Juniper QFX5210-64C Ethernet Switch: Make Your Network More Powerful

- Posted by Author: admin in Category: Networking |

Are you looking to upgrade your network infrastructure? The Juniper QFX5210-64C Ethernet Switch might just be the perfect solution. This powerful switch is designed to offer high-performance data access and routing capabilities, making it a great choice for businesses of all sizes. In this blog post, we’ll discuss the features and benefits of the Juniper QFX5210-64C and explain why it’s an ideal choice for those looking to make their networks more powerful. We’ll also look at how it can help you improve your security, reliability, and scalability. 

What is an ethernet switch?

An Ethernet switch is a computer networking device that connects devices together on a local area network (LAN). Ethernet switches work at the data link layer (layer 2) of the OSI model and are responsible for forwarding traffic between LAN devices. They typically contain multiple ports, each of which can be connected to a different device.

Ethernet switches use a technique called packet switching to receive and forward packets of data. Packet switching involves receiving a packet of data at one port and then forwarding it to another port where it will be received by its destination device. To do this, the switch must keep track of which devices are connected to which ports.

When a packet is received by an Ethernet switch, the switch looks up the destination address in its table of port assignments and then forwards the packet to the appropriate port. This process is known as address learning. The switch also uses address learning to update its table of port assignments when devices are added or removed from the network.

Ethernet switches are available in a variety of sizes and speeds. The number of ports on an Ethernet switch can range from two to several thousand. Ethernet switch speeds can be 10 Mbps, 100 Mbps, 1 Gbps, or even 10 Gbps.

The Juniper QFX5210-64C Ethernet Switch

Network operators are increasingly deploying scale-out spine-and-leaf IP fabric architectures built with fixed-configuration switches to support growing east-west traffic in the data center. The Juniper Networks QFX5210 Switch is a next-generation, fixed-configuration spine/leaf switch that offers flexible, cost-effective, high-density 10GbE, 25GbE, 40GbE, and 100GbE interfaces for IP fabric networks, providing deployment versatility, investment protection, and future-proofing for today’s data centers.

The QFX5210 Switch’s high port density also contributes to simplified Clos architectures, eliminating network tiers while reducing complexity and cost. Like other Juniper Networks QFX Series Switches, the QFX5210 supports advanced L2, L3, and MPLS features. For large public cloud providers—among the first to adopt 25GbE servers to meet explosive workload growth—the QFX5210 enables very largely, dense, and fast IP fabrics based on proven Internet-scale technology. The QFX5210 runs the same reliable, high-performance Junos® operating system used by network operators around the world.

The QFX5210 is a compact, 2 U platform featuring 64 quad small form-factor pluggable plus (QSFP+) transceivers or QSFP28 ports, with two redundant 1100 W AC/DC power supplies and four fan trays. A QSFP28 module can be used to provide a 1x100GbE connection or 4x25GbE connection using breakout cables. A QSFP+ module can be used to provide a 1x40GbE connection or 4x10GbE connection using breakout cables.

The QFX5210 features a high-throughput 12.8 Tbps Packet Forwarding Engine (PFE). Control plane performance is further enhanced with the Intel Broadwell-DE, 4 Core, 2.2 GHz CPU, and 16 GB DDR4, 100 GB SSD storage. The QFX5210 can be used in L3 fabrics and L2 networks with multichassis link aggregation (MC-LAG). Customers can choose the architecture that best suits their deployment needs and easily adapt and evolve as requirements change over time. The QFX5210 switch serves as a universal building block for these switching architectures, enabling data center operators to build cloud networks their way.

• IP Fabric: For customers looking to build scale-out data centers, an L3 spine-and-leaf Clos fabric is ideal due to its predictable, nonblocking performance and scale characteristics. For example, a two-tier fabric built with the QFX5210 Switch as leaves and 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.

• Overlays: Customers can deploy overlay networks to provide L2 adjacencies for applications over L3 fabrics. The overlay networks use VXLAN in the data plane and EVPN to program the overlays. The overlays can operate without a controller or can be orchestrated with a fabric management orchestrator to provide L2/L3 overlay virtual networking and security for bare metal servers and virtual workloads. QFX5210 switches can also integrate with VMware NSX.

• MC-LAG: The QFX5210 supports the MC-LAG protocol between two switches, eliminating Spanning Tree Protocol (STP) in traditional L2 networks when deployed in the aggregation layer. MC-LAG’s active/active operation ensures complete bandwidth utilization between the network’s access and aggregation layers, while the dual control plane technology ensures the highest availability for applications.

The Features and Benefits of the Juniper QFX5210-64C Ethernet Switch

The QFX5210 can be positioned as a top-of-rack device in a centralized gateway architecture (also known as centrally routed bridging, or CRB). The QFX5210 deployed as an access switch with the Juniper Networks QFX10000 line of Switches acting as the spine device configured as a central gateway. In this topology, the QFX10000 can also be configured as a collapsed spine and edge device, acting as a central gateway for Ethernet VPN (EVPN)-Virtual Extensible LAN (VXLAN), MPLS, and other tunneling protocols. The 100GbE ports on the QFX5210 can be channelized to support 4x25GbE or 4x10GbE downlinks.

• Flexible connectivity options: The QFX5210 offers a choice of 10GbE, 25GbE, 40GbE, and 100GbE interface speeds for server and intra-fabric connectivity, providing deployment versatility and investment protection.

• Automation and programmability: The QFX5210 supports numerous network automation features, including operations and event scripts, ZTP, and Juniper plug-ins for OpenStack Neutron.

• Flexible Forwarding Table: The QFX5210 switch’s Flexible Forwarding Table (FFT) allows the hardware table to be carved into configurable partitions of L2 media access control (MAC), L3 host, and longest prefix match (LPM) tables. Junos OS provides configurable options through a CLI, enabling each QFX5210 to be optimized for different deployment scenarios.

• MPLS: The QFX5210 supports a broad set of MPLS features, including L3 VPN, RSVP traffic engineering, and LDP to support standards-based multitenancy and network virtualization with per-flow SLAs at scale. The QFX5210 can also be deployed as a low-latency MPLS label-switching router (LSR) or MPLS provider edge (PE) router in smaller-scale environments. The QFX5210, along with the Juniper Networks QFX5220, QFX5200, QFX5120, QFX5110, and QFX5100 switches, is among the industry’s most compact, low-latency, high-density, a low-power family of switches to offer an MPLS feature set.

• RoCEv2: As a switch capable of transporting data as well as storage traffic over Ethernet, the QFX5210 provides an IEEE data center bridging (DCB) converged network between servers with disaggregated flash storage arrays or an NVMeenabled storage area network (SAN). The QFX5210 offers a full-featured DCB implementation that provides strong monitoring capabilities on the top- of-rack switch for SAN and LAN administration teams to maintain a clear separation of management. The RDMA over Converged Ethernet version 2 (RoCEv2) transit switch functionality, including DiffServ code point (DSCP) priority-based flow control (PFC) and Data Center Bridging Capability Exchange (DCBX) with Explicit Congestion Notification (ECN), are included as part of the default software.


The Juniper QFX5210-64C Ethernet Switch is a powerful and reliable tool for enhancing your network performance. It offers an impressive range of features, including 10G and 40G ports, high throughput speeds, energy efficiency, and comprehensive layer 3 switching capabilities. With all these offerings and more, you can rest assured that the Juniper QFX5210-64C will make your network run like clockwork.