Virtual Private Cloud OnDemand Networking Guide

Figure 1‑2. Networking Components in Virtual Private Cloud OnDemand
External network (VMware controlled)
Gateway
Gateway network
(customer controlled)
Internal network
(customer controlled)
Gateways
When you create an account for the Virtual Private Cloud OnDemand service, VMware creates your first
virtual data center (named VDC1 by default) for you, and adds a default gateway and routed network to
that virtual data center. You can log in to the Virtual Private Cloud OnDemand Web UI and create more
virtual data centers; thereby adding additional gateways to your public cloud.
See Virtual Data Center Overview in the vCloud Air – Virtual Private Cloud OnDemand User's Guide for
information.
When you create an account for the Virtual Private Cloud OnDemand, you are not allocated any public IP
addresses. You can purchase public IP addresses at any time through the Virtual Private Cloud OnDemand
Web UI by using the Public IPs tab for a gateway. See “Allocation of IP Addresses,” on page 11 for
information.
By default, a gateway has the following properties:
n
Compact configuration
n
High availability disabled
n
Multi-interface mode enabled
A gateway supports 10 interfaces, but one interface is reserved for access to the external network. To
configure networking for a gateway using routed networks, use the remaining nine interfaces. You can
configure unlimited isolated networks for a gateway.
Networks
When you create a virtual data center, it contains a routed network by default. You can add additional
networks as needed. See “Add a Network to a Virtual Data Center,” on page 20 and “Add a Network to a
Gateway,” on page 22 for information.
When creating a network, you create the network as one of the following types:
n
Routed: virtual machines on this network can connect to the Internet.
To allow virtual machines on a routed network to connect to the Internet, you must also add NAT and
firewall rules for external network connectivity. See “Connect a Virtual Machine to the Internet,” on
page 39 for information.
n
Isolated: an internal network; virtual machines on an isolated network are not reachable through the
Internet.
Chapter 1 Overview of Gateways and Networks
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