Hosts and Networks Worksheet

Management Domain Networks

This section covers the VLANs, gateways, MTU, and expected IP ranges and subnet mask for each network you have configured on the Top of Rack switches in your environment.


Network Type	VLAN	Portgroup Name	CIDR Notation	Gateway	MTU
Management Network	Enter the VLAN ID. The VLAN ID can be between 0 and 4094. Note: Enter 0 for the management VLAN if you imaged the servers with VIA. VLAN 0 means the management network is untagged. Note: The VLAN ID for Uplink 1 and Uplink 2 Networks must be unique and not used by any other network type.	Enter a portgroup name.	Enter the CIDR notation for the network.	Enter the gateway IP for network.	Enter MTU for management network. The MTU can be between 1500 and 9000.
vMotion Network
vSAN Network

Virtual Networking

The deployment parameter workbook provides three vSphere Distributed Switch profiles that allow you to perform bring-up of hosts with two or four pNICs and to create up to two vSphere Distributed Switches for isolating VMkernel traffic. The information that you are required to provide depends on the profile that you select.

Note: You can use the VMware Cloud Foundation API to perform bring-up with other combinations of vSphere Distributed Switches and pNICs that are not available using the vSphere Distributed Switch profiles.

vSphere Distributed Switch Profile	Description
Profile 1	One vSphere Distributed Switch (vDS): Traffic for Management, vMotion, vSAN, and Host Overlay networks using specified pNICs. Two or four physical NICs (pNICs)
Profile 2	Two vSphere Distributed Switches (vDS) Four physical NICs (pNICs) Primary vDS: Traffic for Management, vMotion, and Host Overlay networks using specified pNICs. Secondary vDS: Traffic for vSAN network using specified pNICs.
Profile 3	Two vSphere Distributed Switches (vDS) Four physical NICs (pNICs) Primary vDS: Traffic for Management, vMotion, and vSAN networks using specified pNICs. Secondary vDS: Traffic for Host Overlay network using specified pNICs.

After you select a vSphere Distributed Switch Profile, enter the required information for that profile.

vSphere Standard Switch Name	Enter a name for the vSphere Standard Switch.
Primary vSphere Distributed Switch - Name	Enter a name for the primary vSphere Distributed Switch (vDS). You can modify the portgroup names of the management domain networks to make it clear which vDS each network uses.
Primary vSphere Distributed Switch - pNICs	Select the physical NICs to assign to the primary vDS.
Primary vSphere Distributed Switch - MTU Size	Enter the MTU size for the primary vDS. Default value is 9000.
Secondary vSphere Distributed Switch - Name	Enter a name for the secondary vSphere Distributed Switch (vDS). You can modify the portgroup names of the management domain networks to make it clear which vDS each network uses. Note: If you are not creating a secondary vDS, enter `n/a`.
Secondary vSphere Distributed Switch - pNICs	Select the physical NICs to assign to the secondary vDS.
Secondary vSphere Distributed Switch - MTU Size	Enter the MTU size for the secondary vDS. Default value is 9000.

Management Domain ESXi Hosts

Specify the IP addresses of the ESXi hosts for the management domain. In a standard deployment, only four hosts are required in the management domain. VMware Cloud Foundation can also be deployed with a consolidated architecture. In a consolidated deployment, all workloads are deployed in the management domain instead of to separate workload domains. As such, additional hosts may be required to provide the capacity needed. In this section, only enter values for the number of hosts desired in the management domain.


Host Name	IP Address
Enter host names for each of the four ESXi hosts.	Enter IP Address for each of the four ESXi hosts.

Inclusion Ranges

Specify IP inclusion ranges for the vSAN and vMotion networks of the management domain. IP addresses from the specified range are automatically assigned to hosts. Ensure that the IP ranges include sufficient IP addresses for the initial deployment. The number of IP addresses must be at least equal to the number of hosts deployed as part of VMware Cloud Foundation.

As an example, if you specify the range start value as 192.168.1.1 and end as 192.168.1.20, a total of 20 IP addresses would be used.

Do not use special IP addresses, such as the network or broadcast address.

IPs for the vMotion range must be part of the VLAN configured with the vMotion portgroup. IPs for the vSAN range must be part of the VLAN configured for the vSAN portgroup. All IPs within the range must be available for use or IP conflicts will occur. It is a good practice to validate this prior to starting a deployment.

Table 1. Input Required
Network	Start IP	End IP
vMotion	Enter start of IP address range for vMotion network.	Enter end of IP address range.
VSAN	Enter start of IP address range for vMotion network.	Enter end of IP address range.

ESXi Host Security Thumbprints

If you want bring-up to validate the SSH fingerprint and SSL thumbprints of the ESXi hosts before connecting to them to reduce the chance of Man In The Middle (MiTM) attack, select Yes in the Validate Thumbprints field.

If you set Validate Thumbprints to Yes, follow the steps below.

In a web browser, log in to the ESXi host using the VMware Host Client.
In the navigation pane, click Manage and click the Services tab.
Select the TSM-SSH service and click Start if not started.
Connect to the VMware Cloud Builder appliance using an SSH client such as Putty.
Enter the admin credentials you provided when you deployed the VMware Cloud Builder appliance.
Retrieve the SSH fingerprint by entering the following command replacing hostname with the FQDN of your host:
```
ssh-keygen -lf <(ssh-keyscan hostname 2>/dev/null)
```

Retrieve the SSL thumbprint by entering the following command replacing hostname with the FQDN of your host:

openssl s_client -connect hostname:443 < /dev/null 2> /dev/null | openssl x509 -sha256 -fingerprint -noout -in /dev/stdin

In the VMware Host Client, select the TSM-SSH service for the ESXi host and click Stop.
Repeat for each ESXi host and then enter the information in the deployment parameter workbook.

NSX-T Host Overlay Network

By default, VMware Cloud Foundation uses DHCP for the management domain Host Overlay Network TEPs. For this option, a DHCP server must be configured on the NSX-T host overlay (Host TEP) VLAN of the management domain. When NSX creates TEPs for the VI workload domain, they are assigned IP addresses from the DHCP server.

Caution: For L3 aware or stretch clusters, DHCP is required for Host Overlay Network TEP IP assignment.

For the management domain and VI workload domains with uniform L2 clusters, you can choose to use static IP addresses instead. Make sure the IP range includes enough IP addresses for the number of hosts that will use the static IP Pool. The number of IP addresses required depends on the number of pNICs on the ESXi hosts that are used for the vSphere Distributed Switch that handles host overlay networking. For example, a host with four pNICs that uses two pNICs for host overlay traffic requires two IP addresses in the static IP pool..

Caution: If you use static IP addresses for the management domain Host Overlay Network TEPs, you cannot stretch clusters in the management domain or any VI workload domains.

Table 2. DHCP Settings
Parameter	Value
VLAN ID	Enter a VLAN ID for the NSX-T host overlay network. The VLAN ID can be between 0 and 4094.
Configure NSX-T Host Overlay Using a Static IP Pool	Select No to use DHCP.

Table 3. Static IP Pool Settings
Parameter	Value
VLAN ID	Enter a VLAN ID for the NSX-T host overlay network. The VLAN ID can be between 0 and 4094.
Configure NSX-T Host Overlay Using a Static IP Pool	Select Yes to use a static IP pool.
Pool Description	Enter a description for the static IP pool.
Pool Name	Enter a name for the static IP pool.
CIDR Notation	Enter CIDR notation for the NSX-T Host Overlay network.
Gateway	Enter the gateway IP address for the NSX-T Host Overlay network.
NSX-T Host Overlay Start IP	Enter the first IP address to include in the static IP pool.
NSX-T Host Overlay End IP	Enter the last IP address to include in the static IP pool.