Hello All,
I have the following task:
Configure MT with two interfaces: eth1 and eth2, both are trunk.
Untaged (Native) VLAN on eth1 is 10, but on eth2 untaged is VLAN 20.
Switch_1(CISCO) -- Native 10 -- MikroTik -- Native 20 -- Switch_2(CISCO)
ICMP from interface vlan 20 Switch_1 should go Taged to MikroTik and the Untaged to Switch_2.
Exept vlans 10,20 Switch_1 to MT Link has vlan 30, which should not exist on Link MT - Switch_2.

The way how I tried to resolve this is not working. (and I don't understand why)
1. I created new VLAN interfaces:
interface vlan 20 on eth1 (eth1_vl20)
interface vlan 10 on eth2 (eth2_vl10)
2. Also new Bridges:
Bridge_1
Bridge_2
3. And assigned interfaces to Bridges:
eth2, eth1_vl20 -> Bridge_1
eth1, eth2_vl10 -> Bridge_2

Result: No connections

Can you please help me get a point how to change Native VLAN between trunk ports in MT.

Best Regards, Andrei

The best advice is to tag everything as it leaves the switch going to the Mikrotik. No native on the trunk port going to the Mikrotik.

So Mikrotik to Switch all tagged
switch to other devices run in hybrid mode as needed.




If you don't want to do that the Mikrotik's switch can do what you are asking depending on the model you have. (VARIES BY MODEL)

There are two ways to solve this

1. Set the cisco switch to tag the native vlan - this is a global command

2. Change the native vlan on tje cisco switch to a vlan number you will never use

This same problem was solved in a dot1q thread recently. Ill see if I can dig it up and post it

Here you go! Hope this helps!

http://forum.mikrotik.com/viewtopic.php?t=75930