The document discusses Point-to-Point Protocol (PPP) and serial communication. It describes PPP concepts including the Link Control Protocol (LCP) and Network Control Protocol (NCP) layers. It also covers PPP frame formats, connection establishment phases, configuration options for authentication, and debugging tools for troubleshooting PPP connections.

1. Protocolo Punto a Punto
(PPP)
Accediendo la WAN – Capítulo 2
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2. Objetivos
Describir los conceptos fundamentales de la
comunicación serial punto a punto.
Describir los conceptos claves acerca del PPP.
Configurar la encapsulación PPP.
Explicar y configurar la autenticación PAP y CHAP.
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3. 2.1 Enlaces seriales punto a
punto
Accediendo la WAN – Capítulo 2
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4. ¿Cómo funciona la comunicación serial?
Comunicación Serial y Paralela
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5. ¿Cómo funciona la comunicación serial?
Sesgo de reloj de la Comunicación Paralela
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6. Proceso de la comunicación serial
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7. Conector de 9 pins (RS 232)
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8. Multiplexación por división de tiempo (TDM)
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9. Ejemplos de TDM
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10. Punto de Demarcación
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11. Conexiones Seriales DCE / DTE
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12. Protocolos de encapsulación WAN
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13. Formato de la trama estándar y cHDLC
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14. Tipos de tramas HDLC
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15. Configuración del Encapsulamiento
HDLC
El HDLC de Cisco es un protocolo de punto a punto
que puede utilizarse en líneas alquiladas entre dos dispositivos Cisco.
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16. Diagnóstico de fallas de una interface serial
Se pueden identificar cinco estados problemáticos de
la línea de estado de la interfaz en la salida de show
interfaces serial:
– Serial x is down, line protocol is down
– Serial x is up, line protocol is down
– Serial x is up, line protocol is up (looped)
– Serial x is up, line protocol is down (disabled)
– Serial x is administratively down, line protocol is down
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17. 2.2 Conceptos del Protocolo
Punto a Punto (PPP)
Accediendo la WAN – Capítulo 2
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18. Point to Point Protocol (PPP)
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19. Arquitecturas de capa PPP – Capa física
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20. Arquitecturas de capa PPP – Capa LCP
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21. Arquitecturas de capa PPP – Capa NCP
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22. Campos de una trama PPP
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23. Establecimiento de una sesión PPP
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24. Establecimiento del enlace
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25. Negociación del enlace
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26. Códigos de LCP
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27. Opciones LCP
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28. Opción de configuración PPP
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29. Campos de Opciones LCP
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30. Proceso NCP
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31. 2.3 Configuración de PPP
Accediendo la WAN – Capítulo 2
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32. Comandos de configuración de opciones PPP
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33. Verificación de PPP
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34. Comandos de configuración PPP
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35. Depuración de PPP
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36. Protocolos de autenticación PPP
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37. Autenticación PAP
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38. Autenticación CHAP
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39. Ejemplo de autenticación CHAP
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40. El comando “ppp authentication”
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41. Configuración de autenticación PAP
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42. Configuración de autenticación CHAP
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43. Resumen
Las comunicaciones seriales y paralelas
TDM / STDM / Punto de Demarcación / DTE – DCE
Protocolos de encapsulación WAN
La trama HDLC y Chdlc / Tipos de tramas HDLC
(información, supervisión y no numerada)
Diagnósticos de fallas en los enlaces seriales:
–Serial x is down, line protocol is down
–Serial x is up, line protocol is down
–Serial x is up, line protocol is up (looped)
–Serial x is up, line protocol is down (disabled)
–Serial x is administratively down, line protocol is down
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44. Resumen
Arquitectura PPP
– LCP
– NCP
La trama PPP
Fases de la conexión PPP
– Establecimiento / Negociación del enlace
– Autenticación / Opciones
– Proceso NCP
Configuración:
– Autenticación
– Opciones
– Verificación
– Depuración
– Resolución de problemas
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