Multiple VLANs on one port

RouterOS General
1

First, hello to everyone :slight_smile:

In a week or so I’m trying to setup MT RouterBoard 750:
-one port is used to get Internet access from my ISPs router (that was easy to accomplish)
-second port should be used for connection to switch
-on a switch we have two VLANs (50 i 55) that should be used for two different WLANs

So, I’ve tried to add VLANs on MT:
-created a bridge, added VLANs and second port
-on a switch (Cisco SG300-28P) port that is connected to MT router is configured as trunk (1UP, 50T, 55T)

My “top” question is: Is it possible to attach two or more VLANs to one port on MT and send them to switch (because mentioned configuration does not working)? If not, should I configure this like: attach one VLAN to one port on MT, and each one to a separate port on switch?

Tnx

Request help! RouterOS Configuration screwed up.
2

Hi,
Your requirement is to configure the port 2 as a trunk.
If you add the VLAN interface and port2 into the bridge, port2 will act as access port.
Follow the below procedure:
add—>bridge
add—>port2 into bridge
add vlan and select interface as bridge.

3

balakumarm7, thank you for reply.
when i setup things like you suggested, i’m capable to establish connection only when port on a switch is configured as General(50UP, 55U) - and that only works for WLAN in VLAN50, the other one can not establish a connection.
If configuration is Trunk(1UP, 50T, 55T), none of WLANs can make a connection.

But, when I add VLANs to a bridge, and second port also, with General port (50UP,55U) on switch, I can make a connection, but everything is slow…

4 
/interface vlan add vlan-id=50 interface=ether2 name=ether2-vlan50
/interface vlan add vlan-id=55 interface=ether2 name=ether2-vlan55
/interface bridge add name=vlan50
/interface bridge port add bridge=vlan50 interface=ether2-vlan50
/interface bridge add name=vlan55
/interface bridge port add bridge=vlan55 interface=ether2-vlan55

I like to create bridges for my vlans so it’s easy to tie the same vlan together on multiple ports. Add your ip addresses to the vlan interfaces. Add firewall masquerading and you’re good to go.

5

zimage, thank you too :slight_smile:
it seems like there is problem with configuration of cisco switch. Everything works great, but only for one VLAN - the one that is configured as PVID and untagged. To be specific, if port on a switch is configured as 55UP, 50U - WLAN on VLAN 55 works great, but clients on WLAN that is dedicated to VLAN50 can’t obtain ip address. When I change configuration to 50UP, 55U, WLAN on VLAN 50 works great, but WLAN on VLAN 55 does not…

6

You should be able to add the vlan id’s on the Mikrotik interface:

/interface vlan add vlan-id=50 interface=ether2 name=ether2-vlan50
/interface vlan add vlan-id=55 interface=ether2 name=ether2-vlan55

And then set the vlan interface mode to trunk and the port on your Cisco to 1UP, 50T, 55T.

You will have to treat each vlan interface as a standard interface (each interface needs a separate network and possibly masquerading in the firewall if private IPs).

It is my understanding that you only need to use a bridge on the Mikrotik if you are creating untagged ports. Assigning a bunch of vlans to a physical interface essentially turns it into a vlan trunk port.