Specifications

Contents
xiii
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
78-11380-07
Configuring the Forwarding-Delay Time 13-20
Configuring the Maximum-Aging Time 13-21
Configuring the Maximum-Hop Count 13-21
Specifying the Link Type to Ensure Rapid Transitions 13-22
Restarting the Protocol Migration Process 13-22
Displaying the MST Configuration and Status 13-23
CHAPTER 14 Configuring Optional Spanning-Tree Features 14-1
Understanding Optional Spanning-Tree Features 14-1
Understanding Port Fast 14-2
Understanding BPDU Guard 14-3
Understanding BPDU Filtering 14-3
Understanding UplinkFast 14-4
Understanding Cross-Stack UplinkFast 14-5
How CSUF Works 14-6
Events that Cause Fast Convergence 14-7
Limitations 14-8
Connecting the Stack Ports 14-8
Understanding BackboneFast 14-10
Understanding EtherChannel Guard 14-12
Understanding Root Guard 14-12
Understanding Loop Guard 14-13
Configuring Optional Spanning-Tree Features 14-14
Default Optional Spanning-Tree Configuration 14-14
Enabling Port Fast 14-14
Enabling BPDU Guard 14-15
Enabling BPDU Filtering 14-16
Enabling UplinkFast for Use with Redundant Links 14-17
Enabling Cross-Stack UplinkFast 14-18
Enabling BackboneFast 14-19
Enabling EtherChannel Guard 14-19
Enabling Root Guard 14-20
Enabling Loop Guard 14-20
Displaying the Spanning-Tree Status 14-21
CHAPTER 15 Configuring VLANs 15-1
Understanding VLANs 15-1
Supported VLANs 15-2
VLAN Port Membership Modes 15-3