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What's the difference between vlan types?
I have a dlink des-1100-24 switch. He knows how to vlan, but in the settings there are already three types:
802.1Q VLAN
802.1Q Management VLAN
Port-Based VLAN
What is the difference between them? I didn't find anything clear in the documentation.
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802.1Q VLAN
Basic, encompassing, protocol.
Information (an additional header) with the VLAN number is added to the packet when it is sent. Such a packet is called/is a tagged VLAN number (tagged). Accordingly, when receiving, the VLAN number is checked against the allowed one, and if it does not match, the packet is discarded. There are several places to add / control, as well as ways.
Port Based VLAN
A kind of protocol in which the VLAN number is hardwired to the physical port of the device. An incoming untagged packet is marked with exactly the number that is registered on the port, an incoming/outgoing tagged packet is checked to ensure that the number matches the number registered on the port, otherwise the packet is dropped. Several numbers can be assigned to the port as allowed incoming/outgoing for tagged traffic, but strictly one for untagged traffic. An exception - the second one can be Voice VLAN, but this situation is served by a separate add-on protocol (besides, it is always MAC-based).
802.1Q Management VLAN
The VLAN number to which the IP address of the internal management interface is bound. From another VLAN, the interface at this address is unreachable. The internal interface can have several addresses from different non-overlapping subnets, then each will be tied to its own Management VLAN.
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