A network administrator uses the spanning-tree portfast bpduguard default global configuration command to enable BPDU guard on a switch. However, BPDU guard is not activated on all access ports. What is the cause of the issue?

June 29, 2020 Last Updated: April 19, 2021 No Comments
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IT Questions Bank › Category: CCNA › A network administrator uses the spanning-tree portfast bpduguard default global configuration command to enable BPDU guard on a switch. However, BPDU guard is not activated on all access ports. What is the cause of the issue?
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A network administrator uses the spanning-tree portfast bpduguard default global configuration command to enable BPDU guard on a switch. However, BPDU guard is not activated on all access ports. What is the cause of the issue? 1ITExamAnswers Staff asked 12 months ago

Question:
A network administrator uses the spanning-tree portfast bpduguard default global configuration command to enable BPDU guard on a switch. However, BPDU guard is not activated on all access ports. What is the cause of the issue?

  • BPDU guard needs to be activated in the interface configuration command mode.
  • Access ports configured with root guard cannot be configured with BPDU guard.
  • Access ports belong to different VLANs.
  • PortFast is not configured on all access ports.

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.

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