Specifications

Contents
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Cisco MWR 2941 Mobile Wireless Edge Router Release 3.5 Software Configuration Guide, Cisco IOS Release 15.1(3)MR
OL-26895-01
IST, CIST, and CST 10-2
Operations Within an MST Region 10-3
Operations Between MST Regions 10-3
IEEE 802.1s Terminology 10-5
Hop Count 10-5
Boundary Ports 10-6
IEEE 802.1s Implementation 10-6
Port Role Naming Change 10-6
Interoperation Between Legacy and Standard Switches 10-7
Detecting Unidirectional Link Failure 10-7
Interoperability with IEEE 802.1D STP 10-8
Understanding RSTP 10-8
Port Roles and the Active Topology 10-9
Rapid Convergence 10-9
Synchronization of Port Roles 10-11
Bridge Protocol Data Unit Format and Processing 10-11
Processing Superior BPDU Information 10-12
Processing Inferior BPDU Information 10-12
Topology Changes 10-13
Configuring MSTP Features 10-13
Default MSTP Configuration 10-14
MSTP Configuration Guidelines 10-14
Specifying the MST Region Configuration and Enabling MSTP 10-15
Configuring the Router as a Root Switch 10-16
Configuring a Secondary Root Switch 10-18
Configuring Port Priority 10-19
Configuring Path Cost 10-20
Configuring the Device Priority 10-21
Configuring the Hello Time 10-22
Configuring the Forwarding-Delay Time 10-23
Configuring the Maximum-Aging Time 10-23
Configuring the Maximum-Hop Count 10-24
Specifying the Link Type to Ensure Rapid Transitions 10-24
Designating the Neighbor Type 10-25
Restarting the Protocol Migration Process 10-25
Displaying the MST Configuration and Status 10-26
CHAPTER 11 Configuring Optional Spanning-Tree Features 11-1
Understanding Optional Spanning-Tree Features 11-1