CCNA Discovery 4 - Chapter 6

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CCNA Discovery 4 - Chapter 6

  1. 1. Using IP Addressing in the Network Design Designing and Supporting Computer Networks – Chapter 6Version 4.0 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 1
  2. 2. Objectives Describe the use of a hierarchical routing and addressing scheme Create the IP address and naming scheme to support growth and efficient routing protocol operation Describe IPv6 implementations and IPv6 to IPv4 interactions Implement IPv6 on a Cisco device © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 2
  3. 3. Describe the Use of a Hierarchical Routing and Addressing SchemeFunctions of a hierarchical addressing scheme: Prevent duplication of addresses Control access, monitor security and performance Support modular design and scalability © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 3
  4. 4. Describe the Use of a Hierarchical Routing and Addressing Scheme Poorly-planned IP addressing can result in discontiguous subnets Routing protocols may display more than one summary route to discontiguous subnets Manual configuration of routing protocols may be required © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 4
  5. 5. Describe the Use of a Hierarchical Routing and Addressing Scheme VLSM provides more efficient use of IP address space VLSM enables routers to summarize routes on classless boundaries © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 5
  6. 6. Describe the Use of a Hierarchical Routing and Addressing Scheme CIDR ignores classful boundaries CIDR enables supernets: VLSMs with shorter prefix lengths than the defaults• Summarization produces leaner routing tables © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 6
  7. 7. Create the IP Address and Naming Scheme Plan the entire addressing scheme in advance Allow for significant growth Support the physical layout, routing, and security © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 7
  8. 8. Create the IP Address and Naming Scheme Define the addressing blocks scheme to support summarization Document locations, VLAN or network type, and number of hosts and networks © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 8
  9. 9. Create the IP Address and Naming Scheme Select the appropriate routing protocol to use in the network Support classless routing and VLSM Small and infrequent updates to reduce traffic Fast convergence © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 9
  10. 10. Create the IP Address and Naming SchemeFactors in designing the routing strategy: Load balancing Authentication © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 10
  11. 11. Create the IP Address and Naming Scheme Determine when and how to summarize address space for efficient routing © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 11
  12. 12. Create the IP Address and Naming Scheme Design an address scheme for an internetwork and assign ranges for hosts, network devices, and the router interface © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 12
  13. 13. Create the IP Address and Naming Scheme Determine an appropriate naming scheme Use codes and avoid names that easily identify protected resources Maintain consistency Document the names © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 13
  14. 14. Describe IPv6 Implementations and IPv6 to IPv4 InteractionsEnhancements available with IPv6: Mobility and security Simpler header Address formatting © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 14
  15. 15. Describe IPv6 Implementations and IPv6 to IPv4 InteractionsCommon transition methods from IPv4 to IPv6: Dual stack Tunneling Proxying and translation © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 15
  16. 16. Describe IPv6 Implementations and IPv6 to IPv4 InteractionsHow to configure IPv6 on a Cisco device: Activate IPv6 forwarding Configure interfaces Configure name resolution © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 16
  17. 17. Describe IPv6 Implementations and IPv6 to IPv4 InteractionsRIPng for IPv6: The tag parameter in interface configuration mode The ipv6 rip name enable command on directly- connected routers © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 17
  18. 18. Summary Allocation of IP addresses must be planned and documented. A properly-designed hierarchical IP addressing scheme makes it easier to perform route summarization. A complex hierarchy of variable-sized networks can be summarized at various points using a prefix address. The choice of routing protocol must support the VLSM and summarization strategy. A good network naming scheme makes the network easier to manage and easier to navigate. IPv6 addresses are written as a series of eight 16-bit hexadecimal digits separated by colons. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 18
  19. 19. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 19

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