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Do Routers Have Vlans?

Maya Lin-Takahashi • • 6 min read
Do Routers Have Vlans?
2 Answers. You forget that routers can have virtual interfaces. You can have many, many different VLANs, each with its own network, on virtual interfaces of a single physical interface. Routers only need to terminate the layer-2 LANs.

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Then, do you need a router for VLAN?

Device is Same but Vlans define separate networks inside same switch. Separate Network means, each network has own broadcast domain. you don't need router when switch is not able to provide routing function. If you have L3 Switch, you can configure routing in same device.

Subsequently, question is, can different VLANs communicate without a router? Yes, you can configure a switch with “vlan-bridging”, whereas multiple VLANs can communicate between each other. That said, bare in mind the difference that IP packets, at layer 3 of the OSI model, will not communicate between subnets without a router.

Keeping this in consideration, what is VLAN on router?

Routers connect LANs, routing the traffic to each appropriate port. A virtual LAN (VLAN) is a local area network that maps devices on a basis other than geographic location, for example, by department, type of user, or primary application.

How does a router differ from a VLAN?

A layer-2 switch operates at the data link layer, and a router operates at the network layer. How does a router differ from a VLAN? VLANs create multiple subnets, but can only send messages to computers on the same VLAN.

Related Question Answers

Can two VLANs have the same IP address?

Using the Same IP Address in Two Different VLANs. The OSA-Express Layer 2 implementation allows the hosts to manage IP addresses and ARP cache, so it is possible to have a single guest LAN segment (or VSWITCH segment) where two different hosts use the same IP Address on different VLAN groups.

Can VLANs span across routers?

3 Answers. If you mean should you use a router to connect two separate switches to each other at Layer 2 then probably not no. Switches are designed to switch within VLANs, and routers route between networks (VLANs). Cisco routers can bridge, but that is an expensive way to switch.
Maya Lin-Takahashi
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Maya Lin-Takahashi

Maya is a hardware enthusiast who tests and reviews smart home devices, smartphones, wearables, and audio gear. She focuses on practical consumer value and build quality.