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If the number of networkĪddresses is not contiguous or not a power of 2, you can divide the addresses Must take place on binary boundaries (powers of 2). Summary masks are binary masksjust like subnet masksso summarization For example, 4,ġ6, or 512 addresses can be represented by a single routing entry because The network addresses are in contiguous blocks in powers of 2. Route summarization is most effective within a subnetted environment when Route summarization is possible only when a proper addressing plan is in Router E also saves CPU resources, because it evaluates packets againstġ-16 Routers Can Summarize to Reduce the Number of Routesįlapping is a common term used to describe intermittent interface or link Router E needs to maintain only one route and therefore saves If routerĭ summarizes the information into a single network number entry, theīandwidth is saved on the link between routers D and E.
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#Summary route calculator series#
Maintain, because it is a method of representing a series of network numbers inįor example, in Figure 1-16, router D can either send four routing updateĮntries or summarize the four addresses into a single network number. Or supernetting) can reduce the number of routes that a router must Route summarization (also called route aggregation It is often problematic for routers to maintain this volume of routes in In large internetworks, hundreds, or even thousands, of network addresses canĮxist. In route summarization, a group of subnets is rolled up into a summarized With VLSM, you break a block of addresses into smaller subnets Interdomain Routing." The relationship between summarization and VLSM isĪlso examined. This sectionĭescribes summarization CIDR is covered in the later section "Classless
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Summarization and CIDR, you can implement a scalable network. Summarization and CIDR techniques can manage this corporate growth much Resources, memory, and bandwidth used to maintain the routing table. Network addresses in routing tables is increasing rapidly. As the result of corporate expansion and mergers, the number of subnets and
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