拓扑如下：
R1模拟帧中继交换机
R3，R2，R4充当DTE设备，并且在R3---S0/1，R2---s0/0,R4---s0/1接口封装帧中继
此试验模拟R2为公司总部，R3，R4为公司分部，实现分公司与总部之间利用帧中继技术的连通
回环接口配置为以后测试在帧中继网络中实现RIP协议
R2配置：
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
ip cef
!
!
!
!
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
interface Loopback0
ip address 2.2.2.2 255.255.255.0回环接口IP地址
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/0
ip address 192.168.1.2 255.255.255.0
encapsulation frame-relay
封装为帧中继（r2(config-if)#encapsulation frame-relay）
ip split-horizon
clock rate 2000000
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/1
no ip address
shutdown
clock rate 2000000
!
!
!
!
ip http server
no ip http secure-server
!
!
!
!
!
!
control-plane
!
!
!
line con 0
logging synchronous
line aux 0
line vty 0 4
login
!
!
end
R3配置：
!
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r3
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
ip cef
!
!
!
!
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
interface Loopback0
ip address 3.3.3.3 255.255.255.0回环接口IP地址
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/0
no ip address
shutdown
clock rate 2000000
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/1
ip address 192.168.1.3 255.255.255.0
encapsulation frame-relay
封装为帧中继（r3(config-if)#encapsulation frame-relay）
clock rate 2000000
!
!
!
!
ip http server
no ip http secure-server
!
!
!
!
!
!
control-plane
!
!
!
line con 0
logging synchronous
line aux 0
line vty 0 4
login
!
!
end
R4配置：
!
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r4
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
ip cef
!
!
!
!
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
interface Loopback0
ip address 4.4.4.4 255.255.255.0
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/0
no ip address
encapsulation frame-relay
shutdown
clock rate 2000000
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/1
ip address 192.168.1.4 255.255.255.0
encapsulation frame-relay
封装为帧中继（r4(config-if)#encapsulation frame-relay）
clock rate 2000000
!
!
!
ip http server
no ip http secure-server
!
!
!
!
!
!
control-plane
!
!
!
line con 0
logging synchronous
line aux 0
line vty 0 4
login
!
!
End
R1配置：（重要）
Router>
Router>enable
Router#config terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname isp
isp(config)#line console 0
isp(config-line)#logging synchronous （日志同步）
isp(config-line)#exit
isp(config)#frame-relay switching （开启帧中继交换功能）
isp(config)#int s0/1
isp(config-if)#encapsulation frame-relay ?（选择封装类型默认为思科帧中继）
MFR Multilink Frame Relay bundle interface
ietf Use RFC1490/RFC2427 encapsulation
isp(config-if)#encapsulation frame-relay
isp(config-if)#clock rate 128000配置时钟速率
isp(config-if)#no shutdown
isp(config-if)#
*Mar 1 00:02:58.131: %LINK-3-UPDOWN: Interface Serial0/1, changed state to up
isp(config-if)#
*Mar 1 00:03:09.135: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1, changed state to up
isp(config-if)#int s0/0
isp(config-if)#encapsulation frame-relay
isp(config-if)#clock rate 128000
isp(config-if)#no shut
*Mar 1 00:03:46.091: %LINK-3-UPDOWN: Interface Serial0/0, changed state to up
isp(config-if)#int s0/2
isp(config-if)#encapsulation frame-relay
isp(config-if)#
*Mar 1 00:03:57.091: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
isp(config-if)#clock rate 128000
isp(config-if)#no shutdown
配置LMI
isp(config-if)#int s0/0
isp(config-if)#frame-relay lmi-type ?
cisco
ansi
q933a
isp(config-if)#frame-relay lmi-type cisco配置LMI类型默认为cisco
isp(config-if)#frame-relay intf-type dce配置为DCE设备
*Mar 1 00:10:00.175: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up
isp(config-if)#int s0/1
isp(config-if)#frame-relay lmi-type cisco
isp(config-if)#frame-relay intf-type dce
isp(config-if)#int s0/2
*Mar 1 00:10:36.175: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1, changed state to up
isp(config-if)#frame-relay lmi-type cisco
isp(config-if)#frame-relay intf-type dce
isp(config-if)#
配置帧中继交换表：
isp(config)#int s0/0
isp(config-if)#frame-relay route 103 interface s0/1 301
告诉路由器如果该接口收到DLCI为103的帧，要从s0/1交换出去，并且将DLCI改为301
isp(config-if)#exit
isp(config)#int s0/1
isp(config-if)#frame-relay route 301 interface s0/0 103
isp(config-if)#frame-relay route 201 interface s0/2 102
isp(config-if)#int s0/2
isp(config-if)#frame-relay route 102 interface s0/1 201
isp#show frame-relay route查看帧中继交换列表
Input Intf Input Dlci Output Intf Output Dlci Status
Serial0/0 103 Serial0/1 301 active
Serial0/1 201 Serial0/2 102 active
Serial0/1 301 Serial0/0 103 active
Serial0/2 102 Serial0/1 201 active
测试连通性：
r2#ping 192.168.1.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/80/264 ms
r2#ping 192.168.1.4
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/88/292 ms
r3#ping 192.168.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/109/364 ms
r4#ping 192.168.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/48/84 ms
技术交流QQ：450120127
如有不足，请留言指正，谢谢