ppp协议.ppt

1教学目标( 教学目标( Objectives Objectives ) ) ? 1. PPP 组成( ponents ) ?2. PPP 会话建立( PPP Session Establishment ) ? 3. PPP 认证( PPP Authentication ) ?4. PAP 和 CHAP 配置( Configure CHAP and PAP ) ? PPP ( Verify PPP configuration ) 2 专线 Leased Line 同步串行线路( Synchronous serial ) pany 电路交换 Circuit-switched 异步串行线路 Asynchronous serial , ISDN Layer 1 Service Provider 分组交换 Packet-switched Synchronous serial 广域网连接类型:第一层广域网连接类型:第一层( ( WAN Connection Types: Layer 1 WAN Connection Types: Layer 1 ) ) 3 串行线路点到点连接( Serial Point-to-Point Connections ) 串行线路点到点连接串行线路点到点连接( ( Serial Point-to-Point Connections Serial Point-to-Point Connections ) ) Router connections EIA/TIA-232 EIA/TIA-449 EIA-530 CSU/ DSU End user device Service Provider DTE DCE4 专线(Leased Line ) 电路交换(Circuit-switched ) PPP, SLIP, HDLC HDLC, PPP, SLIP 包交换(Packet-switched ) , Frame Relay, ATM 第二层典型的广域网封装协议第二层典型的广域网封装协议( ( Typical WAN Encapsulation Protocols: Typical WAN Encapsulation Protocols: Layer 2 Layer 2 ) ) pany Service Provider HDLC HDLC 命令( 命令( mand mand ) ) Router(config-if)# encapsulation hdlc ?HDLC 是串行线路的默认封装?HDLC is the default encapsulation on synchronous serial interfaces 56 PPP PPP 组成( 组成( ponents ponents ) ) ? 1. HDLC ? PPP 用 HDLC 作为点到点链路上基本的封装方法. ? PPP uses (HDLC) as a basis for encapsulating datagrams over point-to-point links. ? 2. LCP ?建立、配置和测试数据链路的连接? Establishing, configuring, and testing the data-link connection. ? 3. NCP ?建立和配置不同的网络层协议? Establishing and configuring work-layer protocols. PPP Encapsulation TCP/IP Novell IPX AppleTalk Multiple protocol encapsulations using NCPs in PPP ? PPP 用 NCP 进行多种协议的封装? PPP can carry packets from several protocol suites using Network Control Programs ? PPP 用 LCP 进行链路的建立与控制? PPP controls the setup of several link options using LCP Link setup and control using LCP in PPP PPP PPP 组成( 组成( ponents ponents ) ) 7 Synchronous or Asynchronous 物理介质( Physical Media ) 链路控制协议( Link Control Protocol ) Authentication, other options 网络控制协议( Network Cont