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2V0-621D · Question #253

An administrator has decided to create 10 ESXi 6.x hosts via Auto Deploy for a new Test/Dev cluster. The hosts are configured to obtain their networking configuration via DHCP. Which condition would e

The correct answer is A. The BIOS DHCP File Name was incorrectly entered on the DHCP server.. When deploying ESXi hosts via Auto Deploy, the DHCP server must be correctly configured with PXE boot options for all hosts to successfully acquire an IP address and begin the boot process.

Section 5 – Administer and Protect vSphere 6.x Resources

Question

An administrator has decided to create 10 ESXi 6.x hosts via Auto Deploy for a new Test/Dev cluster. The hosts are configured to obtain their networking configuration via DHCP. Which condition would explain why none of the hosts are able to receive a valid DHCP address?

Options

  • AThe BIOS DHCP File Name was incorrectly entered on the DHCP server.
  • BThe DHCP scope was set too small.
  • CThe DHCP lease duration is set too short.
  • DThe Boot Server Host Name has been set to the TFTP server.

How the community answered

(59 responses)
  • A
    81% (48)
  • B
    5% (3)
  • C
    12% (7)
  • D
    2% (1)

Why each option

When deploying ESXi hosts via Auto Deploy, the DHCP server must be correctly configured with PXE boot options for all hosts to successfully acquire an IP address and begin the boot process.

AThe BIOS DHCP File Name was incorrectly entered on the DHCP server.Correct

When using PXE boot for Auto Deploy, the DHCP server must provide the boot file name (DHCP option 67) to the client. If this name is incorrectly entered on the DHCP server, the PXE clients will not be able to retrieve the correct boot file, leading to a failure in the boot process and preventing the hosts from fully acquiring and using their DHCP-assigned network configuration for Auto Deploy.

BThe DHCP scope was set too small.

If the DHCP scope were too small, some hosts might receive addresses, and others would fail once the scope is exhausted; the question states that none of the hosts receive an address, indicating a systemic issue, not a capacity problem.

CThe DHCP lease duration is set too short.

A short DHCP lease duration only affects how often hosts renew their leases; it does not prevent them from initially obtaining a DHCP address.

DThe Boot Server Host Name has been set to the TFTP server.

The Boot Server Host Name (DHCP option 66) should be set to the TFTP server's address; if it is set correctly, it enables the PXE client to find the TFTP server, and if it were set incorrectly, it would prevent TFTP boot but not the initial DHCP address acquisition.

Concept tested: vSphere Auto Deploy PXE boot configuration

Source: https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.esxi.install.doc/GUID-82EF7A76-88F4-448F-A292-80D5FC0D36B5.html

Topics

#Auto Deploy#PXE Boot#DHCP configuration#ESXi provisioning

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