Contents
ix
Cisco Systems IntelligentGigabit Ethernet Switch Modules for the IBM BladeCenter, Software Configuration Guide
24R9746
Configuring Spanning-Tree Features 9-11
Default Spanning-Tree Configuration 9-12
Spanning-Tree Configuration Guidelines 9-12
Changing the Spanning-Tree Mode 9-13
Disabling Spanning Tree 9-14
Configuring the Root Switch 9-15
Configuring a Secondary Root Switch 9-17
Configuring the Port Priority 9-17
Configuring the Path Cost 9-19
Configuring the Switch Priority of a VLAN 9-20
Configuring Spanning-Tree Timers 9-21
Configuring the Hello Time 9-21
Configuring the Forwarding-Delay Time for a VLAN 9-22
Configuring the Maximum-Aging Time for a VLAN 9-22
Displaying the Spanning-Tree Status 9-23
CHAPTER
10 Configuring MSTP 10-1
Understanding MSTP 10-2
Multiple Spanning-Tree Regions 10-2
IST, CIST, and CST 10-2
Operations Within an MST Region 10-3
Hop Count 10-4
Interoperability with IEEE 802.1D STP 10-4
Understanding RSTP 10-5
Port Roles and the Active Topology 10-5
Rapid Convergence 10-6
Synchronization of Port Roles 10-7
Bridge Protocol Data Unit Format and Processing 10-8
Processing Superior BPDU Information 10-9
Processing Inferior BPDU Information 10-9
Topology Changes 10-9
Configuring MSTP Features 10-10
Default MSTP Configuration 10-11
MSTP Configuration Guidelines 10-11
Specifying the MST Region Configuration and Enabling MSTP 10-12
Configuring the Root Switch 10-13
Configuring a Secondary Root Switch 10-15
Configuring the Port Priority 10-15
Configuring the Path Cost 10-17