Chapter 9. Protecting the Spanning Tree Protocol Topology
This chapter covers the following topics that you need to master for the CCNP SWITCH exam:
Protecting Against Unexpected BPDUs—This section covers the Root Guard and BPDU Guard features, which protect against unexpected root candidates and unexpected BPDUs, respectively.
Protecting Against Sudden Loss of BPDUs—This section discusses the Loop Guard and UDLD features, which detect and protect against the loss of root bridge BPDUs and conditions causing unidirectional links, respectively.
Using BPDU Filtering to Disable STP on a Port—This section explains how to filter BPDUs on a switch port to prevent the port from participating in STP altogether. Bridging loops are neither detected nor ...
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