GNS3 做帧中继实验
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GNS3 做帧中继实验
1 实验拓扑(用帧中继交换机做)
注:在R1上左右两个子接口是s1/0.1 (用于point-point)、s1/0.2(用于point-multipoint)
注:映射关系系写完后,千万记得点一下右下方的Apply或OK,不然的话即使你路由器
配置正确,但protocol也会一直显示down,有时会让你急的蛋疼。
2 配置
(point-point)
R1>en
R1#conf t
R1(config)#int s1/0
R1(config-if)#encapsulation frame-relay
R1(config-if)#no frame-relay inverse-arp //关闭逆向arp(动态map映射),如果不关闭将有可
能学到错误的映射,开启的条件是,
是帧中继交换机有全互联的dlci映射R1(config-if)#no arp frame-relay//阻止arp 请求
R1(config-if)#no shut
R1(config-if)#exit
R1(config)#int s1/0.1 point-to-point
R1(config-subif)#ip addr 200.1.1.1 255.255.255.0
R1(config-subif)#frame-relay interface-dlci 101 //只有子接口封装了point-to-point 是才可
用这条命令,负责使用frame-relay map ip 目的ip 自己的dlci值
R2:
R2(config)#int s1/0
R2(config-if)#encapsulation frame-relay
R2(config-if)#no frame-relay inverse-arp
R2(config-if)#no arp frame-relay
R2(config-if)#ip addr 200.1.1.2 255.255.255.0
R2(config-if)#frame-relay map ip 200.1.1.1 202 b
(point-to-multipoint)
R1:
R1#conf t
R1(config)#int s1/0.2 multipoint
R1(config-subif)#ip addr 201.1.1.1 255.255.255.0
R1(config-subif)#frame-relay map ip 201.1.1.2 102 broadcast
R1(config-subif)#frame-relay map ip 201.1.1.3 103 broadcast
R1(config-subif)#^Z
R3:
R3>en
R3#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R3(config)#int s1/0
R3(config-if)#en
R3(config-if)#encapsulation frame-relay
R3(config-if)#no arp frame-relay
R3(config-if)#no frame-relay inverse-arp
R3(config-if)#ip addr 201.1.1.2 255.255.255.0
R3(config-if)#no shut
R3(config-if)#frame-relay map ip 201.1.1.1 203 broadcast
R4:
R4>en
R4#conf t
R4(config)#int s1/0
R4(config-if)#encapsulation frame-relay
R4(config-if)#no arp frame-relay
R4(config-if)#no frame-relay inverse-arp
R4(config-if)#ip addr 201.1.1.3 255.255.255.0
R4(config-if)#frame-relay map ip 201.1.1.1 204 broadcast
R4(config-if)#no shu
结果测试:
R1#show frame-relay map
Serial1/0.2 (up): ip 201.1.1.2 dlci 102(0x66,0x1860), static,
broadcast,
CISCO, status defined, active
Serial1/0.2 (up): ip 201.1.1.3 dlci 103(0x67,0x1870), static,
broadcast,
CISCO, status defined, active
Serial1/0.1 (up): point-to-point dlci, dlci 101(0x65,0x1850), broadcast
status defined, active
R1#show ip int b
Interface IP-Address OK? Method Status Protocol FastEthernet0/0 unassigned YES unset administratively down down Serial1/0 unassigned YES unset up up Serial1/0.1 200.1.1.1 YES manual up up Serial1/0.2 201.1.1.1 YES manual up up Serial1/1 unassigned YES unset administratively down down Serial1/2 unassigned YES unset administratively down down
R1#ping 200.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 200.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/64/156 ms
R1#ping 201.1.1.2