Topology Change dlink

Question

Computer networks

In general, straight to the point, because I've already been sick of puzzling over this all day:
Here's what happens in the logs

4514   2017/04/12 19:20:48  Topology changed                                    
4513   2017/04/12 19:20:24  Port 10 link up, 100Mbps FULL duplex                
4512   2017/04/12 19:20:22  Port 10 link down                                   
4511   2017/04/12 19:20:21  Port 10 link up, 100Mbps FULL duplex                
4510   2017/04/12 19:20:19  Port 10 link down                                   
4509   2017/04/12 19:20:14  Port 10 link up, 100Mbps FULL duplex                
4508   2017/04/12 19:17:37  Port 10 link down                                   
4507   2017/04/12 19:12:44  Topology changed                                    
4506   2017/04/12 19:12:08  Topology changed                                      
4499   2017/04/12 18:55:53  Topology changed                                    
4498   2017/04/12 18:50:42  Topology changed                                    
4497   2017/04/12 18:50:06  Topology changed                                    
4496   2017/04/12 18:48:11  Topology changed                                    
4495   2017/04/12 18:48:06  Port 3 link up, 100Mbps FULL duplex                 
4494   2017/04/12 18:48:02  Port 3 link down                                    
4493   2017/04/12 18:47:55  Port 3 link up, 100Mbps FULL duplex                 
4492   2017/04/12 18:47:50  Port 3 link down                                    
4491   2017/04/12 18:47:34  Topology changed                                    
4490   2017/04/12 18:46:58  Topology changed                                    
4489   2017/04/12 18:39:00  Topology changed                                    
4488   2017/04/12 18:38:24  Topology changed

stp config:

config stp version stp
config stp maxage 20 maxhops 20 forwarddelay 15 txholdcount 6 fbpdu enable
config stp priority 32768 instance_id 0 
config stp hellotime 2
config stp mst_config_id name 00:19:5B:ED:8C:AD revision_level 0
enable stp
config stp ports 1-26 externalCost auto edge false p2p auto state enable
config stp ports 1-26 fbpdu disable
config stp ports 1-26 restricted_role false
config stp ports 1-26 restricted_tcn false                                      
config stp mst_ports 1-26 instance_id 0 internalCost auto priority 128

The bottom line is that at the beginning I at least understood approximately what was happening, but now I don’t buy anything at all, so I ask for help from the shaman brothers)

Answer 1

Can stp throw a port down if it doesn't have bpdu guard?! and then in err-disabled...