Optics for Juniper QFX5200 Switches Deployment

Posted on by FS.COM

Network operators are increasingly deploying scale-out, spine-and-leaf fabric architectures, built with fixed-configuration switches to support growing east-west traffic in the data center. The Juniper QFX5200 line of next-generation, fixed-configuration leaf/access switches offers flexible, cost-effective, high-density 10GbE, 25GbE, 40GbE, 50GbE, and 100GbE interfaces for server and intra-fabric connectivity, providing deployment versatility, investment protection, and future-proofing for today’s data centers.

The Juniper QFX5200 Switches

Two versions of the Juniper QFX5200 switch are available. The first one is QFX5200-32C, which is a 100GbE top-of-rack switch supporting both QSFP+ and QSFP28 transceivers in the 32 QSFP+ or QSFP28 Ethernet ports. The ports 0 through 31 can be configured as either uplinks or as access ports. The QSFP28 ports are configured as 100GbE ports by default, but can also be configured to speeds of 50, 40, 25, or 10 Gigabit Ethernet.


The other one is QFX5200-64Q, a 2U platform featuring 64 QSFP+ ports or 32 QSFP28 ports, which provides robust foundations for building high-density IP fabrics in the data center.


A QSFP28 module can be used for a 1x100GbE connection or 2x50GbE or 4x25GbE connections using breakout cables. A QSFP+ module can be used for a 1x40GbE connection or 4x10GbE connections using breakout cables. Both the two versions support 128 10GbE SFP+ through QSFP+ to SFP+ breakout cable and 128 25GbE SFP28 through QSFP28 to SFP28 breakout cable.

The QFX5200 fixed-configuration access switches are ideally suited for leaf deployments in IP fabric networks. They feature extra low latency, a built-in hardware-based PTP module, and line-rate, high-density QSFP+/QSFP28 ports that support 10GbE, 25GbE, 40GbE, 50GbE, and 100GbE connections. Offering an advanced L2, L3, and MPLS feature set, network operators can use the QFX5200 to build large, high-density IP fabrics that support upgrades to 25GbE servers, network virtualization, and intelligent traffic forwarding based on proven, Internet-scale technology. The preceeding part will lead to the deployment options for QFX5200 switches.

The Juniper QFX5200 Deployment Options

Some of the QFX5200 deployment possibilities are described in the following table.

Port Combinations Switch Deployment
128x25GbE QFX5200-32C Leaf
64x40GbE QFX5200-64Q Leaf
64x25GbE + 16x100GbE QFX5200-32C 25GbE access
36x40GbE + 14x100GbE QFX5200-64Q 40GbE access
96x10GbE + 8x100GbE QFX5200-32C 10GbE access

The QFX5200 supports a diverse set of deployment options, including L3 fabrics, Juniper Networks Junos Fusion, and L2 and L3 networks with MC-LAG. Customers can choose the architecture that best suits their deployment needs and easily adapts and evolves as requirements change over time. The QFX5200 switches serve as the universal building block for all of these switching architectures, enabling data center operators to build cloud networks their way.

For customers looking to build scale-out data centers, a Layer 3 spine-and-leaf Clos fabric is ideal due to its predictable, nonblocking performance and scale characteristics. For example, a two-tier fabric built with QFX5200 switches are leafs and Juniper Networks QFX10000 switches as the spine can scale to support up to 18,432 40GbE ports, or 36,864 25GbE or 10GbE server ports in a single fabric. The following picture shows a Layer 3 fabric using QFX5200 as leafs and QFX10000 switches as the spine.

Layer 3 fabric

Fiberstore Optics for the Switch Ports

The Ethernet ports support QSFP+ transceivers, QSFP28 transceivers, QSFP+ direct attach copper cables and breakout cables. The following tables list Fiberstore transceivers and cables for QFX5200 switches.

Table 1: supported optical transceivers for the QFX5200

MFG PART# Description
QFX-SFP-1GE-SX Juniper Networks QFX-SFP-1GE-SX Compatible 1000BASE-SX SFP 850nm 550m DOM Transceiver
QFX-SFP-1GE-T Juniper Networks QFX-SFP-1GE-T Compatible 1000BASE-T SFP Copper RJ-45 100m Transceiver
QFX-QSFP-40G-SR4 Juniper Networks QFX-QSFP-40G-SR4 Compatible 40GBASE-SR4 QSFP+ 850nm 150m DOM Transceiver
QFX-QSFP-40G-ESR4 Juniper Networks QFX-QSFP-40G-ESR4 Compatible 4X10G-SR QSFP+ 850nm 400m DOM Transceiver
JNP-QSFP-4X10GE-IR Juniper Networks JNP-QSFP-4X10GE-IR Compatible 4x10GBASE-IR QSFP+ 1310nm 1.4km DOM Transceiver
JNP-QSFP-40GE-IR4 Juniper Networks JNP-QSFP-40GE-IR4 Compatible 40GBASE-IR4 QSFP+ 1310nm 2km DOM Transceiver
JNP-QSFP-40G-LR4 Juniper Networks JNP-QSFP-40G-LR4 Compatible 40GBASE-LR4 QSFP+ 1310nm 10km DOM Transceiver
JNP-QSFP-40G-LX4 Juniper Networks JNP-QSFP-40G-LX4 Compatible 40GBASE-LX4 QSFP+ 1310nm 2km DOM Transceiver
JNP-QSFP-100G-SR4 QSFP28 Juniper JNP-QSFP-100G-SR4 Compatible 100GBASE-SR4 850nm 100m Transceiver
JNP-QSFP-100G-LR4 QSFP28 Juniper JNP-QSFP-100G-LR4 Compatible 100GBASE-LR4 1310nm 10km Transceiver

Table 2: supported DAC and DAC breakout cables for QFX5200

MFG PART# Description
QFX-SFP-DAC-1M 1m Juniper Networks QFX-SFP-DAC-1M Compatible 10G SFP+ Passive Direct Attach Copper Twinax Cable
QFX-SFP-DAC-1MA 1m Juniper Networks QFX-SFP-DAC-1MA Compatible 10G SFP+ Active Direct Attach Copper Twinax Cable
QFX-SFP-DAC-3M 3m Juniper Networks QFX-SFP-DAC-3M Compatible 10G SFP+ Passive Direct Attach Copper Twinax Cable
QFX-SFP-DAC-3MA 3m Juniper Networks QFX-SFP-DAC-3MA Compatible 10G SFP+ Active Direct Attach Copper Twinax Cable
QFX-SFP-DAC-5M 5m Juniper Networks QFX-SFP-DAC-5M Compatible 10G SFP+ Passive Direct Attach Copper Twinax Cable
QFX-SFP-DAC-7MA 7m Juniper Networks QFX-SFP-DAC-7MA Compatible 10G SFP+ Active Direct Attach Copper Twinax Cable
QFX-QSFP-DAC-1M 1m Juniper Networks QFX-QSFP-DAC-1M Compatible 40G QSFP+ Passive Direct Attach Copper Cable
QFX-QSFP-DAC-3M 3m Juniper Networks QFX-QSFP-DAC-3M Compatible 40G QSFP+ Passive Direct Attach Copper Cable
JNP-QSFP-DAC-5M 5m Juniper Networks JNP-QSFP-DAC-5M Compatible 40G QSFP+ Passive Direct Attach Copper Cable
JNP-QSFP-DAC-7MA 7m Juniper Networks JNP-QSFP-DAC-7MA Compatible 40G QSFP+ Active Direct Attach Copper Cable
JNP-QSFP-DAC-10MA 10m Juniper Networks JNP-QSFP-DAC-10MA Compatible 40G QSFP+ Active Direct Attach Copper Cable
QFX-QSFP-DACBO-1M 1m Juniper Networks QFX-QSFP-DACBO-1M Compatible 40G QSFP+ to 4x10G SFP+ Passive Direct Attach Copper Breakout Cable
QFX-QSFP-DACBO-3M 3m Juniper Networks QFX-QSFP-DACBO-3M Compatible 40G QSFP+ to 4x10G SFP+ Passive Direct Attach Copper Breakout Cable

The QFX5200 access switches with multi-speed capability from 10GbE to 100GbE enable customers to migrate to higher port speeds and support 25GbE/50GbE without costly upgrades. With 25GbE, customers get 2.5 times the performance over 10GbE while using existing cabling infrastructure.

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