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CCNA 4 v3.0 Module 4 ISDN and DDR

CCNA 4 v3.0 Module 4 ISDN and DDR. Objectives. ISDN concepts ISDN configuration DDR configuration. Digital Communication with ISDN. ISDN Benefits. ISDN Standards. ISDN Standards.

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CCNA 4 v3.0 Module 4 ISDN and DDR

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  1. CCNA 4 v3.0 Module 4ISDN and DDR

  2. Objectives • ISDN concepts • ISDN configuration • DDR configuration

  3. Digital Communication with ISDN

  4. ISDN Benefits

  5. ISDN Standards

  6. ISDN Standards • E Protocols – Recommend telephone network standards for ISDN. For example, the E.164 protocol describes international addressing for ISDN. • I Protocols – Deal with concepts, terminology, and general methods. The I.100 series includes general ISDN concepts and the structure of other I-series recommendations. I.200 deals with service aspects of ISDN. I.300 describes network aspects. I.400 describes how the UNI is provided. • Q Protocols – Cover how switching and signaling should operate. The term signaling in this context means the process of establishing an ISDN call.

  7. ISDN Access Options

  8. ISDN 3-Layer Model

  9. Q.931 Messaging-Call Setup Example

  10. Call Processing • The D channel is used to send the called number to the local ISDN switch. • The local switch uses the SS7 signaling protocol to set up a path and pass the called number to the remote ISDN switch. • The remote ISDN switch signals the destination over the D channel. • The destination ISDN NT-1 device sends the remote ISDN switch a call-connect message. • The remote ISDN switch uses SS7 to send a call-connect message to the local switch. • The local ISDN switch connects one B channel end-to-end, leaving the other B channel available for a new conversation or data transfer. Both B channels can be used simultaneously.

  11. ISDN Functions and Reference Points

  12. ISDN Functions and Reference Points

  13. BRI Reference Points

  14. Cisco ISDN BRI Interfaces

  15. S/T ISDN Interface U ISDN Interface ISDN Interfaces

  16. ISDN Switch Types

  17. Configuring ISDN BRI

  18. Configuring ISDN BRI

  19. Configuring ISDN PRI

  20. Switch Types Available for ISDN PRI Configuration

  21. ISDN PRI Examples

  22. Verifying ISDN Configuration

  23. Troubleshooting ISDN Configuration

  24. DDR Operation

  25. Legacy DDR • Legacy DDR is a term used to define a very basic DDR configuration in which a single set of dialer parameters is applied to an interface. If multiple unique dialer configurations are needed on one interface, then dialer profiles should be used. • To configure legacy DDR perform the following steps: • Define static routes • Specify interesting traffic • Configure the dialer information

  26. DDR Operation

  27. Configuring Legacy DDR

  28. Defining Static Routes • When configuring static routes, consider the following: • By default, a static route will take precedence over a dynamic route because of its lower administrative distance. Without additional configuration, a dynamic route to a network will be ignored if a static route is present in the routing table for the same network. • To reduce the number of static route entries, define a summarized or default static route

  29. Specifying Interesting Traffic

  30. Configuring Dialer Information - PPP

  31. The dialer-group Command

  32. The dialer-map Command

  33. The dialer idle-timeout Command

  34. Dialer Profiles Overview • Define encapsulation and access control lists • Determine minimum or maximum calls • Turn features on or off

  35. Dialer Profile Elements

  36. Configuring Dialer Interfaces

  37. Verifying DDR • show dialer • show dialer interface [BRI] • show isdn active • show isdn status

  38. clear interface bri • This command will clear the hardware logic for the specified slot/port. This is often used with ISDN BRI interfaces to force the interface to resend the SPIDs.

  39. Troubleshooting DDR • debug isdn q921 • debug isdn q931 • debug dialer [events|packets] • isdn call interface • clear interface bri

  40. Objectives • ISDN concepts • ISDN configuration • DDR configuration

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