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Dell VxRail Architecture Overview


Satellite nodes

VxRail satellite nodes are single nodes that deploy in edge environments. Satellite nodes are managed through a centralized primary cluster running VxRail 7.0.320 or later.

Satellite nodes include VxRail HCI system software that is similar to a VxRail 2-node cluster with VMware vSAN or a traditional multinode VxRail cluster. Satellite nodes provide consistent VxRail operational experience across the edge and core. Satellite nodes are single nodes with no shared storage and do not include VMware vSAN licenses.

The minimum cluster size required to manage satellite nodes is three nodes for VxRail 7.0.320 and later. Satellite nodes are managed from an existing VxRail cluster with VMware vSAN that can manage up to 500 satellite nodes.

With VxRail 7.0.450 and later, satellite nodes can be managed by a standard cluster and a 2-node cluster. The addition of satellite nodes may impact performance. The maximum number of satellite nodes with a 2-node cluster is 20.

Verify that VxRail satellite nodes that are remotely deployed have TCP/IP connectivity to a VxRail Manager instance on a previously deployed VxRail cluster. This connectivity is required to enable the LCM of the node, centralized monitoring, and management. Each satellite node must have an IP address assigned and be able to connect over the VxRail external management network to VxRail Manager. VxRail Manager communicates with the node using the assigned IP address. VxRail Manager does not run a discovery process for satellite nodes.

During initial power-on, the satellite node is not configured until a VxRail Manager instance connection is established. VxRail Manager configures the node with a standard switch or a VMware VDS. Plan your data center network to allow the VxRail external management network to route externally. Work with your network administrator or service provider to support this network to route to each planned VxRail satellite node.

VxRail Manager performs LCM of the satellite nodes, including updating the firmware, BIOS, and the VMware ESXi operating system. The VxRail bundles that get pushed to the satellite node are smaller than a standard VxRail upgrade bundle.

Figure 1. VMware vSAN cluster managing VxRail satellite nodes
VMware vSAN cluster managing VxRail satellite nodes

Before you use satellite nodes, deploy a compatible VxRail cluster with local VMware vSAN storage to support the management and monitoring of satellite nodes. Verify that your workload requirements at remote locations do not exceed the resource capacity of a satellite node. VxRail satellite nodes are limited to a single instance and cannot be reconfigured to join a cluster.

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