HP Cisco Nexus 5000 Cisco Nexus 5000 Series Switch CLI Software Configuration - Page 187

Send feedback to [email protected] 10 C H A P T E R Configuring STP Extensions Cisco has added extensions to the Spanning Tree Protocol (STP) that make convergence more efficient. In some cases, even though similar functionality may be incorporated into the IEEE 802.1w Rapid Spanning Tree Protocol (RSTP) standard, we recommend using these extensions. All of these extensions can be used with both RPVST+ and MST. The available extensions are spanning tree port types, Bridge Assurance, BPDU Guard, BPDU Filtering, Loop Guard, and Root Guard. Many of these features can be applied either globally or on specified interfaces. Note Spanning tree is used to refer to IEEE 802.1w and IEEE 802.1s. If the text is discussing the IEEE 802.1D Spanning Tree Protocol, 802.1D is stated specifically. This chapter includes the following sections: • Information About STP Extensions, page 10-1 • Configuring STP Extensions, page 10-5 • Verifying STP Extension Configuration, page 10-13 Note See Chapter 8, "Configuring Rapid PVST+" for complete information on STP and Rapid PVST+ and Chapter 9, "Configuring MST" for complete information on MST. Information About STP Extensions This section discusses the following topics: • Understanding STP Port Types, page 10-2 • Understanding Bridge Assurance, page 10-2 • Understanding BPDU Guard, page 10-3 • Understanding BPDU Filtering, page 10-3 • Understanding Loop Guard, page 10-4 • Understanding Root Guard, page 10-5 OL-16597-01 Cisco Nexus 5000 Series Switch CLI Software Configuration Guide 10-1