Why Does Cisco 3560 cascade port fail?

The core switch is an all-optical fiber switch of beidian. On one of the floors, some applications need to be implemented. cisco 3560 is selected, and Port 1 is connected to the network cable transferred from the photoelectric converter, however, if the first port is normal for about 2 seconds, it turns yellow and network communication is interrupted. If you connect to the first port, an error is displayed:
% SPANTREE-7-RECV_1Q_NON_TRUNK: Received 802.1Q BPDU on non trunk FastE
Thernet0/1 VLAN1.
% SPANTREE-7-BLOCK_PORT_TYPE: Blocking FastEthernet0/1 on VLAN0001. Inc
Onsistent port type.
 
If this location is changed to a Dlink switch, the communication is normal;
 
I checked a lot on the Internet and found the solution:
Interface FastEthernet0/1
Spanning-tree bpdufilter enable (add this command to the port)
 
The setting is normal immediately.
 
 
This article is from the "IT life" blog