STP fine tuning the spanning tree protocol
Spanning Tree Protocol (STP) uses various configurable features to safeguard the stability of an STP topology. These features include:
Links:
https://networklessons.com/spanning-tree/spanning-tree-bpduguard
https://networklessons.com/spanning-tree/spanning-tree-bpdufilter
https://networklessons.com/spanning-tree/spanning-tree-rootguard
https://networklessons.com/spanning-tree/spanning-tree-loopguard-udld
https://www.ciscopress.com/articles/article.asp?p=2995351&seqNum=3