17.8. Examples of Common Scenarios
17.8.1. Bridged Mode
- Deploying guest virtual machines in an existing network alongside host physical machines making the difference between virtual and physical machines transparent to the end user.
- Deploying guest virtual machines without making any changes to existing physical network configuration settings.
- Deploying guest virtual machines which must be easily accessible to an existing physical network. Placing guest virtual machines on a physical network where they must access services within an existing broadcast domain, such as DHCP.
- Connecting guest virtual machines to an exsting network where VLANs are used.
17.8.2. Routed Mode
Consider a network where one or more nodes are placed in a controlled sub-network for security reasons. The deployment of a special sub-network such as this is a common practice, and the sub-network is known as a DMZ. See the following diagram for more details on this layout:
Figure 17.8. Sample DMZ configuration
Consider a virtual server hosting company that has several host physical machines, each with two physical network connections. One interface is used for management and accounting, the other is for the virtual machines to connect through. Each guest has its own public IP address, but the host physical machines use private IP address as management of the guests can only be performed by internal administrators. See the following diagram to understand this scenario:
Figure 17.9. Virtual server hosting sample configuration