Contents
xiv
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
78-11380-10
Configuring the Switch Priority of a VLAN 14-20
Configuring Spanning-Tree Timers 14-21
Configuring the Hello Time 14-21
Configuring the Forwarding-Delay Time for a VLAN 14-22
Configuring the Maximum-Aging Time for a VLAN 14-22
Configuring Spanning Tree for Use in a Cascaded Stack 14-23
Displaying the Spanning-Tree Status 14-24
CHAPTER
15 Configuring MSTP 15-1
Understanding MSTP 15-2
Multiple Spanning-Tree Regions 15-2
IST, CIST, and CST 15-2
Operations Within an MST Region 15-3
Operations Between MST Regions 15-3
Hop Count 15-4
Boundary Ports 15-5
Interoperability with 802.1D STP 15-5
Understanding RSTP 15-6
Port Roles and the Active Topology 15-6
Rapid Convergence 15-7
Synchronization of Port Roles 15-8
Bridge Protocol Data Unit Format and Processing 15-9
Processing Superior BPDU Information 15-10
Processing Inferior BPDU Information 15-10
Topology Changes 15-10
Configuring MSTP Features 15-11
Default MSTP Configuration 15-12
MSTP Configuration Guidelines 15-12
Specifying the MST Region Configuration and Enabling MSTP 15-13
Configuring the Root Switch 15-14
Configuring a Secondary Root Switch 15-16
Configuring the Port Priority 15-17
Configuring the Path Cost 15-18
Configuring the Switch Priority 15-19
Configuring the Hello Time 15-19
Configuring the Forwarding-Delay Time 15-20
Configuring the Maximum-Aging Time 15-21
Configuring the Maximum-Hop Count 15-21
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