CRS Dynamic VLANs. What are they ?

Hello all,

I have configured CRS switch to use VLANS as described here: http://wiki.mikrotik.com/wiki/Manual:CRS_examples and here: http://www.breekeenbeen.nl/2014/12/11/mikrotik-vlan-switching-without-bridging/. It seems everything is up and runnging, but DHCP server on my VLAN interface does not provide clients with addresses and clients does not see each other. I have checked my configuration and think that main reason is Dynamic vlans present on my switch: with VLAN ID=4095 and VLAN ID=4091. I did not create them and I can’t remove them, cause they are dynamic. What are they for and how to get rid of them?? I am sure VLAN ID 4091 overrides my rules and adds unnecessary tag to traffic that must be untagged.

Thanks,

Vadim.