Practice Test Geeks(STP) Spanning Tree Protocol Practice Test
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Troubleshooting STP Flashcards

6 cards from real STP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. How do you configure STP priority for load balancing across VLANs?

    Answer: Set different root bridges for different VLANs using per-VLAN priority values

    By making different switches the root bridge for different VLANs, traffic can be distributed across redundant links.

  2. What is the TCN BPDU?

    Answer: Topology Change Notification sent by a switch when it detects a port state change

    TCN BPDUs notify the root bridge of topology changes so the network can update its forwarding tables.

  3. How does STP interact with EtherChannel?

    Answer: STP treats an EtherChannel as a single logical link, preventing it from blocking individual member ports

    EtherChannel bundles physical links into one logical link, so STP sees a single high-bandwidth connection rather than redundant links.

  4. What is the recommended STP configuration for access layer ports?

    Answer: Enable PortFast and BPDU guard on all access ports connected to end devices

    PortFast provides immediate connectivity while BPDU guard protects against unauthorized switches being connected.

  5. What debugging tools are available for STP issues?

    Answer: debug spanning-tree events, show spanning-tree detail, show spanning-tree interface

    Multiple show and debug commands provide visibility into STP operations, state changes, and BPDU processing.

  6. What is the best practice for STP timer configuration?

    Answer: Use default timers unless there is a specific justified reason to change them

    Default STP timers are carefully calculated based on worst-case scenarios and should generally not be modified.