By Victor Moreno, Kumar Reddy
Share community assets and decrease bills whereas offering safe community companies to various consumer groups
- Presents the company drivers for community virtualization and the most important demanding situations dealing with community designers today
- Shows tips on how to use virtualization designs with present purposes, resembling VoIP and community providers, similar to caliber of carrier and multicast
- Provides layout possible choices for various real-world deployment situations, with configuration examples and case studies
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Extra info for Network Virtualization
This is the case for segments providing guest access to the Internet, in which many guests access a single resource in the network. This is manageable because the policies are identical everywhere in the network (allow Internet access, deny all internal access). The policies are usually applied at the edge of the Layer 3 domain. Figure 3-4 shows ACL policies applied at the distribution layer to segment a campus network. Part I: A Network Architecture for the Virtual Enterprise 45 46 Part I: A Network Architecture for the Virtual Enterprise Figure 3-4.
What are the primitives used for Layer 2, Layer 3, or Layer 4 traffic? • Data path How is traffic separation enforced across a network path? What tools are available to maintain the separation across a network? • Control plane Because data-path virtualization essentially builds an overlay topology, what changes are needed for routing protocols to function correctly? This chapter does not cover architectures, topologies, or designs. The purpose of this chapter is to make sure you understand the technology before using it.
Whether to use it or not depends on the need to keep common services or transit traffic in the fusion area protected from the Internet. As mentioned, the common services could exist in a central location or in their own VN and therefore distributed throughout the enterprise. Depending on where the common services are located, the VN perimeter topology will vary. Figure 3-9 illustrates the different scenarios for common services positioning and the Internet firewall. Part I: A Network Architecture for the Virtual Enterprise 51 52 Part I: A Network Architecture for the Virtual Enterprise Figure 3-9.