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Zorluk: OrtaRapid PVST+ Spanning Tree Protocol Operations and Roles

An enterprise network administrator is evaluating Layer 2 protocol operations after migrating the switch infrastructure to Rapid PVST+. Which two statements correctly describe Rapid PVST+ port roles and operational state behaviors?

  1. Rapid PVST+ consolidates the legacy 802.1D Disabled, Blocking, and Listening port states into a single Discarding state.Cevap
  2. An Alternate port receives BPDUs from neighboring switches and acts as a backup path to the Root Bridge.Cevap
  3. C
    Enabling PortFast on switch-to-switch trunk links accelerates convergence without risking transient Layer 2 loops.
  4. D
    The bridge priority value for a VLAN can be configured to any arbitrary integer between 0 and 65535, such as 8000.

Cevap

Rapid PVST+ consolidates the legacy Disabled, Blocking, and Listening states into a single Discarding state, and an Alternate port acts as a backup path to the Root Bridge by receiving BPDUs from other switches.
Rapid PVST+ simplifies the standard 802.1D spanning tree model by merging the Disabled, Blocking, and Listening states into a single Discarding state. Furthermore, an Alternate port receives superior BPDUs from neighbor switches, allowing it to immediately assume the Root Port role if the active Root Port loses connectivity.

Adım Adım Çözüm

1
Analyze port state changes from standard 802.1D to Rapid PVST+ (802.1w).
Identify that Rapid PVST+ simplifies port states down to Discarding, Learning, and Forwarding.
Combining Disabled, Blocking, and Listening into Discarding streamlines state evaluation.
2
Evaluate the definition and function of the Alternate port role in Rapid PVST+.
Confirm that an Alternate port offers an alternate path toward the Root Bridge when it receives BPDUs from neighboring switches.
Alternate ports provide rapid uplink failover without requiring a full re-convergence cycle.
3
Identify misconceptions regarding PortFast misconfiguration and Bridge Priority increments.
Reject the options asserting arbitrary priority integers (like 8000) and PortFast deployment on inter-switch trunks.
Bridge priorities require increments of 4096 due to the System ID Extension, and PortFast on trunks risks broadcast storms.

Anahtar Kavram

Rapid PVST+ Operational States, Port Roles, and Priority Increments
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Konular

Rapid PVST+ Spanning Tree Protocol Operations and Roles

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