What are the correct CLI commands to configure the management IP Address on either the MX9116n or the MX5108n switches running SmartFabric OS10?

Question

Options

• Ainterface vlan 4020
• Binterface mgmt 1/1/1
• Cinterface vlan 4020
• Dinterface vlan 4020

• A
  4% (2)
• B
  2% (1)
• C
  91% (42)
• D
  2% (1)

Explanation

Note: This question appears to have a formatting issue - choices A, C, and D are all listed identically as interface vlan 4020. The actual exam likely distinguishes between them (e.g., different VLAN numbers or additional sub-commands). That said, here is the explanation based on the stated correct answer:

On MX-series switches running SmartFabric OS10, the management IP address is configured on the in-band management VLAN interface (VLAN 4020 by default), which is why interface vlan 4020 is the correct entry point - you then assign the IP under that interface context. This is a SmartFabric-specific design: management traffic flows through the fabric's reserved VLAN rather than a dedicated out-of-band port.

Option B (interface mgmt 1/1/1) is wrong because that command targets the dedicated out-of-band (OOB) management port, which is used in standard OS10 deployments - not in SmartFabric mode, where in-band VLAN 4020 takes that role.

Memory tip: Think "SmartFabric = in-band management." The fabric is smart enough to carry management traffic over VLAN 4020 - so always go to the VLAN interface, not the physical mgmt port, when in SmartFabric OS10.

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