广域网技术<帧中继简配>

实验拓朴:

 

 

 

实验目的:

 

1. 按照实验要求连接拓扑

2. 配置ROUTER2为帧中继交换机、并配置帧中继路由

3. 配置ROUTER1、ROUTER3帧中继映射

4. 测试联通性

 

实验环境描述:

 

通过对R2进行中继配置,使R1和R3之间能够互通.

 

 

实验步骤:

 

目的1:搭建实验环境.

 

Router1 S0/0 <----> Router2 S0/0
Router2 S0/1 <----> Router3 S0/0

 

目的2:配置ROUTER2为帧中继交换机、并配置帧中继路由.

 

1．r2(config)#no ip routing                                  （关闭路由）

r2(config)#frame-relay switching                         （启用帧中继交换）

r2(config)#in s0/0
r2(config-if)#encapsulation frame-relay              （接口封装为帧中继）
r2(config-if)#frame-relay intf-type dce                 （接口配置成DCE终端）
r2(config-if)#clock rate 64000                               （DCE同步时钟）
r2(config-if)#no sh
r2(config-if)#exit
    
r2(config)#in s0/1
r2(config-if)#encapsulation frame-relay
r2(config-if)#frame-relay intf-type dce
r2(config-if)#clock rate 64000
r2(config-if)#no sh
r2(config-if)#exit

 

r2(config)#in s0/0
r2(config-if)#frame-relay route 102 interface s0/1 201              （配置帧中继路由）
r2(config-if)#no sh
r2(config-if)#exit

 

r2(config)#in s0/1
r2(config-if)#frame-relay route 201 interface s0/0 102              （配置帧中继路由）
r2(config-if)#no sh
r2(config-if)#exit

r2#show frame-relay route                                      （测试）
Input Intf      Input Dlci      Output Intf     Output Dlci     Status
Serial0/0       102             Serial0/1       201             inactive
Serial0/1       201             Serial0/0       102             inactive

 

r2#show ip in br                                               （测试）
Interface                  IP-Address      OK? Method Status                Protocol
Serial0/0                  unassigned      YES unset  up                    down   
Serial0/1                  unassigned      YES unset  up                    down   
Serial0/2                  unassigned      YES unset  administratively down down   
Serial0/3                  unassigned      YES unset  administratively down down 

 

 

目的3:配置ROUTER1.ROUTER2的帧中继映射.

 

1．r1(config)#in s0/0
r1(config-if)#encapsulation frame-relay
r1(config-if)#no frame-relay inverse-arp                            (关掉反向ARP)
r1(config-if)#ip add 192.168.1.1 255.255.255.0
r1(config-if)#frame-relay map ip 192.168.1.2 102 broadcast            （帧中继映射）
r1(config-if)#no sh
r1(config-if)#exit

 

r1#show ip in br
Interface                  IP-Address      OK? Method Status                Protocol
Serial0/0                  192.168.1.1     YES manual up                    up     
Serial0/1                  unassigned      YES unset  administratively down down   
Serial0/2                  unassigned      YES unset  administratively down down   
Serial0/3                  unassigned      YES unset  administratively down down   
r1#
*Mar  1 00:22:47.223: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up

r1#show frame-relay map
Serial0/0 (up): ip 192.168.1.2 dlci 102(0x66,0x1860), static,
              broadcast,
              CISCO, status defined, inactive

 

3．r3(config)#in s0/0
r3(config-if)#encapsulation frame-relay
r3(config-if)#no frame-relay inverse-arp
r3(config-if)#ip add 192.168.1.2 255.255.255.0
r3(config-if)#frame-relay map ip 192.168.1.1 201 broadcast
r3(config-if)#no sh
r3(config-if)#exit
r3(config)#exit

 

r3#show ip in br
Interface                  IP-Address      OK? Method Status                Protocol
Serial0/0                  192.168.1.2     YES manual up                   up  
Serial0/1                  unassigned      YES unset  administratively down down   
Serial0/2                  unassigned      YES unset  administratively down down   
Serial0/3                  unassigned      YES unset  administratively down down   

 

r3#show frame-relay map

Serial0/0 (up): ip 192.168.1.1 dlci 201(0xC9,0x3090), static,
              broadcast,
              CISCO, status defined, active

 

r1#show frame-relay map

Serial0/0 (up): ip 192.168.1.2 dlci 102(0x66,0x1860), static,
              broadcast,
              CISCO, status defined, active

 

目的4:测试ROUTER1. ROUTER2之间的互通性.

 

  r1#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 = 44/96/184 ms

r1#ping 192.168.1.1                         （本身不通）

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

r3#ping 192.168.1.1   

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 60/104/172 ms

r3#ping 192.168.1.2                         （本身不通）

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

注意：本身不通是因为没有做通向本身的帧中继映射。

 

目标5:解决上面不通的问题.

 

  1.r1(config)#in s0/0
r1(config-if)#frame-relay map ip 192.168.1.1 102 broadcast     （通向本身的帧中继映射）
r1(config-if)#no sh
r1(config-if)#exit

r1#ping 192.168.1.1                             （ 通了）

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 128/202/264 ms
r1#

r3(config)#in s0/0
r3(config-if)#frame-relay map ip 192.168.1.2 201 broadcast （通向本身的帧中继映射）
r3(config-if)#no sh       
r3(config-if)#exit
r3(config)#exit

 

r3#ping 192.168.1.2                                   （ 通了）
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 = 108/146/264 ms

 

 

测试OK!

 

 

 

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