In VRRP, which of the following reasons will not cause two Master devices to appear in the same backup group?

Question

Options

• AThe number of virtual IP addresses is inconsistent
• BDifferent VRRP versions
• CThe message sending interval is inconsistent
• DVRRP priorities are inconsistent

• A
  11% (8)
• B
  3% (2)
• C
  6% (4)
• D
  80% (56)

Explanation

D is correct because differing VRRP priorities are the intended election mechanism, not a misconfiguration. All routers in the group still exchange valid advertisements, see each other, and the router with the highest priority wins the election - resulting in exactly one Master. Priority differences cause a clear winner, not isolation.

Why the distractors do cause two Masters:

• A (inconsistent virtual IPs): Routers with mismatched VIP configurations fail to recognize each other's advertisements as belonging to the same group, so each declares itself Master independently.
• B (different VRRP versions): VRRPv2 and VRRPv3 are incompatible; routers can't parse each other's messages, each assumes no Master exists, and both elect themselves.
• C (inconsistent send intervals): A backup may not receive advertisements within its expected timeout window, assume the Master is dead, and promote itself - creating a split-brain scenario.

Memory tip: Think "Priority = Election, not Partition." Differing priorities produce a winner through normal protocol operation. Configuration mismatches (version, interval, VIP count) partition routers into isolated islands that can't hear each other, so each island crowns its own Master.

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