Good day...

Recently we facing a lot of the RB433 Ethernet 1 port downgrade or the Hang issue, most we need to reboot to resolved it, but it will repeat again, does any one facing this?

What exactly do you mean by downgrade? What device is connected to ether1? What link status is reported by RouterOS and Ethernet LEDs? Perhaps ether1 is bridged and jammed by bridge loop?

What exactly do you mean by downgrade? What device is connected to ether1? What link status is reported by RouterOS and Ethernet LEDs? Perhaps ether1 is bridged and jammed by bridge loop?

Hi kirshteins...
The symptom is like this..

1) The AP side eth1 connected to the 3com manageable switch, and it suddenly from 100Mbps downgrade to 10baseT .
2) If we change the switch port, it will help, may 1 day, then repeat again the same thing.
3) The setting for the bridge port is with RSTP, and it's running just wds wireless link with star topology.
4) The customer end mostly is connected cisco router, when our nms not able to ping the customer router, we just need reboot the CPE (wireless working fine), then the connection will resume (eth1 hang).

is there anyway to see what's the root cause of this..
only this month, in my network, i having 20 more unit facing this issue, watch dog just to help temporary.

You can generate supout.rif file after problems occurred and send it to support@mikrotik.com