Free D-VXR-DY-01 sample questions

Correct answer: Use two 25GbE SFP28 ports on each node, with each port cabled to a separate physical switch, and configured as an active/active VDS uplink.

vSAN ESA requires a minimum of 10GbE networking, but 25GbE is strongly recommended for optimal performance. The best practice for redundancy and performance is to use two 25GbE ports connected to separate physical switches in an active/active configuration on the vSphere Distributed Switch (VDS). This avoids a single point of failure at the switch level and utilizes all available bandwidth. LACP provides link redundancy but not switch redundancy. Using 10GbE is suboptimal for ESA, and separating traffic across different active/standby pairs is less efficient than an active/active model.

Correct answers: An intermediate firewall is blocking TCP port 902 between the vCenter Server and the ESXi hosts.; Reverse DNS (PTR) records for the ESXi hosts have not been created on the DNS server.

TCP port 902 is required for the vCenter Server to communicate with the hostd agent on ESXi hosts for management purposes. If this port is blocked, vCenter cannot add or manage the host, even if ICMP (ping) is allowed.

While not always a hard failure point, missing reverse DNS records are a very common cause of host-to-vCenter communication issues. vCenter often relies on proper forward and reverse name resolution to establish a trusted connection with hosts.

Correct answer: Use the 'Add Host Networking' wizard within VxRail Manager to re-apply the network configuration to the non-compliant node.

VxRail Manager is responsible for maintaining the cluster's configuration consistency. Manually changing configurations in vCenter can lead to configuration drift. The correct, VxRail-aware method is to use the built-in VxRail Manager functionality, such as the 'Add Host Networking' or similar Day 2 configuration wizards, to re-apply the intended network profile to the non-compliant host. This ensures the change is tracked by VxRail and aligned with its desired state.

Correct answer: 1. GET `/v1/hosts?unconfigured=true` to find the new node. 2. POST to `/v1/cluster/expansion/spec` with the new node's details. 3. POST to `/v1/cluster/expansion` to start the process.

The correct sequence involves first discovering available, unconfigured nodes. The `GET /v1/hosts?unconfigured=true` endpoint is designed for this. Next, a specification for the expansion must be created using a POST to an endpoint like `/v1/cluster/expansion/spec` or by providing the full spec in the final call. Finally, the expansion is initiated with a POST to the primary `/v1/cluster/expansion` endpoint, including the specification of the node to be added. The other options either miss steps or have them in the wrong order.

Correct answer: False

While using the VxRail Configuration Portal and generating a JSON file is a best practice for complex or repeatable deployments, it is not mandatory. An engineer can perform the initial cluster configuration interactively through the VxRail Manager UI wizard without pre-creating a JSON file.

Correct answer: Use a KVM crash cart to access the System Setup (BIOS) on each node and assign a static IP address to the iDRAC.

Without DHCP, the iDRACs will not get an IP address automatically. The standard procedure for initial configuration in this scenario is to connect a KVM (Keyboard, Video, Mouse) crash cart to each node, boot into the System Setup (BIOS) or Lifecycle Controller, and manually assign a static IP address, subnet mask, and gateway to the iDRAC port. Once it has an IP, it can be accessed over the network for further configuration.

Correct answer: On all components in the end-to-end network path for vSAN traffic, including the host vmkernel adapters, the VDS, and all physical switch ports.

For Jumbo Frames to work correctly, the MTU size must be consistent across the entire Layer 2 network path. This includes the source (vSAN vmkernel adapter on each host), the virtual switch (the VDS), and all physical switch ports and inter-switch links that carry the vSAN VLAN. Any mismatch along this path will result in dropped packets and severe performance degradation.

Correct answer: Change the default passwords for the vCenter administrator and VxRail Manager root accounts.

The single most critical first step in securing a new appliance is to change all default administrative passwords. The VxRail deployment process uses well-known default credentials for initial setup. Leaving these unchanged represents a significant security vulnerability. While other tasks like enabling encryption and configuring AD are important, they should only be done after the primary administrative accounts have been secured.

Correct answer: There is not enough free space in the vSAN datastore to place a host into maintenance mode with 'Ensure Accessibility'.

The VxRail upgrade process is a rolling upgrade, meaning it updates one host at a time. To update a host, it must be placed into maintenance mode. The 'Ensure Accessibility' option evacuates all vSAN data from that host to other hosts in the cluster to maintain data availability. This pre-check fails because the remaining hosts do not have enough free capacity to absorb the data from the host being upgraded, which would violate the storage policy's FTT setting.

Correct answer: From the VxRail Manager UI, generate a new log bundle and ensure the options to include vCenter and host logs are selected.

The VxRail Manager provides a centralized and orchestrated method for log collection. Its log bundle generation tool is designed to collect not only its own logs but also to reach out and gather logs from the managed vCenter Server, all ESXi hosts in the cluster, and hardware-level logs via iDRAC. This creates a single, comprehensive package that is time-synchronized, which is exactly what Dell Support requires for effective troubleshooting.