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CCNA Discovery 4 - Chapter 8
- 1. Prototyping the WAN
Designing and Supporting Computer Networks – Chapter 8
Version 4.0 © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 1
- 2. Objectives
Describe the methods to prototype remote
connectivity support
Prototype the WAN Connectivity
Prototype the VPN connectivity for remote workers
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 2
- 3. Describe the Methods to Prototype Remote
Connectivity Support
Simulation software
Prototype testing using simulated links
Pilot testing in the actual environment
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 3
- 4. Describe the Methods to Prototype Remote
Connectivity Support
Benefits of using simulation software to test remote
connectivity:
Lower overall cost
Flexibility
Scalability
Control
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 4
- 5. Describe the Methods to Prototype Remote
Connectivity Support
Limitations of using simulation software to test the
design:
Limited functionality
Unrealistic performance
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 5
- 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
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 6
- 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
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 7
- 8. Prototype the WAN Connectivity
Create a success criteria checklist to support business
goals and technical requirements
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 8
- 9. Prototype the WAN Connectivity
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
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 9
- 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
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 10
- 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
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 11
- 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
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 12
- 13. Prototype the WAN Connectivity
Provide and test backup capabilities:
Set up Ethernet connections
Create floating static routes
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 13
- 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
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 14
- 15. Prototype the WAN Connectivity
Identify areas of risk and weakness in the design
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 15
- 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
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 16
- 17. Prototype the VPN Connectivity for Remote
Workers
Create a success criteria checklist to support business
goals and technical requirements
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 17
- 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
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 18
- 19. Prototype the VPN Connectivity for Remote
Workers
Validate the choice of VPN technology, devices, and
topologies
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 19
- 20. Prototype the VPN Connectivity for Remote
Workers
Prototype the Remote Worker Support:
IPSec
Split tunnels
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 20
- 21. Prototype the VPN Connectivity for Remote
Workers
Validate the placement of the VPN server and access
list filtering in the prototype network
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 21
- 22. Prototype the VPN Connectivity for Remote
Workers
Identify risks or weaknesses in the VPN design
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 22
- 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.
© 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 23
- 24. © 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 24