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What is native VLAN and tagged VLAN?
A Trunk port (or “tagged port” in the non Cisco world) is a switch port which carries traffic for multiple VLANs. When frames traverse a Trunk port, a VLAN tag is added to distinguish which frames belong to which VLANs. The Native VLAN is simply the one VLAN which traverses a Trunk port without a VLAN tag.
What is tag based VLAN?
Tag-based VLANs are based on IEEE 802.1Q specifications. Traffic is forwarded to VLAN member ports based on identifying VLAN tags in data packets. You can also configure the switch to interoperate with existing tag-based VLAN networks and legacy non-tag networks.
How do you tag a VLAN on a switch?
When the frame reaches the switch port, the switch will add the VLAN tag. The switch port is configured with a VLAN ID that it will put into the tag. Most switch ports will use this mode by default, with VLAN ID 1. When a frame leaves an untagged port, the switch strips the VLAN tag from the frame.
What does VLAN tagging and untagging of ports mean?
If someone could please help me understand. If a VLAN is tagged on a port, it means that data from that VLAN is sent out the port in 802.1q format, which has a VID (a tag) that identifies what VLAN it’s associated with. Also, data received with a VLAN tag is placed in the appropriate VLAN.
Where does the VLAN tag go on an Ethernet frame?
If you are using the switch defaults for VLANs, the VLAN tag that will be placed on the frame is VLAN1. When placing a VLAN tag (also known as an IEEE 802.1Q tag) on the Ethernet frame, the four bytes of data, which make up the VLAN tag, are inserted before the Type field, as shown in the following figure.
How many VLANs are in a VLAN group?
The VLAN Group needed to support the configuration shown in Figure 5.4, “Networks with VLANs and VLAN Group” contains two VLANs, with ID 2 and 3. The VLAN Group also contains two ports for each Oracle VM Server in the network.
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.