Contents
ix
Software Configuration Guide—Release 12.2(25)EW
OL-6696-01
STP Timers 14-4
Creating the STP Topology 14-4
STP Port States 14-5
MAC Address Allocation 14-5
STP and IEEE 802.1Q Trunks 14-6
Per-VLAN Rapid Spanning Tree 14-6
Default STP Configuration 14-6
Configuring STP 14-7
Enabling STP 14-7
Enabling the Extended System ID 14-8
Configuring the Root Bridge 14-9
Configuring a Secondary Root Switch 14-12
Configuring STP Port Priority 14-13
Configuring STP Port Cost 14-15
Configuring the Bridge Priority of a VLAN 14-16
Configuring the Hello Time 14-17
Configuring the Maximum Aging Time for a VLAN 14-18
Configuring the Forward-Delay Time for a VLAN 14-18
Disabling Spanning Tree Protocol 14-19
Enabling Per-VLAN Rapid Spanning Tree 14-20
CHAPTER
15 Configuring STP Features 15-1
Overview of Root Guard 15-2
Overview of Loop Guard 15-2
Overview of PortFast 15-3
Overview of BPDU Guard 15-4
Overview of PortFast BPDU Filtering 15-4
Overview of UplinkFast 15-5
Overview of BackboneFast 15-6
Enabling Root Guard 15-8
Enabling Loop Guard 15-9
Enabling PortFast 15-11
Enabling BPDU Guard 15-12
Enabling PortFast BPDU Filtering 15-12
Enabling UplinkFast 15-14
Enabling BackboneFast 15-15
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