By Mark McGregor
For a complicated view of networking layout recommendations that is going from lofty to granular within the blink of an eye fixed, community layout and Case reviews is a definite winner. This titanic access in Cisco's becoming selection of reference books presents equivalent components educational concept and sensible application.The first half the publication offers completely with layout, beginning with an evidence of the 3 forms of networks (campus, extensive region, and distant connections). The e-book outlines the layout developments governing these networks at the present time and explains the units used to create them and their features, in addition to potent how you can combine the 3. the rest chapters veer off into extra particular community varieties, corresponding to Asynchronous move Mode (ATM), web Protocol (IP), and Switched LAN, and the apparatus and protocols most fitted for these situations.The moment half this quantity is devoted to real-word challenge fixing. The eleven "case learn" chapters specialise in rather sticky concerns - corresponding to Routing info Protocol (RIP) and Open Shortest course First (OSPF) redistribution, decreasing carrier advertisements Protocol (SAP) site visitors in Novell Internetwork Packet alternate (IPX) networks, and person Datagram Protocol (UDP) broadcast flooding - and suggest configuration strategies to mend them. As ordinary, this books holds the needful flood of appendices; notwithstanding, during this example the "Reference and advised studying" access is surely the main priceless.
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Additional info for Cisco CCIE Fundamentals: Network Design
If WAN links are faster than 56 Kbps, enabling fast switching on the routers is recommended. When fast switching is enabled, load balancing occurs on a perdestination basis. Routers can automatically compensate for failed WAN links through routing algorithms of protocols, such as IGRP, OSPF, and IS-IS. If one link fails, the routing software recalculates the routing algorithm and begins sending all traffic through another link. This allows applications to proceed in the face of WAN link failure, improving application availability.
To protect against local and site-wide power outages, some companies have negotiated an arrangement with local power companies to use multiple power grids within their organization. Failure within one power grid will not affect the network if all critical components have access to multiple power grids. Unfortunately, this arrangement is very expensive and should only be considered by companies with substantial resources, extremely mission-critical operations, and a relatively high likelihood of power failures.
IP tunneling also allows network designers to implement policies, such as which types of traffic can use which routes or assignment of priority or security levels to particular traffic. Capabilities like these are lacking in many native LAN protocols. IP tunneling provides communication between subnetworks that have invalid or discontiguous network addresses. With tunneling, virtual network addresses are assigned to subnetworks, making discontiguous subnetworks reachable. 0 to talk to each other even though they are separated by another network.
Cisco CCIE Fundamentals: Network Design by Mark McGregor