Cisco Catalyst 2960 Series

IST, CIST, and CST 245
Operations Within an MST Region 246
Operations Between MST Regions 246
IEEE 802.1s Terminology 247
Illustration of MST Regions 248
Hop Count 248
Boundary Ports 249
IEEE 802.1s Implementation 249
Port Role Naming Change 250
Interoperation Between Legacy and Standard Switches 250
Detecting Unidirectional Link Failure 251
MSTP and Switch Stacks 251
Interoperability with IEEE 802.1D STP 252
RSTP Overview 252
Port Roles and the Active Topology 252
Rapid Convergence 253
Synchronization of Port Roles 254
Bridge Protocol Data Unit Format and Processing 255
Processing Superior BPDU Information 256
Processing Inferior BPDU Information 256
Topology Changes 256
Protocol Migration Process 257
Default MSTP Configuration 257
About MST-to-PVST+ Interoperability (PVST+ Simulation) 258
About Detecting Unidirectional Link Failure 259
How to Configure MSTP Features 261
Specifying the MST Region Configuration and Enabling MSTP 261
Configuring the Root Switch 264
Configuring a Secondary Root Switch 265
Configuring Port Priority 266
Configuring Path Cost 268
Configuring the Switch Priority 269
Configuring the Hello Time 271
Configuring the Forwarding-Delay Time 272
Configuring the Maximum-Aging Time 273
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
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Contents