While designing a Layer 2 distribution switch, customer inquiries about the ability to tune Spanning Tree Protocol timers. What is a valid timer for RSTP?

The correct answer is D. hello. The Hello timer is a valid and primary RSTP timer, controlling how frequently BPDUs (Bridge Protocol Data Units) are sent - defaulting to 2 seconds. In RSTP, the hello timer is the most operationally significant tunable timer because RSTP relies on continuous BPDU exchange to…

Advanced Enterprise Campus Networks

Question

Options

Aforward delay
Bmax AGE
Cstandby
Dhello

How the community answered

(35 responses)

A
3% (1)
C
3% (1)
D
94% (33)

Explanation

The Hello timer is a valid and primary RSTP timer, controlling how frequently BPDUs (Bridge Protocol Data Units) are sent - defaulting to 2 seconds. In RSTP, the hello timer is the most operationally significant tunable timer because RSTP relies on continuous BPDU exchange to detect topology changes rapidly. 'Standby' (C) is not an STP timer at all - it belongs to HSRP. While Forward Delay (A) and Max Age (B) exist in legacy STP, RSTP largely replaces their roles with its rapid state transition mechanism (proposal/agreement), making the hello timer the primary actionable RSTP timer for tuning purposes.

Topics

#RSTP#STP timers#hello timer#spanning tree

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