Cisco CCNA (200-301)Network AccessEasy
A network engineer wants to configure Rapid PVST+ on a Cisco Catalyst 3750 switch. The engineer needs to set the STP mode globally for all VLANs. Which of the following commands, executed in global configuration mode, will correctly set the STP mode to Rapid PVST+?
- Aspanning-tree mode rapid-pvst
- Bspanning-tree mode pvst+
- Cspanning-tree rapid-pvst enable
- Dspanning-tree vlan 1-4094 mode rapid-pvst
Show answer & explanationAnswer & explanation
Correct answer: A. spanning-tree mode rapid-pvst
The command 'spanning-tree mode rapid-pvst' is the correct global configuration command to enable Rapid PVST+ on a Cisco Catalyst switch. This command applies the Rapid PVST+ mode to all VLANs by default.
Why the other options are wrong
- B. This command would configure PVST+, not Rapid PVST+.
- C. This command is syntactically incorrect for enabling Rapid PVST+.
- D. This command tries to specify VLANs for a global mode command, which is not the correct syntax for setting the global mode.
Rapid PVST+ Global Configuration
Rapid PVST+ (Rapid Per-VLAN Spanning Tree Plus) is configured globally on a Cisco switch to provide faster convergence of STP states on a per-VLAN basis.
- Uses 'spanning-tree mode rapid-pvst' command.
- Applies to all VLANs by default.
- Offers faster convergence than PVST+.
Memory trick: M.O.D.E. - Mode Of Default Enablement