VLAN question

RouterOS General
1

Hello… quick question
if i tag the native vlan1 on a switch do i have to create vlan1 also on mikrotik ???

question2…
if vlan1 interface is created on mikrotik will it be 802.1Q tagged interface…?
if so how come my laptop works when i plugg it into vlan1 interface

thanks

2

Answer 1: Yes.

Answer 2:
It depends on the direction you look at the interface.
When you create a vlan interface attached to a physical ethernet port, it’s tagged from the ethernet side and untagged in the router side.
Add this vlan interface to a new bridge.
You can then create access ports by simply adding physical ethernet ports to that bridge.
If you need it tagged again, create another vlan interface with the appropriate ID and attach it to the physical port you need and the bementioned bridge.

Answer 2b:
If your laptop successfully connects to the port you think the tagged vlan1 comes from, it’s most likely still untagged for whichever reason.

-Chris

3

Thanks Chris…
i created a bridge and added vlan1 and wlan1 … my laptop successfully connects to vlan1…
is wireless always untagged?
if i a create a bridge with a vlan and an interface will it be tagged or untagged…
this is confusing me
is there a rule for this or what???

Thanks for your help

4

The vlan interface you create acts as sort of a tagger/untagger.¨
With attaching it to a physical port, you extract all tagged traffic for the specific vlan on this interface and untag it.
When binding it to a bridge, the bridge only sees untagged traffic coming from this vlan interface.
Traffic coming from the bridge into this vlan interface gets tagged and sent out.

Hope, this makes it a bit clearer.
-Chris

5

Thanks Chris for your clear answer…
from what you said i can extract:
in case of wlan1+vlan1 (or any other vlan) is in the bridge and a laptop connected wirelessly to this bridge (ap-bridge mode)
so the vlan traffic will be always UNTAGGED and the laptop gets connected to this vlan… correct me if i’m wrong.

6

Now you got it.
Cheers
-Chris