© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 1Version 4.0
Prototyping the WAN
Designing and Supporting Com...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 2
Objectives
 Describe the methods to prototype remote
conne...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 3
Describe the Methods to Prototype Remote
Connectivity Suppo...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 4
Describe the Methods to Prototype Remote
Connectivity Suppo...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 5
Limitations of using simulation software to test the
design...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 6
Describe the Methods to Prototype Remote
Connectivity Suppo...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 7
Prototype the WAN Connectivity
 Identify business goals an...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 8
Prototype the WAN Connectivity
 Create a success criteria ...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 9
Determine the elements of the simulated WAN
connection:
 S...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 10
Prototype the WAN Connectivity
Validate the choice of WAN ...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 11
Prototype the WAN Connectivity
 Configure the router to a...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 12
Prototype the WAN Connectivity
Verify that the Frame Relay...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 13
Provide and test backup capabilities:
 Set up Ethernet co...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 14
Prototype the WAN Connectivity
 Troubleshoot Layer 1 usin...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 15
Prototype the WAN Connectivity
 Identify areas of risk an...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 16
Prototype the VPN Connectivity for Remote
Workers
Determin...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 17
Prototype the VPN Connectivity for Remote
Workers
 Create...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 18
Prototype the VPN Connectivity for Remote
Workers
 Verify...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 19
Prototype the VPN Connectivity for Remote
Workers
 Valida...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 20
Prototype the VPN Connectivity for Remote
Workers
Prototyp...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 21
Prototype the VPN Connectivity for Remote
Workers
 Valida...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 22
Prototype the VPN Connectivity for Remote
Workers
 Identi...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 23
Summary
 Every Frame Relay link has three components: a l...
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 24
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Chapter 8

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Chapter 8

  1. 1. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 1Version 4.0 Prototyping the WAN Designing and Supporting Computer Networks – Chapter 8
  2. 2. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 2 Objectives  Describe the methods to prototype remote connectivity support  Prototype the WAN Connectivity  Prototype the VPN connectivity for remote workers
  3. 3. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 3 Describe the Methods to Prototype Remote Connectivity Support  Simulation software  Prototype testing using simulated links  Pilot testing in the actual environment
  4. 4. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 4 Describe the Methods to Prototype Remote Connectivity Support Benefits of using simulation software to test remote connectivity:  Lower overall cost  Flexibility  Scalability  Control
  5. 5. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 5 Limitations of using simulation software to test the design:  Limited functionality  Unrealistic performance Describe the Methods to Prototype Remote Connectivity Support
  6. 6. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 6 Describe the Methods to Prototype Remote Connectivity Support Simulate WAN connectivity in a prototype lab:  Use Ethernet connection to simulate DSL or cable  Use CSU/DSU, serial modems, or V.35 cables to simulate serial connectivity
  7. 7. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 7 Prototype the WAN Connectivity  Identify business goals and technical requirements from the case study and determine which of these goals and requirements can be tested in the prototype
  8. 8. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 8 Prototype the WAN Connectivity  Create a success criteria checklist to support business goals and technical requirements
  9. 9. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 9 Determine the elements of the simulated WAN connection:  Simulate the Frame Relay connection using a Cisco router acting as a Frame Relay switch  Simulate a crossover function using V.35 cables  Provide the DCE function with a clock rate Prototype the WAN Connectivity
  10. 10. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 10 Prototype the WAN Connectivity Validate the choice of WAN devices and topologies:  Local point-to-point circuit  Packet-switched network  Remote point-to-point circuit
  11. 11. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 11 Prototype the WAN Connectivity  Configure the router to act as the Frame Relay switch  Configure serial interfaces as DCE devices  Configure Layer 3 addresses and encapsulation type
  12. 12. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 12 Prototype the WAN Connectivity Verify that the Frame Relay WAN operates as expected:  Display the status of the interfaces  Verify the exchange of LMI messages  Display the status of PVCs and the Frame Relay maps
  13. 13. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 13 Provide and test backup capabilities:  Set up Ethernet connections  Create floating static routes Prototype the WAN Connectivity
  14. 14. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 14 Prototype the WAN Connectivity  Troubleshoot Layer 1 using the show interface serial command  Troubleshoot Layer 2 using the show frame-relay lmi command  Check Layer 3 functionality
  15. 15. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 15 Prototype the WAN Connectivity  Identify areas of risk and weakness in the design
  16. 16. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 16 Prototype the VPN Connectivity for Remote Workers Determine which business goals and technical requirements can be tested in the prototype:  VPN security  VPN server location
  17. 17. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 17 Prototype the VPN Connectivity for Remote Workers  Create a success criteria checklist to support business goals and technical requirements
  18. 18. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 18 Prototype the VPN Connectivity for Remote Workers  Verify the use of Cisco EasyVPN to configure a VPN server and set up the client software
  19. 19. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 19 Prototype the VPN Connectivity for Remote Workers  Validate the choice of VPN technology, devices, and topologies
  20. 20. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 20 Prototype the VPN Connectivity for Remote Workers Prototype the Remote Worker Support:  IPSec  Split tunnels
  21. 21. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 21 Prototype the VPN Connectivity for Remote Workers  Validate the placement of the VPN server and access list filtering in the prototype network
  22. 22. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 22 Prototype the VPN Connectivity for Remote Workers  Identify risks or weaknesses in the VPN design
  23. 23. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 23 Summary  Every Frame Relay link has three components: a local point-to-point circuit, the packet-switched network, and a remote point-to-point circuit.  Frame Relay is a nonbroadcast multi-access protocol.  One way to configure routers to use a backup link when a primary link fails is to create floating static routes.  VPNs have two important components: tunneling and encryption.  Encryption algorithms such as DES require a symmetric, shared secret key.  IPSec provides data confidentiality, integrity, and authentication at Layer 3.
  24. 24. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 24

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