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Presentation_ID 1 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential Classful Addressing Classful Network Addressing
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Presentation_ID 2 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential Classful Addressing Classful Subnet Masks
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Presentation_ID 3 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential Classful Addressing Classful Routing Protocol Example
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Presentation_ID 4 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential Classful Addressing Classful Addressing Waste
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Presentation_ID 5 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential VLSM Fixed Length Subnet Masking
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Presentation_ID 6 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential VLSM VLSM Example
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Presentation_ID 7 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential VLSM Variable Length Subnet Masking
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Presentation_ID 8 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential VLSM VLSM in Action VLSM allows the use of different masks for each subnet. After a network address is subnetted, those subnets can be further subnetted. VLSM is simply subnetting a subnet. VLSM can be thought of as sub-subnetting. Individual host addresses are assigned from the addresses of "sub-subnets".
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Presentation_ID 9 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential VLSM Subnetting Subnets
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Presentation_ID 10 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential CIDR Classless Inter-Domain Routing
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Presentation_ID 11 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential CIDR CIDR and Route Summarization
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Presentation_ID 12 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential CIDR Static Routing CIDR Example
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Presentation_ID 13 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential CIDR Classless Routing Protocol Example
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Presentation_ID 14 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential Types of Static Routes Summary Static Route
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Presentation_ID 15 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential Configure IPv4 Summary Routes Route Summarization Route summarization, also known as route aggregation, is the process of advertising a contiguous set of addresses as a single address with a less- specific, shorter subnet mask. CIDR is a form of route summarization and is synonymous with the term supernetting. CIDR ignores the limitation of classful boundaries, and allows summarization with masks that are smaller than that of the default classful mask. This type of summarization helps reduce the number of entries in routing updates and lowers the number of entries in local routing tables.
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Presentation_ID 16 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential Configure IPv4 Summary Routes Calculate a Summary Route
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Presentation_ID 17 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential Configure IPv4 Summary Routes Summary Static Route Example
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Presentation_ID 18 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential B 150.17.11.2 Netzmaske CIDR /17 -Supernetting -Summarization Subnetting
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