Alvaro Retana, Don Slice, Russ White's Advanced IP network design PDF


By Alvaro Retana, Don Slice, Russ White

ISBN-10: 1578700973

ISBN-13: 9781578700974

Complex IP community layout presents the options community engineers and bosses have to develop and stabilize huge IP networks. expertise developments and company development necessarily bring about the need for community growth. This ebook provides layout ideas and strategies that permit networks to adapt into assisting better, extra advanced functions whereas holding serious balance. complex IP community layout will give you a uncomplicated origin to appreciate and enforce the best community layout round the community middle, distribution and entry layers, and the typical and side community companies. After constructing an effective hierarchical community layout, you'll learn how to practice OSPF, IS-IS, EIGRP, BGP, NHRP, and MPLS. Case reviews help each one protocol to supply you with helpful options to universal obstacles encountered while enforcing an IGP- or EGP-based community.

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In this case, the default route points to a point-to-point interface, which means there will not be any ARP cache entries against this interface. ) There is one advantage to Router B's configuration—speed. Suppose that Router B has a dial backup link to the Internet, which is activated through a floating static route. If serial 0 goes down, Router B will take the directly connected network out of its routing table immediately. The static route to the next hop, however, could take up to one second to remove from the routing table because Router B will need to go through the process of realizing that the recursive route to the next hop is down.

The second fiber is used as a redundant path. If the first fiber is cut or becomes otherwise unusable, traffic is automatically shifted to the second fiber. FDDI is another technology that provides this sort of redundancy with two rings on which the data rotates in opposite directions (two counter rotating rings). If the fiber fails at any point between two dual attached nodes (devices that are attached to both rings), the ring will wrap, healing the break. These technologies provide the redundancy at Layer 2 in the OSI model, resolving many of the issues with providing redundancy at the network layer.

While this provides very good redundancy—the loss of a single core router or a single link won't make any destinations behind Router A unreachable —it can also create some problems. 0/16 in the core. This doubling of possible routes for every dual-homed distribution layer router slows network convergence. It's sometimes possible to force the metric or cost of one of the two paths to be worse so that traffic will normally flow over only one link. The number of paths is still doubled, so this isn't a very effective solution for advanced routing protocols.

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Advanced IP network design by Alvaro Retana, Don Slice, Russ White

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