Vlan default what does it mean?

Question

Computer networks

Hello, I can’t understand what the default vlan is responsible for? The network is small, everything fits on 1 switch. There are suspicions that this is the vlan that the switch itself sees (d-link dgs-1210-52). If you remove a port from this vlan, the computer immediately stops seeing everything. Although a rule has been created for this port that a certain circle of people should see it. Am I right? Or because the port is removed from this vlan'a, the router does not see it? I could not find any information on the Internet on this topic.

Answer 1

default (untagged) vlan is the vlan number that is assigned to incoming packets that do not have a vlan tag like normal access traffic.
Remember, there is no untagged traffic inside the switch. everything comes with a tag. The label is placed at the entrance to the switch and removed at the exit if the vlan number corresponds to the untagged vlan number for the port, and if you remove all vlan from the port, then neither incoming nor outgoing traffic will go to it.
If you have written any thread ACL on the port, then they work after.
The time may be without default (untagged) vlan, but this is not your case.

Answer 2

in general, default vlan is the vlan that is present on the device out of the box; the vlan that will be on the switch port if the administrator has not taken any action to change the vlan number.
if the port to which the router is connected has one vlan number on the switch, and the port to which the device is connected has a different vlan number, then the router and the device will not see each other through this switch.
you would write why you needed manipulations with vlans, maybe someone will express their opinion. and if so, "I remove the port from the vlan and stop seeing everything" - the result is quite expected and correct.

Answer 3

vlan default is most often a vlan with tag 1, which is present on the switch out of the box.

Answer 4

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Answer 5

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