4.4.4 Design Implications
This service provider
has been providing managed compute and networking services for years developing an established process for datacenter automation. The advantage for the service provider is that the
established process and automation technology can be used as a foundation.Although e
xternal networks can be shared between multiple o
rganizations and o
rganization virtual datacenter
n
etworks, service provider
s are
more likely to dedicate an external network for each customer.
By leveraging the existing investments and established process associated with datacenter automation, the service provider is automating what vCloud Director would typically handle at the networking layer. vCloud Director uses network pools to provide Layer 2 isolation of a tenant’s virtual machines from the vApp through the physical network using VLANs, vCloud Director network isolation (VCDNI), or VXLAN.