In the HRP and MSTP two methods: direct connection detection and proxy detection. When the stack system is in the proxy detection mode, how often will the stack member switch that is running…

Question

Options

• A10 seconds
• B15 seconds
• C2 seconds
• D30 seconds

• A
  4% (1)
• B
  11% (3)
• C
  81% (22)
• D
  4% (1)

Explanation

In Huawei stack systems using proxy (relay) detection mode, MAD messages are sent every 2 seconds, making option C correct. This rapid interval ensures that a multi-active conflict - where two or more switches mistakenly act as master after a stack link failure - is detected and resolved quickly before significant network disruption occurs.

Options A (10 seconds), B (15 seconds), and D (30 seconds) are all too slow for this detection mechanism. A longer interval would leave a multi-active split undetected for an unacceptably long time, potentially causing network loops or inconsistent forwarding behavior. Huawei's implementation uses the 2-second interval specifically to balance detection speed against unnecessary control-plane overhead.

Memory tip: Associate "proxy MAD = 2 seconds" by thinking that proxy detection must act fast to compensate for the indirect path - it cannot afford to wait, so it polls at the shortest common interval used in Huawei stack detection timers.

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