What triggers a topology change in spanning tree? How are TCN BPDUs propagated through the network?

Oct 3, 2008 ... Re: Starved BPDU's. I noticed from your output that the topology change counter seems very high, around 90000. Since your edge ports should not ... Aug 17, 2021 ... Based on the Campus Fabric (SPX) scale setup, the high threshold value is 1000 BPDUs per second and the low threshold will be 10% less than the ... In this Cisco CCNA training tutorial, you'll learn about Spanning Tree Portfast, BPDU Guard, and Root Guard. Scroll down for the video and also text tutorial. Oct 8, 2016 ... The service VLAN should encapsulate the customer BPDU just like customer VLANs. BPDU should pass through the service network just like it was a ... Jun 8, 2020 ... After BPDU protection is enabled on a switch, if an edge port on the switch receives a BPDU, the switch will shut down the edge port, while ... Aug 22, 2023 ... BPDU Guard is a feature that defends the Layer 2 Spanning-Tree Protocol (STP) topology against BPDU-related threats and is designed to protect ... The BPDU guard, an enhancement to STP, removes a node that reflects BPDUs back in the network. It enforces the STP domain borders and keeps the active topology ... spanning-tree bpdu-guard ... Enables the BPDU guard on the selected switch interface. When BPDU guard is enabled, interfaces receiving MSTP BPDUs become disabled. Apr 6, 2023 ... All spanning-tree protocols use a special type of frame called bridge protocol data units (BPDUs) to communicate with each other. Other devices ... If you have not configured a port as an edge port, you can still configure BPDU protection on the interface by using the bpdu-block command under the set ...