在R1上的配置
inter s 1/2
 encapsulation frame-relay
 ip address 172.16.1.1 255.255.255.0
 no shut
 frame-relay map ip 172.16.1.3 103
 frame-relay map ip 172.16.1.5 105
 frame-relay interface-dlci 103

在R4（帧中继）上的配置
frame-relay switching
inter s 1/1
 encapsulation frame-relay
 frame-relay intf-type dce
 clock rate 64000
 frame-relay route 301 interface Serial1/2 103
 no shut
inter s 1/0
 encapsulation frame-relay
 frame-relay intf-type dce
 clock rate 64000
 frame-relay route 501 interface Serial1/2 105
 no shut
inter s 1/2
 encapsulation frame-relay
 frame-relay intf-type dce
 clock rate 64000
 frame-relay route 103 interface Serial1/1 301
 frame-relay route 105 interface Serial1/0 501
 no shut

在R3上的配置
inter s 1/1
 encapsulation frame-relay
 ip address 172.16.1.3 255.255.255.0
 no shut
 frame-relay map ip 172.16.1.1 301
 frame-relay interface-dlci 301

在R5上的配置
inter s 1/0
 encapsulation frame-relay
 ip address 172.16.1.5 255.255.255.0
 no shut
 frame-relay map ip 172.16.1.1 501
 frame-relay interface-dlci 501