NS0-157 Question #397: Real Exam Question with Answer & Explanation

The correct answer is D: A single HA pair stretched across sites using extended cables.. A stretch MetroCluster in clustered ONTAP is a single HA pair whose two nodes are located at separate sites and connected directly using extended long-distance cables.

Question

Which statement describes a MetroCluster environment in clustered Data ONTAP?

Options

AA single cluster at each site interconnected using FC switches and Ethernet switches.
BA single cluster at each site interconnected using FC switches only.
CA single HA pair cabled across sites using FC switches.
DA single HA pair stretched across sites using extended cables.

Explanation

A stretch MetroCluster in clustered ONTAP is a single HA pair whose two nodes are located at separate sites and connected directly using extended long-distance cables.

Common mistakes.

A. Separate clusters at each site interconnected by FC and Ethernet switches describes a fabric MetroCluster variant, not the stretch single-HA-pair topology.
B. FC switches only between sites describes fabric MetroCluster, and the mention of a separate cluster at each site is incorrect for either MetroCluster variant.
C. While a single HA pair cabled across sites is partially accurate, stretch MetroCluster uses direct extended cables, not FC switches, making this description incorrect.

Concept tested. MetroCluster stretch topology vs fabric topology

Reference. https://docs.netapp.com/us-en/ontap-metrocluster/install-stretch/concept_stretch_mcc_configuration.html

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