Contents
ix
Software Configuration Guide—Release 12.2(25)SG
OL-7659-03
Configuring Ethernet Interfaces for Layer 2 Switching 11-5
Configuring an Ethernet Interface as a Layer 2 Trunk 11-6
Configuring an Interface as a Layer 2 Access Port 11-8
Clearing Layer 2 Configuration 11-9
CHAPTER
12 Configuring SmartPort Macros 12-1
Understanding SmartPort Macros 12-1
Configuring Smart-Port Macros 12-2
Default SmartPort Macro Configuration 12-2
SmartPort Macro Configuration Guidelines 12-4
Creating and Applying SmartPort Macros 12-4
Displaying SmartPort Macros 12-8
CHAPTER
13 Understanding and ConfiguringSTP 13-1
Overview of STP 13-1
Understanding the Bridge ID 13-2
Bridge Protocol Data Units 13-3
Election of the Root Bridge 13-4
STP Timers 13-4
Creating the STP Topology 13-4
STP Port States 13-5
MAC Address Allocation 13-5
STP and IEEE 802.1Q Trunks 13-6
Per-VLAN Rapid Spanning Tree 13-6
Default STP Configuration 13-6
Configuring STP 13-7
Enabling STP 13-7
Enabling the Extended System ID 13-8
Configuring the Root Bridge 13-9
Configuring a Secondary Root Switch 13-12
Configuring STP Port Priority 13-13
Configuring STP Port Cost 13-15
Configuring the Bridge Priority of a VLAN 13-16
Configuring the Hello Time 13-17
Configuring the Maximum Aging Time for a VLAN 13-18
Configuring the Forward-Delay Time for a VLAN 13-18
Disabling Spanning Tree Protocol 13-19
Enabling Per-VLAN Rapid Spanning Tree 13-20