4.7 Frame-Relay&Static Route
实验目的:
1、掌握帧中继上部署静态路由技术。
2、通过静态路由实现不同分支之间的通信。
实验拓扑:
实验步骤:
1、依据图中拓扑,通过路由器模拟帧中继交换机,配置如下:
①开启帧中继交换功能
FW-SW(config)#frame-relay switching
②接口开启帧中继封装,并定义为DCE接口
FW-SW(config)#int s0/0
FW-SW(config-if)#no shutdown
FW-SW(config-if)#encapsulation frame-relay
FW-SW(config-if)#frame-relay intf-type dce
FW-SW(config-if)#exit
FW-SW(config)#int s0/1
FW-SW(config-if)#no shutdown
FW-SW(config-if)#encapsulation frame-relay
FW-SW(config-if)#frame-relay intf-type dce
FW-SW(config-if)#exit
FW-SW(config)#int s0/2
FW-SW(config-if)#no shutdown
FW-SW(config-if)#encapsulation frame-relay
FW-SW(config-if)#frame-relay intf-type dce
FW-SW(config-if)#exit
③编写帧中继转发条目
FW-SW(config)#int s0/0
FW-SW(config-if)#frame-relay route 102 interface s0/1 201
FW-SW(config-if)#frame-relay route 201 interface s0/0 102
FW-SW(config-if)#exit
FW-SW(config)#int s0/1
FW-SW(config-if)#frame-relay route 201 interface s0/0 102
FW-SW(config-if)#exit
FW-SW(config)#int s0/2
FW-SW(config-if)#frame-relay route 301 interface s0/0 102
FW-SW(config-if)#exit
2、通过部署帧中继技术,使得各个站点直连连通,其中R1为中心点,R2和R3为分支点,配置如下:
R1上
R1(config)#int s0/0
R1(config-if)#no shutdown
R1(config-if)#encapsulation frame-relay
R1(config-if)#no frame-relay inverse-arp
R1(config-if)#frame-relay map ip 192.168.1.2 102 broadcast
R1(config-if)#frame-relay map ip 192.168.1.3 103 broadcast
R1(config-if)#exit
R2上
R2(config)#int s0/0
R2(config-if)#no shutdown
R2(config-if)#encapsulation frame-relay
R2(config-if)#no frame-relay inverse-arp
R2(config-if)#frame-relay map ip 192.168.1.1 201 broadcast
R2(config-if)#frame-relay map ip 192.168.1.3 201 broadcast
R2(config-if)#exit
R3上
R3(config)#int s0/0
R3(config-if)#no shutdown
R3(config-if)#encapsulation frame-relay
R3(config-if)#no frame-relay inverse-arp
R3(config-if)#frame-relay map ip 192.168.1.1 301 broadcast
R3(config-if)#frame-relay map ip 192.168.1.2 301 broadcast
R3(config-if)#exit
测试直连连通性,如下:
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 = 36/42/60 ms
R1#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 = 16/31/52 ms
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 = 44/68/96 ms
可以看到,直连连通没有问题。
3、部署静态路由技术,使得不同分支之间能够相互通信,配置如下:
R1(config)#ip route 2.2.2.2 255.255.255.255 192.168.1.2[PL1]
R1(config)#ip route 3.3.3.3 255.255.255.255 192.168.1.3
R2(config)#ip route 1.1.1.1 255.255.255.255 192.168.1.1
R2(config)#ip route 3.3.3.3 255.255.255.255 192.168.1.3
R3(config)#ip route 1.1.1.1 255.255.255.255 192.168.1.1
R3(config)#ip route 2.2.2.2 255.255.255.255 192.168.1.2
此时测试不同分支背后网段能否相互通信,如下:
R1#ping 2.2.2.2 source 1.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
Packet sent with a source address of 1.1.1.1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 24/45/64 ms
R1#ping 3.3.3.3 source 1.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
Packet sent with a source address of 1.1.1.1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 40/42/52 ms
R2#ping 3.3.3.3 source 2.2.2.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
Packet sent with a source address of 2.2.2.2
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 48/59/80 ms
测试成功,此实验完成。
[PL1]帧中继环境下,静态路由写法需要采用下一跳。如果采用出接口写法,则无法找到映射信息,封装失败,导致通信失败,若采用下一跳,则经过路由递归后可以找到映射信息。一般在点对点环境下静态路由采用出接口写法,在多路访问环境下采用下一跳写法。
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