100G switch • QSFP28 • Leaf & spine • L3 managed

QSFP28 100G Optical Switch

A 100G switch is chosen on its port configuration, not on its total throughput: how many servers to connect, at what speed, and how many uplinks to reach the core. Our L3 managed chassis cover access as well as spine, with MLAG, EVPN-VXLAN and RoCEv2.

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L3 managed 100G QSFP28 Ethernet switch ELFCAM
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Choose my 100G switch in 30 seconds

Two questions — we show you the chassis whose port configuration matches your architecture.

Step 1 What role in your network?
Step 2 Your servers connect over… (optional)

Leaf & spine: which switch goes where?

A modern fabric has two roles only — and they do not call for the same chassis.

The leaf (access)

This is where the servers plug in: plenty of 10G or 25G ports, and a few 100G ports going up to the spine. A 48 × 25G + 8 × 100G is the most common configuration today.

The spine (core)

It sees no server at all: only 100G links to the leafs. Hence an all-QSFP28 chassis such as the 32 × 100G, with front-to-back airflow suited to hot and cold aisles.

MLAG and stacking

Two leafs in MLAG present a single aggregated link to the server while remaining two separate devices: a failure or an upgrade does not cut the service.

EVPN-VXLAN

The overlay that lets you stretch a VLAN between racks without stretching the broadcast domain — the basis of an IP fabric that scales.

Comparison of port configurations

The line that matters is the access ports: that is what sets how many servers you can connect.

RefAccess portsQSFP28 uplinksRoleWorth noting
2901324 × 10G SFP+2 × 40/100GLeafThe most compact of the range
2710048 × 10G SFP+8 × 100GLeafTrident 3, 1.28 Tbps, dual AC power supply
2710148 × 1/10/25G SFP288 × 40/100GLeafTrident 3-X7, 2 Tbps
2882448 × 10G RJ458 × 100GCopper leafThe only one connecting servers over copper
2890248 × 10/25G SFP288 × 40/100GHigh-density leafApollo cloud management
27104—32 × 100GSpineFront-to-back airflow, flexible 10/25/40/50/100G

The ports are empty: remember the modules

A switch ships without optics. Every port you use needs a module — or an AOC/DAC cable — and that budget line often exceeds the chassis itself.

100G uplinks

QSFP28 ports: 100G SR4 module on MPO/MTP for within the rack, LR4 on duplex LC for long reaches, or a DAC cable between two neighbouring racks.

10G and 25G access

SFP+ and SFP28 ports: 10G or 25G modules depending on the server's network card. The two formats are not interchangeable.

Coding compatibility

Our modules are coded for the brand of the switch and factory-tested before shipping — the port does not reject them at boot.

Configurator

The modules page carries a configurator that starts from speed and reach and ends on the right reference.

Our 100G QSFP28 switches

See also

QSFP28 & SFP28 modules

The optics that populate the ports of these switches.

10G SFP+ switches

For infrastructures that do not need 100G yet.

Racks & enclosures

House the chassis and organise the patching.

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FR36844111856 FR72942871351 ES00284989993 ITN0078120C DE340181882 GB367772843
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