What is VLAN configuration on Cisco router?

A VLAN is a switched network that is logically segmented by function, project team, or application, without regard to the physical locations of the users. VLANs have the same attributes as physical LANs, but you can group exit stations even if they are not physically located on the same LAN segment.

Do routers have VLANs?

Routers use subinterfaces as the means to have an interface connected to a VLAN. 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.

Why do we configure VLANs?

VLANs reduce the incidence of collisions and decrease the number of network resources wasted by acting as LAN segments. Data packets sent from a workstation in a segment are transferred by a bridge or switch, which will not forward collisions but will send on broadcasts to every network devices.

How do VLANs work with WIFI?

VLAN tags can tie these wireless security and performance measures to your wired network. For example, all wireless APs could be grouped into a single VLAN, assigned an identifier not used by any Ethernet workgroup. Edge switches could apply the wireless VLAN’s tag to packets received from any AP.

Why VLAN is used in router?

VLANs free up bandwidth by limiting node-to-node and broadcast traffic throughout the network. VLANs enhance network security. VLANs create virtual boundaries that can be crossed only through a router. Therefore, you can use standard, router-based security measures to restrict access to a VLAN.

Can routers do VLAN?

There are three options available in order to enable routing between the VLANs: Router with a Separate Physical Interface in each VLAN. Router with a Sub-Interface in each VLAN.

Should I have VLAN on or off?

Do not disable it. VLANs must exist inside the switch to keep the WAN and LAN networks separate. If you uncheck the box all 7 ports (5 external and two CPU) will be fully linked to each other like an unmanaged switch. The switch is specialized hardware.