An engineer is deploying a wireless network at a customer site. The customer requires the wireless controller to use dual-link hot standby networking. During the configuration process, the engineer…

Question

Options

• AWhen the AP selects WAC, the main WAC has not started normally
• BThe standby WAC IP address is not configured on the primary WAC or the configured IP address
• CThe IP address of protect-ac is not configured on the standby WAC
• DThe dual-link switch on the standby WAC is not turned on

• A
  79% (23)
• D
  21% (6)

Explanation

Options A, B, and C each represent a missing or failed prerequisite for establishing the dual-link hot standby relationship between the active (primary) WAC and the standby WAC. If the primary WAC hasn't started normally (A), APs cannot complete their discovery/association process, which prevents the hot standby link from initializing. If the standby WAC's IP address is missing or incorrect on the primary WAC (B), the primary has no way to reach the standby and cannot form the dual link. Similarly, if the primary WAC's IP ("protect-ac" address) is not configured on the standby WAC (C), the standby cannot identify or connect back to the primary, breaking the bidirectional relationship required for hot standby.

Option D is incorrect because in Huawei's dual-link hot standby architecture, the dual-link feature switch is enabled on the primary (active) WAC, not the standby WAC - the standby only needs the protect-ac IP configured, not its own dual-link toggle.

Memory tip: Think of it as a phone call - both parties need each other's number (B and C), the caller must be online (A), and it's the caller (primary WAC) who initiates and controls the call setup, so the standby's "dial switch" is irrelevant (eliminating D).

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