200-150 Question #208: Real Exam Question with Answer & Explanation

The correct answer is D: to alleviate the domain ID limit by sharing the domain ID with the edge switches. NPV mode on a Cisco Nexus 5000 eliminates the need for the edge switch to claim its own FC domain ID by proxying N-Port logins through the core NPIV-enabled switch.

Question

Which reason for configuring a Cisco Nexus 5000 Series switch in NPV mode is valid?

Options

Ato increase the domain ID limit by assigning subdomain IDs to the edge switches
Bto share all the domain IDs with the core and edge switches
Cto eliminate the domain ID limit by assigning a different domain ID to the core switch
Dto alleviate the domain ID limit by sharing the domain ID with the edge switches

Explanation

NPV mode on a Cisco Nexus 5000 eliminates the need for the edge switch to claim its own FC domain ID by proxying N-Port logins through the core NPIV-enabled switch.

Common mistakes.

A. NPV mode does not introduce subdomain IDs or increase the 239-domain-ID ceiling; it avoids consuming domain IDs on edge switches entirely.
B. NPV mode does not share domain IDs across all switches in the fabric; only the core NPIV switch holds a domain ID while the NPV switch holds none.
C. NPV mode does not assign a different domain ID to the core switch; the core switch retains its own domain ID and the NPV switch simply does not register for one.

Concept tested. NPV mode domain ID conservation in FC fabrics

Reference. https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/san_switching/Cisco_Nexus_5000_Series_NX-OS_SAN_Switching_Configuration_Guide.html

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