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How does a VLAN work on a switch?
Virtual Local Area Networks (VLANs) separate an existing physical network into multiple logical networks. Thus, each VLAN creates its own broadcast domain. Communication between two VLANs can only occur through a router that is connected to both. VLANs work as though they are created using independent switches.
Does every port on a switch must be part of a VLAN?
A virtual local area network (VLAN) is a logical grouping of ports which is independent of location. A single VLAN (and the nodes connected in a single VLAN) will behave in the same way as if it was a separate Layer 3 network. VLAN membership need not be limited to sequential ports or even ports on the same switch.
Is it possible to configure multiple VLAN’s on a single port of a switch?
Some non-switch network devices DO allow trunk mode on their interfaces: For instance, server network cards will often allow trunk connections for virtual machines to communicate over multiple Vlans using a single physical interface. And some WAPs will allow trunked interfaces, so to support multiple WiFi network SSIDs at the same time.
How does a switch keep track of the VLAN?
Switches keep track of the Vlan by tags, which are identifiers that identify which Vlan a packet belongs to. Access ports are designed to plug an end-user device into, like a computer or printer. Access ports are also known as “untagged” ports, since an access port will strip the Vlan tag from the packet.
Is the vlan interface on my router down?
* VLAN interface exists on the router and is not administratively down. * At least one L2 (access port or trunk) port exists and has a link up on this VLAN.
What do you need to know about VLANs?
An access port is a member of a single VLAN and connects to a computer, printer, or other device on the edge of a network. A trunk port connects the switch to a router or to other switches; it must participate in multiple VLANs because all traffic that passes between the switch and the rest of the network must go through that port.