Cisco 40GBASE QSFP User Manual
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Data Sheet
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)
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
© 2017 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 2 of 14
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,
20M, 25M, 30M)
QSFP to QSFP active optical cables
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.
© 2017 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 4 of 14
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
© 2017 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 5 of 14
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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