Good afternoon.
I have to use CCR1009-8G-1S-1S+ version 6.37.4.
When I update to version 6.38.1 or 6.39rc27 ports 5,6,7,8 lost rx traffic.
I no longer see the devices connected to these ports.
After downgrade to 6.37.4 recovers.
Hi,
Are you running other Mikrotik devices on those ports? Devices that have not been updated to 6.38 or higher?
From the release notes of 6.38:
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.