Reference Guide

Additional networks
8 Dell Technologies—VMware Cloud Foundation 4-node JumpStart Solutions Guide
1.3.1 Management network
The management network is the network used to access different components of VM Cloud Foundation and it
is the network on which the VM Cloud Foundation hosts are managed. This network does not require an MTU
size larger than the minimum MTU but there is no issue if the network has an MTU larger than the Ethernet
standard.
1.3.2 vSAN network
By default, VM Cloud Foundation uses vSAN storage. A vSAN will be created when VM Cloud Foundation is
deployed. This network is used to share storage across the Cloud Foundation cluster. This network must:
• Support at least 10 Gbps data.
• Have jumbo MTU size (actual size based on other switches in the environment) is highly recommended.
1.3.3 vMotion network
vMotion is used to move VMs from one Cloud Foundation cluster host to another in case of:
• A failure
• Updating a host that may require a reboot or that may be offline for an extended period.
The vMotion network shares the same characteristics as the vSAN network.
• At least 10 Gbps
• Jumbo MTU size (actual size based on other switches in the environment) is highly recommended.
1.3.4 Host Overlay network
The host Overlay network is used by NSX-T for control plane communication between the hosts of the Cloud
Foundation cluster. The Overlay networks require an absolute minimum of 1,600 (again, an MTU of 9,000 is
recommended).
1.4 Additional networks
In addition to the minimum required network types listed above, there are three additional networks required
to complete your NSX-T networking. NSX-T provides virtual network services—routing, NAT, VPN, load
balancing, and firewall.
1.4.1 Uplink networks 1 and 2 for NSX-T data traffic
The uplink networks are used by NSX-T for data traffic into and out of the cluster. It is highly recommended
that the uplink networks have an MTU of 9,000. Each of the two required NICs will use only one of the two
Uplink networks. Each of these networks will be constrained to only one uplink.
These two uplink networks will be routed connections between the router and their corresponding IP
interfaces on the Edge Nodes. To constrain the uplink traffic to only one physical link, each of the router
members will have only an IP interface for one of the two uplink networks. The first router member will have
an IP interface on VLAN 2711 (172.27.11.1/24). The second router member will have an IP interface on
VLAN 2712 (172.27.12.1/24).