实验过程：
第一步：配置R1为帧中继交换机
R1(config)#fr swi （封装为帧中继交换机，非常重要的一步）
**R1(config)#int s1/2
R1(config-if)#en fr
R1(config-if)#frame-relay intf-type dce (帧中继接口类型为DCE)
R1(config-if)#frame-relay route 23 interface s1/3 32 **
（配置本地dlci为23，出口为s1/3，dlci为32）
R1(config-if)#no sh
R1(config-if)#int s1/3
R1(config-if)#en fr
R1(config-if)#frame-relay intf-type dce
R1(config-if)#frame-relay
R1(config-if)#frame-relay route 32 interface s1/2 23
R1(config-if)#
R1(config-if)#no sh
R1(config-if)#exit
第二步：查看R1的帧中继路由
R1#sh fr rou
Input Intf Input Dlci Output Intf Output Dlci Status
Serial1/2 23 Serial1/3 32 inactive
Serial1/3 32 Serial1/2 23 inactive
R1#
第三步：查看R2和R3帧中继接口
R2(config)#
R2(config)#int s2/1
R2(config-if)#en fr
R2(config-if)#no sh
R2(config-if)#ip add 10.0.0.2 255.255.255.0
R2(config-if)#exit
R3(config)#int s3/1 R3(config-if)#en fr R3(config-if)#no sh R3(config-if)#ip add 10.0.0.3 255.255.255.0 R3(config-if)#exit R3(config)# R3(config)#^Z
第四步：现在在R2、R3帧中继客户端上查看frame-relay map
R2#sh fr map Serial2/1 (up): ip 10.0.0.3 dlci 23(0x17,0x470), dynamic, broadcast,, status defined, active R2#
R3#sh fr map Serial3/1 (up): ip 10.0.0.2 dlci 32(0x20,0x800), dynamic, broadcast,, status defined, active R3#
第五步：测试客户端互通 R2#ping 10.0.0.3 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.0.0.3, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 12/41/104 ms R2#
R3# R3#ping 10.0.0.2 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.0.0.2, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 8/48/96 ms Over
