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Virtual LAN (VLAN Configuration (VLAN is identified by its numerical ID…
Virtual LAN
VLAN Configuration
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Create the VLAN, optionally configure its name and state
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A switch that does not have a concept of VLAN, all the packets received are forwarded to the whole broadcast domain.
a broadcast domain is a logical division of a computer network which each node can reach other by broadcast at data link layer.
You can assign VLANs to a set of ports in a switch and configure multiple VLANs on that switch. Ports assigned to same VLAN will be on the same broadcast domain.
The best practice is to assign one IP subnet per VLAN although it is possible to configure multiple subnets per VLAN.
Layer 2 switches forward frames between 2 devices having the same VLAN but not in between 2 different VLANs. To route between different VLANs, a layer 3 switch or router is needed.
Private VLANs
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allows VLANs to be divided into smaller VLANs, hence adding more security. Adding Private VLANs within a VLAN does not require assigning another IP subnet.
a common implementation instance is a provider putting a single router and a single switch in a building in which multiple clients can connect. These clients are separated by Private VLANs, thus, only single IP subnet can be assigned.