C1000-163 · Question #146
What is the minimum bandwidth required between the primary and the secondary nodes of a HA cluster?
The correct answer is C. 1 Gbps. A 1 Gbps connection is the industry-standard minimum for HA cluster heartbeat and replication traffic, ensuring state synchronization, failover detection, and data mirroring happen fast enough to prevent split-brain scenarios and data loss during a node failure. A (1 Mbps) is…
Question
What is the minimum bandwidth required between the primary and the secondary nodes of a HA cluster?
Options
- A1 Mbps
- B100 Mbps
- C1 Gbps
- D10 Gbps
How the community answered
(30 responses)- A7% (2)
- B13% (4)
- C77% (23)
- D3% (1)
Explanation
A 1 Gbps connection is the industry-standard minimum for HA cluster heartbeat and replication traffic, ensuring state synchronization, failover detection, and data mirroring happen fast enough to prevent split-brain scenarios and data loss during a node failure.
- A (1 Mbps) is far too slow - even basic heartbeat traffic combined with state replication would saturate this link, causing false failover triggers or replication lag.
- B (100 Mbps) might seem plausible for small workloads, but it's below the accepted minimum standard and creates a bottleneck under real-world replication load.
- D (10 Gbps) exceeds the minimum requirement - it's used in high-throughput production environments, but the question asks for the floor, not the ideal.
Memory tip: Think "HA = 1 Gig Always" - the "G" in Gbps mirrors the "G" in the word "Gigabit," which is the go/no-go threshold for cluster reliability.
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