Contents
xv
Catalyst 3560 Switch Software Configuration Guide
78-16156-01
CHAPTER
16 Configuring MSTP 16-1
Understanding MSTP 16-2
Multiple Spanning-Tree Regions 16-2
IST, CIST, and CST 16-3
Operations Within an MST Region 16-3
Operations Between MST Regions 16-4
Hop Count 16-5
Boundary Ports 16-5
Interoperability with 802.1D STP 16-5
Understanding RSTP 16-6
Port Roles and the Active Topology 16-6
Rapid Convergence 16-7
Synchronization of Port Roles 16-8
Bridge Protocol Data Unit Format and Processing 16-9
Processing Superior BPDU Information 16-10
Processing Inferior BPDU Information 16-10
Topology Changes 16-10
Configuring MSTP Features 16-11
Default MSTP Configuration 16-12
MSTP Configuration Guidelines 16-12
Specifying the MST Region Configuration and Enabling MSTP 16-13
Configuring the Root Switch 16-14
Configuring a Secondary Root Switch 16-16
Configuring Port Priority 16-17
Configuring Path Cost 16-18
Configuring the Switch Priority 16-19
Configuring the Hello Time 16-19
Configuring the Forwarding-Delay Time 16-20
Configuring the Maximum-Aging Time 16-21
Configuring the Maximum-Hop Count 16-21
Specifying the Link Type to Ensure Rapid Transitions 16-22
Restarting the Protocol Migration Process 16-22
Displaying the MST Configuration and Status 16-23
CHAPTER
17 Configuring Optional Spanning-Tree Features 17-1
Understanding Optional Spanning-Tree Features 17-1
Understanding Port Fast 17-2
Understanding BPDU Guard 17-3
Understanding BPDU Filtering 17-3