By Alvaro Retana, Don Slice, Russ White
Complex IP community layout presents the suggestions community engineers and executives have to develop and stabilize huge IP networks. expertise developments and company progress necessarily bring about the need for community enlargement. This ebook offers layout suggestions and methods that permit networks to adapt into helping greater, extra complicated purposes whereas holding serious balance. complicated IP community layout provide you with a simple origin to appreciate and enforce the best community layout round the community middle, distribution and entry layers, and the typical and facet community prone. After developing a good hierarchical community layout, you are going to discover ways to observe OSPF, IS-IS, EIGRP, BGP, NHRP, and MPLS. Case reviews aid every one protocol to supply you with worthwhile ideas to universal hindrances encountered while imposing an IGP- or EGP-based community.
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13: Explain the difference between Network Address Translation (NAT) and Port Address Translation (PAT). 14: Address the network depicted in Figure 2-19 by Figure 2-19 Exercise Network 46 • • • 15: Organization Geographical location Topology Which addressing scheme is the best? Is there any way to combine two differenet addressing schemes to provide administrative ease? 47 Chapter 3. Redundancy A single point of failure is any device, interface on a device, or link that can isolate users from the services they depend on if it fails.
Provide route to nearest distribution layer router with access to the core. Hide topology of core and distribution layer from access layer devices. The general principles of addressing are • • Use a large address space if possible Leave room for future growth There are four common ways of allocating the address space in a network: first come, first serve, politically, geographically, and topologically. These are covered in Table 2-2. 40 Table 2-2. Summary of Addressing Schemes Addressing Scheme First come, first serve Politically Advantages and Disadvantages Doesn't require any planning.
These methods do not, however, provide redundancy for the devices on the core; they only provide redundancy for the links between the devices. Redundancy for device failures almost always requires a network layer solution or Layer 2 switching. Full Mesh Core Design Full mesh designs, where every core router has a connection to every other core router, provide the most redundancy possible. The design in Figure 3-4 provides the following: Figure 3-4 A Full Mesh Core 52 • • • • A large number of alternate paths to any destination.
Advanced IP network design by Alvaro Retana, Don Slice, Russ White