Cisco 40GBASE QSFP User Manual

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Data Sheet

Cisco 40GBASE QSFP Modules

Product Overview

The Cisco® 40GBASE QSFP (Quad Small Form-Factor Pluggable) portfolio offers customers a wide variety of high-density and low-power 40 Gigabit Ethernet connectivity options for data center, high-performance computing 00networks, enterprise core and distribution layers, and service provider applications.

Features and Benefits of Cisco QSFP Modules

●Hot-swappable input/output device that plugs into a 40 Gigabit Ethernet Cisco QSFP port

●Interoperable with other IEEE-compliant 40GBASE interfaces where applicable

●Certified and tested on Cisco QSFP 40G ports for superior performance, quality, and reliability

●High-speed electrical interface compliant to the IEEE 802.3ba standard

●QSFP Form factor, 2-wire I2C communication interface and other low-speed electrical interface compliant to SFF 8436 and QSFP Multisource Agreement (MSA)

Table 1.	Cisco QSFP40G Portfolio

Product		Type	Connector Type

QSFP-40G-SR4-S		40GBASE-SR4, 4 lanes, 850 nm MMF	MPO-12

QSFP-40G-LR4-S		40GBASE-LR4, 1310 nm, SMF	LC

QSFP-40G-SR-BD		40GBASE-SR-BiDi, duplex MMF	LC

QSFP-40G-BD-RX		40GBASE-SR-BiDi, duplex MMF, Monitor	LC

QSFP-40G-SR4		40GBASE-SR4, 4 lanes, 850 nm MMF	MPO-12

FET-40G		Fabric Extender, 4 lanes, 850 nm MMF	MPO-12

QSFP-40G-CSR4		40GBASE-CSR4, 4 lanes, 850 nm MMF	MPO-12

WSP-Q40GLR4L		40GBASE-LR4-Lite, 1310 nm, SMF	LC

QSFP-4X10G-LR-S		4x10GBASE-LR	MPO-12

QSFP-40G-LR4		40GBASE-LR4, 1310 nm, SMF with OTU3 data-rate support	LC

QSFP-40G-ER4		40GBASE-ER4, 1310 nm, SMF with OTU3 data-rate support	LC

QSFP-4SFP10G-CU (0.5M,1M,2M, 3M,4M, 5M)		QSFP to 4 SFP+ copper break-out cables	-

QSFP-4X10G-AC (7M, 10M)

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Product	Type	Connector Type
Product	Type	Connector Type

QSFP-H40G-CU (0.5M,1M,2M, 3M,4M, 5M)	QSFP to QSFP copper direct-attach cables

QSFP-H40G-ACU (7M, 10M)

QSFP-4X10G-AOC (1M, 2M, 3M, 5M, 7M, 10M)	QSFP to four SFP+ active optical breakout cables

QSFP-H40G-AOC (1M, 2M, 3M, 5M, 7M, 10M, 15M,	QSFP to QSFP active optical cables
20M, 25M, 30M)

CVR-QSFP-SFP10G	QSFP 40G to SFP+ 10G adapter

Cisco QSFP-40G-SR4-S (S-Class)

The S-Class Cisco 40GBASE-SR4 QSFP module supports link lengths of 100 and 150 meters, respectively, on laser-optimized OM3 and OM4 multimode fibers. QSFP-40G-SR4-S is aligned to IEEE 40GBASE-SR4 optical specifications which support high-bandwidth 40G optical links over 12-fiber parallel fiber terminated with MPO/MTP multifiber female connectors. Because IEEE 40GBASE-SR4 does not support 4x10G breakout connectivity to 10GBASE-SR, see QSFP-40G-SR4 or QSFP-40G-CSR4 for such applications. QSFP-40G-SR4-S does not support FCoE.

Cisco QSFP-40G-LR4-S (S-Class)

The Cisco 40GBASE-LR4 QSFP module supports link lengths of up to 10 kilometer over a standard pair of G.652 single-mode fiber with duplex LC connectors. The QSFP-40G-LR4-S module supports 40GBASE Ethernet rate only. The 40 Gigabit Ethernet signal is carried over four wavelengths. Multiplexing and demultiplexing of the four wavelengths are managed in the device. QSFP-40G-LR4-S does not support FCoE.

Cisco QSFP 40G BiDi

The Cisco QSFP 40-Gbps BiDirectional (BiDi) transceiver (Figure 1) is a pluggable optical transceiver with a duplex LC connector interface for short-reach data communication and interconnect applications using MultiMode Fiber (MMF). The Cisco QSFP 40-Gbps BiDi transceiver offers customers a compelling solution that enables reuse of their existing 10 gigabit duplex MMF infrastructure for migration to 40 Gigabit Ethernet connectivity.

The Cisco QSFP 40-Gbps BiDi transceiver supports link lengths of 100 and 150 meters on laser-optimized OM3 and OM4 multimode fibers, respectively.

The Cisco BiDi transceiver complies with the QSFP MSA specification, enabling customers to use it on all QSFP 40-Gbps platforms to achieve high-density 40 Gigabit Ethernet networks.

Each Cisco QSFP 40-Gbps BiDi transceiver consists of two 20-Gbps transmit and receive channels in the 832-918 nanometer wavelength range, enabling an aggregated 40-Gbps link over a two-strand multimode fiber connection.

Figure 1. Cisco QSFP BiDi 40Gbps Transceiver: Duplex MMF with LC Connectors at Both Ends

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Cisco QSFP-40G-BD-RX

The Cisco QSFP 40-Gbps BiDi monitor is a pluggable optical module for use with link monitor hardware, such as the Cisco Nexus® Data Broker. Like the QSFP BiDi transceiver, it has a duplex MMF LC connector interface. The QSFP BiDi monitor is used only in the monitoring path of a link containing a passive optical tap splitter. The Cisco QSFP monitor offers the same specifications as the QSFP BiDi Transceiver, except that it does not transmit any signal, and thus eliminates the risk of interfering with the live BiDi link path.

Cisco QSFP-40G-SR4

The Cisco 40GBASE-SR4 QSFP Modules support link lengths of 100 meters and 150 meters, respectively, on laser-optimized OM3 and OM4 multimode fibers. It primarily enables high-bandwidth 40G optical links over 12-fiber parallel fiber terminated with MPO/MTP multifiber female connectors. It can also be used in a 4x10G breakout mode for interoperability with 10GBASE-SR interfaces up to 100 and 150 meters on OM3 and OM4 fibers, respectively. The worry-free 4x10G mode operation is enabled by the optimization of the transmit and receive optical characteristics of the Cisco QSFP-40G-SR4 to prevent receiver overload or unnecessary triggering of alarm thresholds on the 10GBASE-SR receiver, and at the same time is completely interoperable with all standard 40GBASE-SR4 interfaces.

The 4x10G connectivity is achieved using an external 12-fiber parallel to 2-fiber duplex breakout cable, which connects the 40GBASE-SR4 module to four 10GBASE-SR optical interfaces. Cisco QSFP-40G-SR4 is optimized to guarantee interoperability with any IEEE 40GBASE-SR4 and 10GBASE-SR (in 4x10G mode).

Cisco FET-40G

Cisco FET-40G QSFP Modules are fabric-extender transceiver modules used to connect to fabric links (links between the fabric extender switch and the parent switch). The interconnect works over parallel multimode fiber across distances of up to 100 and 150 meters, respectively, on laser-optimized OM3 and OM4 multimode fiber cables. This module can be used for native 40G optical links over 12-fiber ribbon cables with MPO/MTP connectors or in 4x10G mode with parallel-to-duplex fiber breakout cables for connectivity to four FET-10G interfaces.

Cisco QSFP-40G-CSR4

Cisco 40GBASE-CSR4 QSFP Modules extend the reach of the IEEE 40GBASE-SR4 interface to 300 and 400 meters on laser-optimized OM3 and OM4 multimode parallel fiber, respectively. Each 10-gigabit lane of this module is compliant to IEEE 10GBASE-SR specifications. This module can be used for native 40G optical links over 12-fiber parallel cables with MPO/MTP female connectors or in a 4x10G breakout mode with parallel to duplex fiber breakout cables for connectivity to four 10GBASE-SR interfaces. Cisco QSFP-40G-CSR4 is optimized to guarantee interoperability over the complete specification range of 10GBASE-SR.

Cisco QSFP-40G-LR4

The Cisco 40GBASE-LR4 QSFP module supports link lengths of up to 10 kilometers over a standard pair of G.652 single-mode fiber with duplex LC connectors. The 40 Gigabit Ethernet signal is carried over four wavelengths. Multiplexing and demultiplexing of the four wavelengths are managed within the device.

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Cisco WSP-Q40GLR4L (QSFP-LR4-Lite)

The Cisco WSP-Q40GLR4L QSFP module supports link lengths of up to 2 kilometers over a standard pair of G.652 Single-Mode Fiber (SMF) with duplex LC connectors. The 40 Gigabit Ethernet signal is carried over four wavelengths. Multiplexing and demultiplexing of the four wavelengths are managed within the device. It is interoperable with 40GBASE-LR4 for distances up to 2 kilometers. The operating temperature range is from +10 to +60°C with an optical link budget of 4 decibels. This 4-decibel link budget offers the ability to support the loss from patch panels in the link in a data center environment.

Cisco QSFP-4X10G-LR-S (S-Class)

The Cisco QSFP-4X10G-LR-S QSFP module supports link lengths of up to 10km on G.652 Single-Mode Fiber (SMF). It enables high-bandwidth 40G optical links over 12-fiber parallel fiber terminated with MPO/MTP multifiber female connectors. It can also be used in a 4x10G mode for interoperability with 10GBASE-LR interfaces up to 10km.

The 4x10G connectivity is achieved using an external 12-fiber parallel to 2-fiber duplex breakout cable, which connects the 4x10G LR module to four 10GBASE-LR optical interfaces. Cisco’s QSFP-4X10G-LR-S is optimized to guarantee interoperability over the full specification range of 10GBASE-LR in 4x10G mode. QSFP-4X10G-LR-S does not support FCoE.

Cisco QSFP-40G-ER4

The Cisco 40GBASE-ER4 QSFP Module supports link lengths up to 40km over G.652 single-mode fiber with duplex LC connectors. The 40GE or OTU3 signal is carried over four wavelengths in the 1310nm range. Multiplexing and demultiplexing of the four wavelengths are managed within the device.

Cisco QSFP to Four SFP+ Copper Breakout Cables

Cisco QSFP to four SFP+ copper direct-attach breakout cables (Figure 2) are suitable for very short distances and offer a very cost-effective way to connect within racks and across adjacent racks. These breakout cables connect to a 40G QSFP port of a Cisco switch on one end and to four 10G SFP+ ports of a Cisco switch on the other end. Cisco currently offers passive cables in lengths of 0.5, 1, 2, 3, 4 and 5 meters and active cables in lengths of 7 and 10 meters.

Figure 2. Cisco QSFP to Four SFP+ Copper Breakout Cables

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Cisco QSFP to QSFP Copper Direct-Attach Cables

Cisco QSFP to QSFP copper direct-attach 40GBASE-CR4 cables (Figure 3) are suitable for very short distances and offer a very cost-effective way to establish a 40-gigabit link between QSFP ports of Cisco switches within racks and across adjacent racks. Cisco currently offers passive cables in lengths of 0.5, 1, 2, 3, 4 and 5 meters and active cables in lengths of 7 and 10 meters.

Figure 3. Cisco 40GBASE-CR4 QSFP Direct-Attach Copper Cables

Cisco QSFP to Four SFP+ Active Optical Breakout Cables

Cisco QSFP to four SFP+ active optical breakout cables (Figure 4) are suitable for very short distances and offer a flexible way to connect within racks and across adjacent racks. Active optical cables are much thinner and lighter than copper cables, which makes cabling easier. Active optical cables enable efficient system airflow and have no ElectroMagnetic Interference (EMI) issues, which is critical in high-density racks. These breakout cables connect to a 40G QSFP port of a Cisco switch on one end and to four 10G SFP+ ports of a Cisco switch on the other end. Cisco currently offers active optical breakout cables in lengths of 1, 2, 3, 5, 7, and 10 meters.

Figure 4. Cisco 40G QSFP to Four SFP+ Breakout Active Optics Cables

Cisco QSFP to QSFP Active Optical Cables

Cisco QSFP to QSFP copper direct-attach 40GBASE-CR4 cables (Figure 5) are suitable for very short distances and offer a flexible way to connect within racks and across adjacent racks. Active optical cables are much thinner and lighter than copper cables, which makes cabling easier. Active optical cables enable efficient system airflow and have no EMI issues, which is critical in high-density racks. Cisco currently offers active optical cables in lengths of 1, 2, 3, 5, 7, 10, 15, 20, 25 and 30 meters.

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