Hi,
We have a network with a lot of Mikrotik devices.
Allso we have somt Pont to Point and Point to Multipoint connections (mikrotik).
On one Point to Point connection we have problems with the RSTP.
This works perfect for years but now we have upgrade to 6.38.1 we have problems.
I have to set the protocol to none on both RB-SXT-AC devices in that Point to Point connection than it works.
When I set the protocol to RSTP (as it was for years) I cant reacht all other devices behind the Point to Point connection.
What could be wrong?

Hi 49er!

Can you tell us from what older version this problem don't happen? From what version you had no problems?

Regards,

same here

guys, is very important to read change-logs BEFORE!!! upgrading:

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 recommended procedure is to start by upgrading the remotest routers and gradually do it to the Root Bridge device.
If after upgrade you experience loss of connectivity, then disabling STP/RSTP on RouterOS bridge interface will restore connectivity so you can complete upgrade process on your network.

I read it already and upgraded all of them to 6.38.1, then to 6.39rc25. Problem appeared on both versions.
I use Vlans on that bridge and those vlans are bridged to ethernet ports etc. So, as I understand, I can only use RSTP on my first bridge/trunk?

Как теперь делать кольца на уровне vlan ?

Раньше все это прекрасно работало.

Как теперь делать кольца на уровне vlan ?

Раньше все это прекрасно работало.

This is english speaking forum only.

Как теперь делать кольца на уровне vlan ?

Раньше все это прекрасно работало.

This is english speaking forum only.

I apologize.

How do I now make the ring at the vlan level?
Previously, all this worked perfectly.