Table of Contents
Question
What is a valid 2-node VxRail cluster configuration?
A. 2x 10 GbE and 2x 25 GbE in a switch configuration and external vCenter
B. 2x 1 GbE and 2x 10 GbE in a direct-connect configuration and external vCenter
C. 2x 1 GbE and 2x 10 GbE in a switch configuration and internal vCenter
D. 2x 10 GbE and 2x 25 GbE in a direct-connect configuration and internal vCenter
Answer
B. 2x 1 GbE and 2x 10 GbE in a direct-connect configuration and external vCenter
Explanation
A VxRail cluster is a group of VxRail nodes that work together to provide a highly available and scalable virtualization platform. A 2-node VxRail cluster is a special configuration that allows for a minimal deployment of VxRail nodes with reduced hardware and licensing costs. However, a 2-node VxRail cluster has some limitations and requirements that need to be considered before choosing this option.
One of the requirements for a 2-node VxRail cluster is the network configuration. A 2-node VxRail cluster can use either a switch configuration or a direct-connect configuration for the network connectivity between the nodes. A switch configuration requires a pair of external switches that support 10 GbE or higher speed and VLAN tagging. A direct-connect configuration does not require any external switches and uses a crossover cable to connect the nodes directly. However, a direct-connect configuration requires an additional pair of network ports on each node for the witness traffic.
Another requirement for a 2-node VxRail cluster is the vCenter deployment. A 2-node VxRail cluster can use either an internal vCenter or an external vCenter for the management of the cluster. An internal vCenter is deployed on one of the nodes as a virtual machine and is managed by VxRail Manager. An external vCenter is deployed outside of the cluster on a separate physical or virtual machine and is managed by the user. However, an external vCenter requires an additional license and a dedicated network connection to the cluster.
Based on these requirements, the only valid 2-node VxRail cluster configuration among the given options is B. 2x 1 GbE and 2x 10 GbE in a direct-connect configuration and external vCenter. This configuration uses the 1 GbE ports for the management and witness traffic and the 10 GbE ports for the data traffic. It also uses an external vCenter to avoid placing additional load on one of the nodes.
Reference
- 2-node cluster | Dell VxRail Network Planning Guide | Dell Technologies Info Hub
- 2-node vSAN cluster configuration | Dell VxRail System Tech Book | Dell Technologies Info Hub
- vSAN 2-Node Cluster on VxRail (delltechnologies.com)
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