Quick Answer: Do VLANs Have To Be On Different Subnets?

Can VLANs talk to each other?

Two separate VLANs must communicate through a layer-3 device, like a router.

Devices on a VLAN communicate with each other using layer-2.

When a host on one VLAN wants to send something to a host on another VLAN, it must use a layer-3 (e.g.

IP) address..

Does a VLAN need an IP address?

VLANs and Address Plan As each VLAN is a different network, they need their own address subnet (IPv4 and IPv6). The Campus Core switch will route between each VLAN (so called L3-switch: an ethernet switch which has some L3 routing capability). These IP addresses are also documented in the master IP address plan.

How do you connect two subnets together?

How to Connect Computers That Are on 2 Different SubnetsConnect the computers to the network. … Connect the routers to each other. … Enable a routing protocol in each subnet’s router. … Allow time for the routing tables to update. … Log into one of the computers on a subnet and issue a trace route command to the computer on the other subnet.

Can a switch route between subnets?

Is it possible to route between two subnets using a layer 3 switch? Yes, it is. You need to create VLANs for the subnets and route traffic (Inter-vlan routing) between them and than on the switch. A L3 switch is also a router so it understands Layer 3 routing.

What are three advantages of VLANs?

VLANs provide a number of advantages, such as ease of administration, confinement of broadcast domains, reduced broadcast traffic, and enforcement of security policies. VLANs provide the following advantages: VLANs enable logical grouping of end-stations that are physically dispersed on a network.

How many VLANs can you create?

In a cisco network device be it switch or router, it is possible to create 4096 VLANs. In normal mode, only VLAN ID 2 to 1001 can be created. Normally the untagged default VLAN ID is 1 but any VLAN can be untagged with the command “switchport trunk native vlan 2” in that command, native VLAN is 2 (which is untagged) .

What is the difference between VLAN and subnet?

A VLAN is an Ethernet level concept, a subnet is an IP level concept. A VLAN splits an Ethernet network into multiple logically seperate Ethernet networks. A subnet defines which hosts a host will try to communicate with directly verses which hosts will need to go via a router.

Should I use VLAN or subnet?

Yes if you separate a network with different VLANs you are creating separate networks like in subnetting. If you use VLAN to create different broadcast domain , subnetting becomes necessary as a part of it as you can not configure the two VLAN’s with the same IP range.

Does a switch create a subnet?

No, switches are not just simplified routers. … Switches create networks, routers connect distinct networks together. Switches operate using only MAC-addresses, while routers also use IP addresses. Switches have many ports in the same subnet, while routers can only have one port per subnet.

How do I know my VLAN?

To find your VLAN (on a Windows XP machine), go to “Start Menu”,then click the return (enter) key on your keyboard. This runs a command prompt. Type in “ipconfig” and hit return again. You will see your IP Address, your Subnet Mask and your Default Gateway.

Do trunk ports need IP address?

The router needs to have an IP address/mask associated with each VLAN on the trunk. However, the router has only one physical interface for the link connected to the trunk.

Do VLANs speed up networks?

vlans won’t generally do anything for the speed of your network and unless you really need to segregate traffic I wouldn’t set them up. … 100 devices on a network isn’t a big deal. The vlans are used to break up networks at the switch level for servers in one, desktops in another, etc allowing for security between vlans.

Can you have 2 VLANs on the same subnet?

Of course you can do that, but it is not the recommended way. VLANs use software to emulate separate physical LANs. Each VLAN is thus a separate broadcast domain and a separate network. As you have identified, routing between these VLANs would be difficult, because they are the same subnet.

Can you have 2 different subnets on the same switch?

You can use the same switch for multiple subnets, but you need to you VLAN’s that is what they are there for, unless you switch won’t support VLAN’s. First time your switch gets a MAC address back that has an IP addresses in more than one subnet it’s gonna freak out.