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juniper QFX Series QFX5220-128C

CurrentNetwork4U fixed switch
Juniper juniper QFX Series QFX5220-128C4U fixed switch128 ports25.6 Tbps

The Juniper QFX5220-128C is an ultra-dense 4U datacenter spine switch delivering 128 ports of 40G/100G QSFP28 in a compact rack enclosure. Powered by dual Broadcom Tomahawk 3 ASICs providing 25.6 Tbps of line-rate forwarding capacity, the QFX5220-128C is engineered for high-density 100G spine tiers in hyperscale datacenters, replacing larger modular chassis systems. Hardware traders view this model as an optimal footprint consolidator for massive 100G leaf-spine fabrics.

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Specifications

Brandjuniper
FamilyQFX Series
Form factor4U fixed switch
ReleasedSep 2019
Ports128x 40G/100G QSFP28 ports
Switching capacity25.6 Tbps / 8.4 Bpps forwarding capacity
Form factor4U rack-mounted fixed-configuration chassis
Density128 wire-speed 100GbE ports in just 4U of rack space
ReliabilityN+1 redundant power supplies and hot-swappable cooling modules

Generations

Works together

How the juniper QFX Series QFX5220-128C connects to servers, storage and the network: 3 ways, with the parts and products on each path.

iSCSI and NVMe/TCP over EthernetFile storage (NFS and SMB)Hyperconverged cluster

iSCSI and NVMe/TCP over Ethernet

Keep the speed the same at all three points: a 25GbE server, a 25GbE switch port and a 25GbE array port. Mixed speeds work but the slowest link sets the pace.

Servers

Adapters for the server

Storage

Optics

iSCSI and NVMe/TCP over Ethernet: how it fits together

File storage (NFS and SMB)

Front-end ports face the clients; back-end ports (on scale-out systems) connect the nodes to each other and need their own switch pair.

Servers

Adapters for the server

Storage

Optics

File storage (NFS and SMB): how it fits together

Hyperconverged cluster

Plan at least two 25GbE ports per node to two switches; all-NVMe clusters often move to 100GbE.

HCI nodes

Adapters for the server

Optics

Hyperconverged cluster: how it fits together

Plan and size it

Check compatibility with Juniper

Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Juniper has tested with the juniper QFX Series QFX5220-128C.

Equivalent models from other brands

FAQ

How does the power efficiency of the 128C compare to a modular chassis?

The fixed 4U design consumes significantly less power and space than equivalent 128-port modular chassis architectures.

Does the QFX5220-128C support breakout to 4x 25GbE?

Yes, it supports breakout cables, yielding up to 512 25GbE interfaces across the chassis.

Buying or selling QFX5220-128C?

New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.

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