Specify the networking information for the VI workload domain.

For the workload domain's management network, the creation workflow uses the management network that was configured during your system's bring-up process. During deployment of the VI workload domain's infrastructure, the workflow also configures the networks used by the vMotion, vSAN, and VXLAN capabilities in the workload domain. You can choose to use the default configurations or specify new ones in the Network step of the wizard. For each subnet, you can also specify excluded IP addresses to prevent the workflow from assigning those IP addresses to the workload domain's resources.

Important: If you specify IP addresses for exclusion for a subnet in these wizard screens, they override any IP exclusions that were entered originally during your system's bring-up process for that subnet. See About Excluding IP Address from SDDC Manager Use.
Table 1. VI Workload Domain Network Configurations
Network Configuration Description
Management network

By default, the workload domain's management network configuration uses the management network that was configured during the bring-up process.

vMotion network

When you select to use the defaults, the workload domain's vMotion configuration uses the vMotion network that was configured during the bring-up process.

If you choose to use this default, but the software detects inadequate IP address space in the existing vMotion network, you must specify a new configuration at that step in the wizard.

vSAN network

When you select to use the defaults, a VLAN ID between 3000 - 4000 is assigned to the VI workload domain.

If you choose to use this default, but the software detects inadequate IP address space in the existing vSAN network, you must specify a new configuration at that step in the wizard.

VXLAN network

When you select to use the defaults, the workload domain's VXLAN configuration uses the VXLAN network that was configured during the bring-up process.

If you choose to use this default, but the software detects inadequate IP address space in the existing VXLAN network, you must specify a new configuration at that step in the wizard.

Data center network

Used for access from outside this Cloud Foundation system to the workloads that you run in the workload domain. At this wizard step, you can:

  • Select the network configuration that was configured during the bring-up process.
  • Select a network configuration that was configured in advance using the Data Center Connections settings screen.
  • Enter a new configuration. A VLAN ID is required.
Important: Do not select a data center connection that is already associated with a VDI workload domain or unexpected results might occur.

Prerequisites

Verify that you have met the networking prerequisites as described in Create a Virtual Infrastructure Workload Domain.

Important: If you enter custom network configurations for the vMotion, vSAN, and VXLAN networks instead of using the default configurations, do not duplicate any of the VLAN ID, subnet (network ID), or gateway addresses that you already entered during creation of other workload domains. For example, if you previously created a VI workload domain and used value 50.0.0.0 for its vMotion network subnet field, do not re-use that value.

Procedure

  1. Choose whether to use already-configured vMotion, vSAN, and VXLAN networks for this VI workload domain.
    • Select the USE ALL DEFAULT NETWORKS check box. After selecting the USE ALL DEFAULT NETWORKS check box, click Next to proceed to the next wizard step for specifying the Data Center connection.
      Note: When you select the USE ALL DEFAULT NETWORKS check box, you need to configure the Data Center connection only.

      Continue with Step 9 below.

    • Leave the USE ALL DEFAULT NETWORKS check box unselected and click Next to proceed.
  2. (Optional) For the management network configuration, if you want to prevent the workflow from assigning some of the subnet's IP addresses to the workload domain's resources, type those addresses or ranges.
    Other than the IP address exclusion fields, the other fields on this screen are read-only. The displayed management network settings are the ones that were specified during your system's bring-up process. Because the workload domains use the same management network, you cannot change these settings when configuring a workload domain.
    Caution: If you specify IP addresses for exclusion in this screen, they override any IP exclusions that were entered originally during the bring-up process. See About Excluding IP Address from SDDC Manager Use.
  3. Click Next to proceed to the vMotion network configuration.
  4. For the vMotion network configuration, choose one of these options.
    • To use the same vMotion network configuration that was specified during your system's bring-up process, make sure the USE DEFAULTS check box is checked and proceed to the vSAN network configuration.
    • To specify a custom vMotion network for this workload domain, clear the USE DEFAULTS check box, type the network settings, and then proceed to the vSAN network configuration.
      Note: If you choose to use the defaults, but the software detects inadequate IP address space in the existing network, you must specify a new configuration.
  5. Click Next to proceed to the vSAN network configuration.
  6. For the vSAN network configuration, choose one of these options.
    • To use the same vSAN network configuration that was specified during your system's bring-up process, check the USE DEFAULTS check box and proceed to the VXLAN network configuration.
    • To specify a custom vSAN network for this workload domain, clear the USE DEFAULTS check box if it is selected, type the vSAN network settings, and then proceed to the VXLAN network configuration.
      Note: If you choose to use the defaults, but the software detects inadequate IP address space in the existing network, you must specify a new configuration.
    Caution: If you specify IP addresses for exclusion in this screen, they override any IP exclusions that were entered originally during your system's bring-up process. See About Excluding IP Address from SDDC Manager Use.
  7. For the VXLAN network configuration, choose one of these options.
    • To use the same VXLAN network configuration that was specified during your system's bring-up process, check the USE DEFAULTS check box and proceed to the Data Center connection configuration.
    • To specify a custom VXLAN network for this workload domain, type the VXLAN network settings.
      Use the following guidelines to determine the best configuration for your workload domain.
      Number of hosts Subnet mask setting
      30 /27
      62 /26
      126 /25
      Note: If you specified a large IP subnet mask (for example, /22) for VXLAN during the bring-up phase of installation, the following recommendations apply when configuring the VXLAN network for your VI workload domain.
      • Cloud Foundation uses the NSX Unicast Replication mode by default, which may result in ESXi host overhead when a high number of ESXi hosts belong to a single subnet.
      • VXLAN ESXi host overhead also depends on the amount of multi-destination broadcast, unknown unicast, and multicast (BUM) traffic.
      • To avoid high ESXi host overhead, it is recommended that you use a dedicated IP subnet/VLAN for VXLAN for each VI/VDI workload domain.
      For more information about the NSX Unicast Replication mode, see Understanding Replication Modes in the NSX product documentation.
  8. Proceed to the Data Center network configuration.
  9. (Optional) For the Data Center connection, choose one of these options.
    • Select one of the configurations that is already in place. During ongoing operations, Data Center configurations are established using the Settings > Network Settings > Data Center screen.
    • Select Public to use the data center network provided during bring-up.
    • Use the drop-down Custom Configuration choice to create a new configuration to be used for this workload domain. A VLAN ID is required.
    Explicitly specifying a data center connection at this step is optional. If you do not specify a data center connection, the workflow uses the one associated with the management domain by default.
    Important: Do not select a data center connection that is already associated with a VDI workload domain or unexpected results might occur.
  10. Proceed to the next step by clicking Next.