What is a layer 3 switch?
A layer 3 switch combines the functionality of a switch and router, acting as both to connect devices that are on the same subnet or virtual LAN at lightning speeds. The switch has IP routing built-in, running routing protocols and inspecting incoming packets.
The term “layer 3 switch” describes a device, or multilayer switch, which helps one’s network operate more efficiently. With these sophisticated devices, one can control not only how data moves up and down layers of the OSI model, but also where it goes.
How to Identify Features in Layer 3 Switches
Equipped with 24 Ethernet ports, but no internet access.
How to Setup a Network Switch
Two levels of OSI model
The ideal switches for SMBs
Sometimes, traditional terminology leads to confusion. If an individual is new to computer networking, the name “layer 3 switch” can be misleading. However, switches operate at layer 2 of the OSI model while routers operate at layer 3. Layer 2 switches are easier to use than layer 3 switches for solving problems within four broadcast domains.
Layer 3 switches were originally conceived to improve routing performance on large networks, especially corporate intranets. To understand the purpose, let's step back a bit in time to see how these switches evolved.
If you're experiencing performance issues with your layer 2 switches, e.g. they will stop functioning as more and more devices load up, use the next-gen enhancements to layer 2 enabled by Layer 3 switches. This solves those problems without sacrificing functionality.
One advantage over traditional routers is the layer 3 switch’s router doesn't have WAN ports typically seen on a router. This, coupled with its high performance capabilities through hardware, makes it an ideal means of isolating your wifi network.
Find out more about layer 3 switches
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