What do I need to know about VLAN membership and tagging?

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Hello Friends,

I want to buy a VLAN membership and tagging, but before that, I want to need some information about it. If anyone here knows about it please tell me.

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The following are basic principles of VLAN membership and tagging:
• Each port can be a member of an unlimited number of VLANs, but traffic on that port will be slow if it is a member of several busy VLANs. If you plan to make a port a member of multiple VLANs, consider setting up a link aggregation group (LAG) for increased bandwidth and throughput over that connection.
• Each port can only be an untagged member of a single VLAN. If a port is already an untagged member of a VLAN, you cannot add it as an untagged member of any other VLANs.
• All untagged traffic that enters the switch is assigned to the default or native VLAN, which is VLAN 1. VLAN 1 is also the management VLAN on switches that support management VLANs.
• If a port is a member of a link aggregation group (LAG) or you plan to add it to a LAG, do not add it to a VLAN or tag it individually. You must add the LAG to the VLAN as a single unit.
• Best practice involves classifying each port as either an access port or a trunk port. 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.
• Some networked devices recognize 802.1Q tagging, and some do not. If a device does not recognize tags, it rejects any tagged traffic that it receives, so it can only be an untagged member of a VLAN.
• If you are not sure whether a device supports 802.1Q tagging, see the device’s documentation. The following list contains general guidelines that are not applicable in all cases:
o Most printers do not recognize 802.1Q tags.
o If a computer needs to be a tagged member of a VLAN, you must configure a VLAN ID on the network interface controller (NIC) of the computer. All other computers must be untagged.
o Most network attached storage (NAS) devices either support 802.1Q tagging, have multiple NICs with multiple Ethernet ports (which can be added to different VLANs), or both.
o Most Voice Over Internet Protocol (VOIP) phones recognize 802.1Q tags.
o Most wireless access points recognize 802.1Q tags.
o Unmanaged switches and some switches with limited management functions do not recognize 802.1Q tags.
o Most business routers recognize 802.1Q tags. Most home routers do not.

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