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Catalyst 2950 Desktop Switch Software Configuration Guide
78-14982-01
Spanning Tree and Redundant Connectivity 11-8
Accelerated Aging to Retain Connectivity 11-9
Configuring Spanning-Tree Features 11-9
Default STP Configuration 11-10
STP Configuration Guidelines 11-10
Disabling STP 11-12
Configuring the Root Switch 11-12
Configuring a Secondary Root Switch 11-14
Configuring the Port Priority 11-15
Configuring the Path Cost 11-16
Configuring the Switch Priority of a VLAN 11-18
Configuring the Hello Time 11-19
Configuring the Forwarding-Delay Time for a VLAN 11-19
Configuring the Maximum-Aging Time for a VLAN 11-20
Configuring STP for Use in a Cascaded Stack 11-20
Displaying the Spanning-Tree Status 11-21
CHAPTER
12 Configuring RSTP and MSTP 12-1
Understanding RSTP 12-2
Port Roles and the Active Topology 12-2
Rapid Convergence 12-3
Synchronization of Port Roles 12-4
Bridge Protocol Data Unit Format and Processing 12-5
Processing Superior BPDU Information 12-6
Processing Inferior BPDU Information 12-6
Topology Changes 12-6
Understanding MSTP 12-7
Multiple Spanning-Tree Regions 12-7
IST, CIST, and CST 12-8
Operations Within an MST Region 12-8
Operations Between MST Regions 12-9
Hop Count 12-10
Boundary Ports 12-10
Interoperability with 802.1D STP 12-11
Configuring RSTP and MSTP Features 12-11
Default RSTP and MSTP Configuration 12-12
RSTP and MSTP Configuration Guidelines 12-12
Specifying the MST Region Configuration and Enabling MSTP 12-13
Configuring the Root Switch 12-14