Problem with VLAN

Hello,
I have a strange problem. I have connected two VLAN’s on two mikrotik routeroard devices (2011+1036) through airmax wifi link, and it works perfect, and everything is OK.
But I have tried to replace the second-end routeboard with my Huawei Smartax device with the same VLAN ID, but it did not pass.
Now I have converted my second-end routerboard device to bridge only, with no more configurations and it worked perfect, so I do not really know what is happening, the bridged mikrotik should do nothing else but bridging the two ports!!!
I tried to change the MTU but nothing changed.
And I do not want to use the second-end routerboard.
Thanks in advance.
mik-pro.png

Does the MikroTik 1036 have spanning-tree enabled? if so is it RSTP? What code version is it on?

For the 1036 mikrotik, I am not using vlan on bridge, I am just using my VLAN on the port 9.
For the 2011, I am using the bridge with rstp enabled.
the first-end routerboard’s version is 6.38.5
the second-end routerboard version is 6.35

Are the Ubnt units aware of the VLAN or is it just passing through them as the native VLAN? If so you may have to configure the Huawei device as an access port on VLAN 3000.

I am just passing the VLAN through them.
I will check the mode of the port if it is access.

Thanks

Is the MikroTik port that is connected to the Ubnt configured as port to a bridge that is VLAN 3000?

/interface bridge port add interface=eth1 bridge=br3000

This would confirm how you’re sending it to the Ubnt gear. I’m looking to determine if it’s moving through the equipment tagged as 3000 or untagged.

Thanks for your reply,
About making the port mode as access port, it did not help me, because I have two VLANs (3000, 4000), I am sorry that I did not mentioned this, to simplify the case.

No, there is no bridge, I put the VLAN on the port 9 (which is connected to the ubnt ap) directly.

Use current bugfix 6.37.5, or do a full cutover on your second-end routerboard to 6.38.5

This is probably the indirect cause :

What’s new in 6.38 (2016-Dec-30 11:33):

Important note!!!
RouterOS v6.38 contains STP/RSTP changes which makes bridges compatible with IEEE 802.1Q-2014 by sending and processing BPDU packets without VLAN tag.
To avoid STP/RSTP compatibility issues with older RouterOS versions, upgrade RouterOS to v6.38 on all routers in Layer2 networks with VLAN and STP/RSTP configurations.

the first-end routerboard’s version is 6.38.5
the second-end routerboard version is 6.35