帧中继（ Frame Relay）是一种用于连接计算机系统的面向分组的通信方法。它主要用在公共或专用网上的局域网互联以及广域网连接。大多数公共电信局都提供帧中继服务，把它作为建立高性能的虚拟广域连接的一种途径。帧中继是进入带宽范围从56Kbps到1．544Mbps的广域分组交换网的用户接口
下面有一案列
使用小凡模拟器 利用6台路由器
下面是配置步骤：
fr-1 配置
Router>en
Router#config t
Router(config)#line console 0
Router(config-line)#logging synchronous
Router(config-line)#no exec-timeout
Router(config)#frame-relay switching [变为帧中继节点]
Router(config)#int s0/0【进接口】
Router(config-if)#encapsulation【封装】
Router(config-if)#encapsulation frame-relay【封装帧中继】
Router(config-if)#frame-relay intf-type dce【帧中继类型dce】
Router(config-if)#clock rate 64000【设置时钟】
Router(config-if)#frame-relay lmi-type cisco 【指明信令类型】
Router(config-if)#frame-relay route 100 interface s0/1 101【转发表】
Router(config-if)#frame-relay route 200 interface s0/2 201【转发表】
Router(config-if)#no sh【端口开启】
Router#show running-config【查看配置】
Router(config)#hostname fr-1
fr-1(config)#int s0/1
fr-1(config-if)#encapsulation frame-relay
fr-1(config-if)#frame-relay intf-type dce
fr-1(config-if)#clock rate 64000
fr-1(config-if)#frame-relay lmi-type cisco
fr-1(config-if)#frame-relay route 101 interface s0/0 100【s0/1出入管道】
fr-1(config)#int s0/2
no sh
fr-1(config-if)#encapsulation frame-relay
fr-1(config-if)#frame-relay intf-type dce
fr-1(config-if)#clock rate 64000
fr-1(config-if)#frame-relay lmi-type cisco
fr-1(config-if)#frame-relay route 201 interface s0/0 200【s0/2出入管道】
fr-2配置
Router(config)#hostname fr-2
fr-2(config)#line console 0
fr-2(config-line)#logging synchronous
fr-2(config-line)#no exec-timeout
fr-2(config)#frame-relay switching
fr-2(config)#int s0/0
fr-2(config-if)#encapsulation frame-relay
fr-2(config-if)#frame-relay intf-type dce
fr-2(config-if)#clock rate 64000
fr-2(config-if)#frame-relay lmi-type cisco
fr-2(config-if)#frame-relay route 102 interface s0/1 101
fr-2(config-if)#no sh
fr-2(config-if)#int s0/1
fr-2(config-if)#no sh
fr-2(config-if)#encapsulation frame-relay
fr-2(config-if)#frame-relay intf-type dte
fr-2(config-if)#frame-relay lmi-type cisco
fr-2(config-if)#frame-relay route 101 interface s0/0 102
fr-2#show frame-relay pvc【查看封装】
fr-3配置
Router>en
Router#config t
Router(config)#line console 0
Router(config-line)#logging synchronous
Router(config-line)#no exec-timeout
fr-3(config)#int s0/0
fr-3(config-if)#no sh
fr-3(config-if)#encapsulation frame-relay
fr-3(config-if)#frame-relay intf-type dce
fr-3(config-if)#clock rate 64000
fr-3(config-if)#frame-relay lmi-type cisco
fr-3(config-if)#frame-relay route 202 interface s0/2 201
fr-3(config)#int s0/2
fr-3(config-if)#no sh
fr-3(config-if)#encapsulation frame-relay
fr-3(config-if)#frame-relay intf-type dte
fr-3(config-if)#frame-relay lmi-type cisco
fr-3(config-if)#frame-relay route 201 interface s0/0 202
frame-relay 配置[ospf ]
r1
Router(config)#hostname r1
r1(config)#line console 0
r1(config-line)#logging synchronous
r1(config-line)#no exec-timeout
r1(config)#int s1/0
r1(config-if)#encapsulation frame-relay
r1(config-if)#frame-relay lmi-type cisco
r1(config-if)#no sh
r1(config)#int s1/0.1 point-to-point
r1(config-subif)#ip add 192.168.4.1 255.255.255.0
r1(config-subif)#frame-relay interface-dlci 100
r1(config)#int s1/0.2 point-to-point
r1(config-subif)#ip add 192.168.5.1 255.255.255.0
r1(config-subif)#frame-relay interface-dlci 200
r1(config)#router ospf 1
r1(config-router)#network 192.168.1.0 255.255.255.0 area 0
r1(config-router)#network 192.168.4.0 255.255.255.0 area 0
r1(config-router)#network 192.168.5.0 255.255.255.0 area 0
R2
Router(config)#hostname r2
r2(config)#line console 0
r2(config-line)#logging synchronous
r2(config-line)#no exec-timeout
r2(config-line)#int s1/0
r2(config-if)#encapsulation frame-relay
r2(config-if)#frame-relay lmi-type cisco
r2(config-if)#no sh
r2(config)#int s1/0.1 point-to-point
r2(config-subif)#ip add 192.168.4.2 255.255.255.0
r2(config-subif)#frame-relay interface-dlci 102
r2(config)#router ospf 1
r2(config-router)#network 192.168.4.0 255.255.255.0 area 0
r2(config-router)#network 192.168.2.0 255.255.255.0 area 0
R3
Router(config)#hostname r3
r3(config)#line console 0
r3(config-line)#logging synchronous
r3(config-line)#no exec-timeout
r3(config-line)#int s1/0
r3(config-if)#encapsulation frame-relay
r3(config-if)#frame-relay lmi-type cisco
r3(config-if)#no sh
r3(config)#int s1/0.1 point-to-point
r3(config-subif)#ip add 192.168.5.2 255.255.255.0
r3(config-subif)#frame-relay interface-dlci 202
r3(config)#router ospf 1
r3(config-router)#network 192.168.5.0 255.255.255.0 area 0
r3(config-router)#network 192.168.3.0 255.255.255.0 area 0
结果：
frame-relay 配置[静态路由]
r1
Router(config)#hostname r1
r1(config)#line console 0
r1(config-line)#logging synchronous
r1(config-line)#no exec-timeout
r1(config)#int f0/0
r1(config-if)#ip add 192.168.1.1 255.255.255.0
r1(config-if)#no sh
r1(config-if)#int s1/0
r1(config-if)#ip add 192.168.4.1 255.255.255.0
r1(config-if)#ip add 192.168.5.1 255.255.255.0 sec
r1(config-if)#ip add 192.168.5.1 255.255.255.0 secondary 【辅助地址】
r1(config-if)#no sh
r1(config-if)#encapsulation frame-relay
r1(config-if)#frame-relay lmi-type cisco
r1(config-if)#frame-relay map ip 192.168.4.2 100【映射】
r1(config-if)#frame-relay map ip 192.168.5.2 200 【映射】
R2
Router(config)#hostname r2
r2(config)#line console 0
r2(config-line)#logging synchronous
r2(config-line)#no exec-timeout
r2(config-line)#int f0/0
r2(config-if)#ip add 192.168.2.1 255.255.255.0
r2(config-if)#no sh
r2(config)#int s1/0
r2(config-if)#ip add 192.168.4.2 255.255.255.0
r2(config-if)#encapsulation frame-relay
r2(config-if)#frame-relay lmi-type cisco
r2(config-if)#frame-relay map ip 192.168.4.1 102
R3
Router(config)#hostname r3
r3(config)#line console 0
r3(config-line)#logging synchronous
r3(config-line)#no exec-timeout
r3(config-line)#int f0/0
r3(config-if)#ip add 192.168.3.1 255.255.255.0
r3(config-if)#no sh
r3(config-if)#int s1/0
r3(config-if)#ip add 192.168.5.2 255.255.255.0
r3(config-if)#no sh
r3(config-if)#encapsulation frame-relay
r3(config-if)#frame-relay lmi-type cisco
r3(config-if)#frame-relay map ip 192.168.5.1 202
静态路由
