A network engineer connects two Cisco Catalyst switches using a point-to-point GigabitEthernet link running Rapid PVST+. Place the steps of the Rapid PVST+ Proposal and Agreement handshaking process in the correct chronological order from first to last.
- 1The upstream switch sends a BPDU with the Proposal bit set out of its designated port toward the downstream switch.
- 2The downstream switch receives the proposal and initiates synchronization by placing all non-edge designated ports into the Discarding state.
- 3The downstream switch transmits a BPDU with the Agreement bit set back to the upstream switch.
- 4The upstream switch receives the agreement and immediately transitions its designated port to the Forwarding state.
Cevap
The correct chronological sequence for the Rapid PVST+ Proposal-Agreement handshake is: 1) Upstream switch sends a Proposal BPDU, 2) Downstream switch puts non-edge designated ports into Discarding state (sync), 3) Downstream switch sends an Agreement BPDU, 4) Upstream switch immediately transitions its designated port to Forwarding.
Rapid PVST+ achieves rapid convergence on full-duplex point-to-point links via an explicit handshake. First, an upstream switch sends a Proposal BPDU. Second, the receiving downstream switch performs synchronization by forcing all non-edge designated ports into the Discarding state. Third, the downstream switch returns an Agreement BPDU. Finally, the upstream switch receives the Agreement and immediately transitions its designated port to Forwarding.
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Anahtar Kavram
Rapid PVST+ (802.1w) Proposal-Agreement Synchronization Process
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