256 Kbps PVC DLCI 40 DLCI 30 RTA
帧中继基本概念 接入线路( 256 Kbps) PVC DLCI 40 DLCI 30 RTA DTE LM I RTB DLCI 20 DCE PVC NNI LM NNI 接入线路( 64 Kbps) 帧中继网络 I DCE DTE DLCI 30 RTC 接入线路( 128 Kbps) www. h 3 c. com
LMI 帧中继网络 RTB RTA DLCI 48 DTE 172. 16. 11. 2 DLCI 66 DCE Status Inquiry Status:DLCI 48状态Active DCE 172. 16. 11. 3 Status Inquiry Status:DLCI 66状态Active Keepalive www. h 3 c. com DTE Keepalive
LMI协议标准 ANSI T 1. 617 Annex D ITU-T (CCITT) Q. 933 Annex A Cisco 兼容 Gang of Four l 系统支持三种标准的LMI协议 l DTE和DCE必须采用相同的LMI协议 www. h 3 c. com
Inverse ARP 帧中继网络 RTB RTA DLCI 48 DTE 172. 16. 11. 2 DLCI 66 DCE 172. 16. 11. 3 DTE Inverse ARP RTB向DCLI 48 通告IP 172. 16. 11. 2 Inverse ARP RTA向DLCI 66 通告IP 172. 16. 11. 3 l 通过Inverse ARP可以自动发现对端路由 器的网络地址,从而简化了帧中继的配置 www. h 3 c. com
帧中继子接口 1. 1. 1. 2/30 RTB point-to-point 2. 2/29 1. 1/30 S 0/0. 1 S 0/0. 2 RTC RTA 2. 2. 2. 1/29 RTD l 2. 2. 2. 3/29 point-to-multipoint 帧中继网络 可以为帧中继物理接口配置点到点(point-topoint)和点到多点(point-to-multipoint)两 种子接口 www. h 3 c. com
帧中继基本配置命令 l 接口封装帧中继协议 [Router-Serial 1/0] link-protocol fr [ ietf | nonstandard ] l 手 配置静态映射 [Router-Serial 1/0] fr map ip { ip-address [ mask ] | default } dlci-number [ broadcast | [ nonstandard | ietf ] l 配置LMI类型 [Router-Serial 1/0] fr lmi type { ansi | nonstandard | q 933 a } www. h 3 c. com
帧中继基本配置命令(续) l 配置帧中继接口的类型 [Router-Serial 1/0] fr interface-type { dce | dte | nni } l 为帧中继接口分配虚电路号 [Router-Serial 1/0] fr dlci-number l 创建帧中继子接口 [Router-Serial 1/0] interface serial interfacenumber. subnumber [ p 2 p | p 2 mp ] www. h 3 c. com
配置帧中继交换 l 启动帧中继交换功能 [Router] fr switching l 配置帧中继接口类型 [Router-Serial 1/0] fr interface-type { dce | dte | nni } l 配置DLCI路由 [Router-Serial 1/0] fr dlci-switch in-dlci interface -type interface-number dlci out-dlci www. h 3 c. com
帧中继配置示例 RTB 帧中继网络 RTA S 1/0 1. 1/24 S 1/0 DLCI=50 DLCI=70 DLCI=60 DLCI=80 1. 1. 1. 2/24 RTC S 1/0 1. 1. 1. 3/24 [RTA]interface serial 1/0 [RTA-Serial 1/0]link-protocol fr [RTA-Serial 1/0]ip address 1. 1 255. 0 [RTA-Serial 1/0]fr map ip 1. 1. 1. 2 dlci 50 [RTA-Serial 1/0]fr map ip 1. 1. 1. 3 dlci 60 [RTC]interface serial 1/0 [RTC-Serial 1/0]link-protocol fr [RTC-Serial 1/0]ip address 1. 1. 1. 3 255. 0 [RTC-Serial 1/0]fr map ip 1. 1 dlci 80 [RTB]interface serial 1/0 [RTB-Serial 1/0]link-protocol fr [RTB-Serial 1/0]ip address 1. 1. 1. 2 255. 0 [RTB-Serial 1/0]fr map ip 1. 1 dlci 70 www. h 3 c. com
帧中继配置示例 RTB 帧中继网络 RTA S 1/0 1. 1/24 S 1/0 DLCI=50 DLCI=70 DLCI=60 DLCI=80 1. 1. 1. 2/24 RTC S 1/0 1. 1. 1. 3/24 [RTA]interface serial 1/0 [RTA-Serial 1/0]link-protocol fr [RTA-Serial 1/0]ip address 1. 1 255. 0 [RTA-Serial 1/0]fr map ip 1. 1. 1. 2 dlci 50 [RTA-Serial 1/0]fr map ip 1. 1. 1. 3 dlci 60 [RTC]interface serial 1/0 [RTC-Serial 1/0]link-protocol fr [RTC-Serial 1/0]ip address 1. 1. 1. 3 255. 0 [RTC-Serial 1/0]fr map ip 1. 1 dlci 80 [RTB]interface serial 1/0 [RTB-Serial 1/0]link-protocol fr [RTB-Serial 1/0]ip address 1. 1. 1. 2 255. 0 [RTB-Serial 1/0]fr map ip 1. 1 dlci 70 www. h 3 c. com
帧中继显示与调试 l 显示各接口的帧中继协议状态 [Router] display fr interface [ interface-type interfacenumber ] l 显示网络协议地址与帧中继地址映射表 [Router] display fr map-info [ interface-type interface-number ] l 显示LMI协议的配置信息以及统计信息 [Router] display fr lmi-info [ interface-type interface-number ] www. h 3 c. com
帧中继显示与调试(续) l 显示帧中继当前收发数据的统计信息 [Router] display fr interface [ interface-type interfacenumber ] l 显示帧中继永久虚电路状态和虚电路收 发数据的统计信息 [Router] display fr map-info [ interface-type interface-number ] l 显示帧中继PVC交换表 [Router] display fr lmi-info [ interface-type interface-number ] www. h 3 c. com
配置RIP peer 1. 1. 1. 2/24 RTB 帧中继网络 RIP 1. 1. 1. 3/24 单播 1. 1/24 RIP单播更新 RTC 更新 S 0/0 RTA 更新 RTD 1. 1. 1. 4/24 [RTA]rip [RTA-rip-1]network 1. 0. 0. 0 [RTA-rip-1]peer 1. 1 播 RIP单 [RTA]rip [RTA-rip-1]network 1. 0. 0. 0 [RTA-rip-1]peer 1. 1. 1. 2 [RTA-rip-1]peer 1. 1. 1. 3 [RTA-rip-1]peer 1. 1. 1. 4 帧中继网络不支持RIP更新的广播发送 l 需要在路由器上配置各个RIP邻居路由器的IP地址,以便通过 单播发送更新 l www. h 3 c. com
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