Cisco IE-3000-8TC - Page 17

Contents
xvii
Cisco IE 3000 Switch Software Configuration Guide
OL-13018-03
Operations Between MST Regions 19-3
IEEE 802.1s Terminology 19-5
Hop Count 19-5
Boundary Ports 19-6
IEEE 802.1s Implementation 19-6
Port Role Naming Change 19-6
Interoperation Between Legacy and Standard Switches 19-7
Detecting Unidirectional Link Failure 19-7
Interoperability with IEEE 802.1D STP 19-8
Understanding RSTP 19-8
Port Roles and the Active Topology 19-9
Rapid Convergence 19-9
Synchronization of Port Roles 19-11
Bridge Protocol Data Unit Format and Processing 19-12
Processing Superior BPDU Information 19-12
Processing Inferior BPDU Information 19-13
Topology Changes 19-13
Configuring MSTP Features 19-13
Default MSTP Configuration 19-14
MSTP Configuration Guidelines 19-14
Specifying the MST Region Configuration and Enabling MSTP 19-15
Configuring the Root Switch 19-17
Configuring a Secondary Root Switch 19-18
Configuring Port Priority 19-19
Configuring Path Cost 19-20
Configuring the Switch Priority 19-21
Configuring the Hello Time 19-22
Configuring the Forwarding-Delay Time 19-23
Configuring the Maximum-Aging Time 19-23
Configuring the Maximum-Hop Count 19-24
Specifying the Link Type to Ensure Rapid Transitions 19-24
Designating the Neighbor Type 19-25
Restarting the Protocol Migration Process 19-25
Displaying the MST Configuration and Status 19-26
CHAPTER 20 Configuring Optional Spanning-Tree Features 20-1
Understanding Optional Spanning-Tree Features 20-1
Understanding Port Fast 20-2
Understanding BPDU Guard 20-2
Understanding BPDU Filtering 20-3