Chapter 10. Protecting the Spanning Tree Protocol Topology
Root Guard—. This section discusses how to protect the STP topology against unexpected switches advertising to become the Root Bridge.
BPDU Guard—. This section covers unexpected STP advertisements on switch ports configured for PortFast, where single hosts connect.
Loop Guard—. This section discusses how to protect the STP topology against the loss of BPDUs from the Root Bridge on a switch port.
UDLD—. This section presents a feature to detect and protect against unidirectional, switch-to-switch links.
BPDU Filtering—. This section explains how to filter BPDUs on a switch port ...