Outline

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Module 3: Spanning-Tree Protocol

Module Overview |

3.1

Spanning-Tree Protocol Operation

3.1.1 | STP concepts
3.1.2 | Broadcast loops
3.1.3 | Bridge-table corruption
3.1.4 | Bridge priority
3.1.5 | Path Cost
3.1.6 | Port ID

3.2

STP Processes

3.2.1 | STP decisions and BPDU exchanges
3.2.2 | Three steps of STP convergence
3.2.3 | Electing the root bridge
3.2.4 | Electing root ports
3.2.5 | Electing designated ports
3.2.6 | STP states
3.2.7 | STP timers
3.2.8 | BPDU format
3.2.9 | Topology changes and STP

3.3

STP Enhancements

3.3.1 | Delay in STP updates
3.3.2 | PortFast
3.3.3 | UplinkFast
3.3.4 | BackboneFast

3.4

802.1w Rapid Spanning-Tree Protocol

3.4.1 | Rapid Spanning-Tree Protocol
3.4.2 | RSTP states
3.4.3 | RSTP port roles
3.4.4 | RSTP timers
3.4.5 | RSTP BPDU format

3.5

Evolution of Spanning Tree

3.5.1 | PVST +
3.5.2 | Enhanced PVST +
3.5.3 | MST (802.1 s)
3.5.4 | Load balancing
3.5.5 | Switchport tuning using BPDU guard
3.5.6 | Switchport tuning using root guard

3.6

STP Configuration

3.6.1 | Default STP configuration
3.6.2 | Enabling and disabling Spanning-Tree Protocol
3.6.3 | Modifying the root bridge
3.6.4 | Setting the priority for ports and VLANs
3.6.5 | Setting the port cost
3.6.6 | Configuring switch priority of a VLAN
3.6.7 | Modifying default timers

3.7

Tuning, Verifying, and Troubleshooting Spanning-Tree Protocol

3.7.1 | Configuring PortFast
3.7.2 | Configuring UplinkFast
3.7.3 | Configuring BackboneFast
3.7.4 | Configuring BPDU guard
3.7.5 | Configuring root guard
3.7.6 | Configuring load balancing
3.7.7 | Verifying STP, RSTP, and MTSP configuration

3.8

RSTP and MST Configuration

3.8.1 | Default RSTP and MSTP configuration
3.8.2 | RSTP and MSTP configuration guidelines
3.8.3 | Enabling RSTP and MSTP
3.8.4 | Configuring the MST root switch
3.8.5 | Configuring MST switch priority
3.8.6 | Configuring MST path cost
3.8.7 | Configuring MST port priority
3.8.8 | Configuring MSTP timers
3.8.9 | Configuring maximum hop count

3.9

EtherChannel

3.9.1 | EtherChannel explained
3.9.2 | Frame distribution
3.9.3 | EtherChannel methods
3.9.4 | Port Aggregation Protocol (PAgP)
3.9.5 | Link Aggregation Control Protocol (LACP)
3.9.6 | Modifying port cost for EtherChannel groups
3.9.7 | EtherChannel configuration guidelines
3.9.8 | Configuring Fast EtherChannel

3.10

Hands-on Lab Exercises

3.10.1 | STP default behavior
3.10.2 | Use network inspector to observe STP behavior
3.10.3 | Advanced PVST+ configuration
3.10.4 | Implementing MST
3.10.5 | Configuring Fast EtherChannel
3.10.6 | Per-VLAN spanning tree load balancing
3.10.7 | Port level tuning to control STP behavior

Module Summary |
Module Quiz |

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