Module Types

With various Cisco SFP+ module types, a wide variety of 10 Gigabit Ethernet connectivity options for diverse networking environments, like data centers, enterprise wiring closet, and service provider transport applications can be offered. Altogether, Cisco SFP+ modules consist of Cisco SFP-10G-SR, SFP-10G-LR (LRM), SFP-10G-ER and SFP-10G-ZR, etc. You can refer to the table displayed as below for detailed specifications of Cisco SFP+ modules.

Cisco SFP+
Wavelength (nm)
Interface
Cable Type
Core Size (Microns)
Cable Distance
Cisco SFP-10G-SR-S

850

Dual LC/PC

MMF

62.5

26 m
Cisco SFP-10G-SR
33 m
Cisco SFP-10G-SR-X
50
66/82/300/400 m
Cisco SFP-10G-LRM

1310

Dual LC/PC

SMF/MMF
G.652/62.5/50
300/100/220 m
Cisco SFP-10G-LR-S

SMF

G.652

10 km

Cisco SFP-10G-LR
Cisco SFP-10G-LR-X
Cisco SFP-10G-ER-S

1550

Dual LC/PC

SMF

G.652

40 km

Cisco SFP-10G-ER
Cisco SFP-10G-ZR-S

80 km

Cisco SFP-10G-ZR
Cisco FET-10G
850
Dual LC/PC
MMF
50
25/100 km
Cisco SFP-10G-BXD-I
1330

Dual LC/PC

SMF

G.652

10 km

Cisco SFP-10G-BXU-I
1270
Cisco SFP-10G-BX40D-I
1330

40 km

Cisco SFP-10G-BX40U-I
1270

How to Choose Cisco SFP+ Modules?

If you want to buy Cisco SFP+ modules, it’s sensible to put their optimum transmission distance and compatibility with other Cisco devices into consideration.

As for the transmission distance, basically, the ranges between 100 m to 400 m and 10 km to 80 km are commonly seen. For the distance from 100 m to 400 m, we usually use Cisco 10G multimode SFP+ transceiver. For example, if you want to buy a Cisco SFP+ module for transmission within 300 m, then the Cisco SFP-10G-SR module will be the best choice. More information about the optimum transmission distance of Cisco SFP+ modules, you can refer to the table above.

Cisco SFP 10G SR
Figure 1: Cisco SFP-10G-SR (Right) and Cisco GLC-SX-MMD SFP (Left)

Apart from distance, another important thing you should be clear about is the SFP+ module’s compatibility with other Cisco devices. You may wonder if this Cisco SFP+ Module can connect with other devices, such as SFP modules. The answer is NO. For example, If you connect the SFP-10G-SR with Cisco GLC-SX-MMD SFP transceiver (1 Gbps only), they may not be able to work. Since the SFP-10G-SR only runs at 10 Gbps link rate, it means you force SFP-10G-SR to use 1Gbps speed. You can never interconnect them. For more details about the compatibility of Cisco modules, you can search it from their online Compatibility Matrix.

When you search Cisco SFP+ modules online, you will find the price of these modules from original brand retailers is not economical. Therefore, in recent years, using non-original brand retailers optical transceivers in the fiber-optic network has become a trend.

Conclusion

As a leading role in fiber optic network, Cisco SFP+ module has been witnessed a glorious period.

Related Article: PoE Switch vs Non-PoE Switch: Which One to Choose?

Author: Camilla

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