实验要求：R1、R2、R3运行RIPv1并宣告自身回环地址，使所有路由器学习到其他回环地址。
R1#
interface Loopback0
ip address 1.1.1.1 255.255.255.0
interface Serial1/1
ip address 192.168.1.1 255.255.255.0
encapsulation frame-relay
frame-relay map ip 192.168.1.3 103 broadcast
参数broadcast即在该接口上发送广播信息，RIPv1使用广播（255.255.255.255）更新路由表，如在此不加参数broadcast，也可在RIP进程下执行手工指定邻居关系： neighbor 192.168.1.2（邻居地址）。
frame-relay map ip 192.168.1.2 102 broadcast
frame-relay lmi-type cisco
no shutdown
router rip
network 1.0.0.0
network 192.168.1.0
R2#
interface Loopback0
ip address 2.2.2.2 255.255.255.0
interface Serial1/2
ip address 192.168.1.2 255.255.255.0
encapsulation frame-relay
serial restart-delay 0
frame-relay map ip 192.168.1.3 203 broadcast
frame-relay map ip 192.168.1.1 201 broadcast
frame-relay lmi-type cisco
no shutdown
router rip
network 2.0.0.0
network 192.168.1.0
R3#
interface Loopback0
ip address 3.3.3.3 255.255.255.0
interface Serial1/3
ip address 192.168.1.3 255.255.255.0
encapsulation frame-relay
serial restart-delay 0
frame-relay map ip 192.168.1.2 302 broadcast
frame-relay map ip 192.168.1.1 301 broadcast
frame-relay lmi-type cisco
no shutdown
router rip
network 3.0.0.0
network 192.168.1.0
实验结果：
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