SG300 problem with STP - Root Bridge ID does not work via WIFI

[Dawid Komarnicki]

Hi,

I have a problem with STP, switch (SG300-28) unable to correctly set Root Bridge ID and all the time thinking that he is primary switch in the network

The problem occurs only when the switches are connected via wifi. (this is requirement - two antennas OSBRiDGE 5GXi and bridge mode)

I ruled out an error in the configuration, I brought a switch to the company's headquarters and connected via cable - It works OK.

In branch office i tried with two SG300 - always a problem with Root Bridge ID.

when I use an unmanaged switch network works perfectly, unfortunately, I need SG300 and its functionality

What could be the problem?

[Masoud Pourshabanian]

Hello,

I suppose you have configured STP correctly since you are saying that it works OK when it is connected by cable. SG300 might not receive BPDU probably through wireless link. Try to debug STP on SG300 to see you get any BPDU message.

debug spanning-tree bpdu receive

Does it cause problem in your headquarter?

Changing the STP timer may help if it receives some  BPDU message.