A network administrator uses the spanning-tree portfast bpduguard default global configuration command to enable BPDU guard on switch. However, BPDU guard is not activated on all access ports. What is the couse of the issue?
- BPDU guard needs to be activated on the interface configuration command mode.
- PortFast is not configured on all access ports.
- Access ports configured with root guard cannot be configured with BPDU GURAD.
- Access ports belong to different VLANs.
Explanation: BPDU guard can be enabled globally on all PortFast-enabled ports by using the spanning-tree portfast bpduguard default global configuration command. If PortFast is not configured, then BPDU guard is not activated.