路由器模拟成帧中交换机实现方法及全部配置命令.docx
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路由器模拟成帧中交换机实现方法及全部配置命令.docx
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路由器模拟成帧中交换机实现方法及全部配置命令
路由器模拟成帧中交换机实现方法及全部配置命令
或许你一定在想如何将路由器模拟成帧中交换机,没错,这并不是不能实现,而且你现在一定可以实现,不如赶快来看看吧,不要在煞费苦心的研究了。
Router(config)#frame-relayswitching把路由器模拟成帧中继交换机
Router(config)#inters1/1
Router(config-if)#clockrate128000
Router(config-if)#encapsulationframe-relay配置接口封装帧中继
接口上启用的默认帧中继封装为Cisco封装,如果连接到非思科路由器,要使用itef参数
Router(config-if)#noshu
Router(config)#inters1/2
Router(config-if)#clorate128000
Router(config-if)#encapsulationfr
Router(config-if)#noshu
changedstatetoupnointers1/3
Router(config-if)#clorate128000
Router(config-if)#encapsulationfr
Router(config-if)#noshu
Router(config)#inters1/1
Router(config-if)#frame-relaylmi-typecisco配置LMI类型
Router(config-if)#frame-relayintf-typedce配置接口为帧中继的DCE
Router(config-if)#inters1/2
Router(config-if)#frame-relaylmi-typecisco
Router(config-if)#frame-relayintf-typedce
Router(config-if)#inters1/3
Router(config-if)#frame-relaylmi-typecisco
Router(config-if)#frame-relayintf-typedce
配置路由器两个接口之间的pvc
Router(config)#inters1/1
Router(config-if)#frame-relayroute103inters1/2301
Router(config-if)#frame-relayroute104inters1/3401
Router(config-if)#exit
Router(config)#inters1/2
Router(config-if)#frame-relayroute301inters1/1103
Router(config-if)#frame-relayroute304inters1/3403
Router(config-if)#exit
Router(config)#inters1/3
Router(config-if)#frame-relayroute401inters1/1104
Router(config-if)#frame-relayroute403inters1/2304
Router(config-if)#
Router#showframe-relayroute
InputIntfInputDlciOutputIntfOutputDlciStatus
Serial1/1103Serial1/2301active
Serial1/1104Serial1/3401active
Serial1/2301Serial1/1103active
Serial1/2304Serial1/3403active
Serial1/3401Serial1/1104active
Serial1/3403Serial1/2304active
表明路由器R2上配置3条PVC状态都是活动的
R1的配置
Router(config)#inters1/1
Router(config-if)#ipaddress172.16.134.1255.255.255.0
Router(config-if)#encapsulationfr接口封装帧中继
Router(config-if)#frame-relaylmi-typecisco
Router(config)#interfa0/0
Router(config-if)#ipadd
Router(config-if)#ipaddress192.168.1.1255.255.255.0
Router(config-if)#noshu
如果采用Cisco路由器的IOS是11.2及以后的版本,路由器可以自动协商LMI是类型
所以可以不配
Router(config)#routerrip
Router(config-router)#ver2
Router(config-router)#noauto-summary
Router(config-router)#network172.16.134.0
Router(config-router)#network192.168.1.0
Router(config-router)#exit
R3和R4同R1
ping测试
Router#ping172.16.134.1source192.168.4.1
Typeescapesequencetoabort.
Sending5,100-byteICMPEchosto172.16.134.1,timeoutis2seconds:
Packetsentwithasourceaddressof192.168.4.1
Successrateis100percent(5/5),round-tripmin/avg/max=120/155/200ms
查看帧中继的映射
Router#showframe-relaymap
Serial1/1(up):
ip172.16.134.3dlci103(0x67,0x1870),dynamic,
broadcast,,statusdefined,active
Serial1/1(up):
ip172.16.134.4dlci104(0x68,0x1880),dynamic,
broadcast,,statusdefined,active
以上输出显示了逆向ARP的作用结果表明路由器R1每个封装帧中继的接口都包含2条处于活动状态的DLCI,每条都显示了远程Ip地址与本地的DLCI的映射关系
broadcast“参数允许在PVC上传输广播或组播流量“dynamic表明动态映射
每台路由器都不能ping通自己的串行接口的ip地址,但是可以ping通远程封装帧中继的串行接口的ip地址是因为自己的帧中继映射表中没有自己的接口ip地址和DLCI的映射条目。
逆向ARP做动态映射解决不了该问题,只能通过静态映射解决
Router#showiprouterip
R192.168.4.0/24[120/1]via172.16.134.4,00:
00:
07,Serial1/1
R192.168.3.0/24[120/1]via172.16.134.3,00:
00:
27,Serial1/1
Router#showiprouterip
R192.168.4.0/24[120/1]via172.16.134.4,00:
00:
00,Serial1/2
R192.168.1.0/24[120/1]via172.16.134.1,00:
00:
05,Serial1/2
Router#showiprouterip
R192.168.1.0/24[120/1]via172.16.134.1,00:
00:
18,Serial1/3
R192.168.3.0/24[120/1]via172.16.134.3,00:
00:
27,Serial1/3
在本实验中,帧中继交换机在路由器R2上采用了PVC全互连的拓扑结构
但是在实际应用中,为了节省费用,一般采用(中心--分支)的拓扑结构
即只有分支到中心的PVC,假如R1是中心路由R2和R3是分支路由
在R2上是配置如下
Router(config)#inters1/2
Router(config-if)#noframe-relayroute304interfaces1/3403
Router(config-if)#inters1/3
Router(config-if)#noframe-relayroute403interfaces1/2304
在R3和R4上
Router#showframe-relaymap
Serial1/2(up):
ip172.16.134.1dlci301(0x12D,0x48D0),dynamic,
broadcast,,statusdefined,active
Router#showframe-relaymap
Serial1/3(up):
ip172.16.134.1dlci401(0x191,0x6410),dynamic,
broadcast,,statusdefined,active
可以看到R3和R4上只有一条到中心站点路由器R1的映射
R4和R3的网络不可达
R1
配置帧中继的静态映射
Router(config)#inters1/1
Router(config-if)#noframe-relayinverse-arp
关闭逆向ARP,默认是开启的
Router(config-if)#frame-relaymapip172.16.134.3103broadcast
配置帧中继静态映射
Router(config-if)#frame-relaymapip172.16.134.4104broadcast
Router(config-if)#frame-relaymapip172.16.134.1104broadcast
配置自己接口的ip地址的映射,目的是允许ping路由器该接口的ip地址
R3
Router(config)#inters1/2
Router(config-if)#noframe-relayinverse-arp
Router(config-if)#frame-relaymapip172.16.134.1301broadcast
Router(config-if)#frame-relaymapip172.16.134.4304broadcast
Router(config-if)#frame-relaymapip172.16.134.3301broadcast
R4
Router(config)#inters1/3
Router(config-if)#noframe-relayinverse-arp
Router(config-if)#frame-relaymapip172.16.134.1401broadcast
Router(config-if)#frame-relaymapip172.16.134.3403broadcast
Router(config-if)#frame-relaymapip172.16.134.4401broadcast
R1#showframe-relaymap
Serial1/1(up):
ip172.16.134.1dlci104(0x68,0x1880),static,
broadcast,
CISCO,statusdefined,active
Serial1/1(up):
ip172.16.134.3dlci103(0x67,0x1870),static,
broadcast,
CISCO,statusdefined,active
Serial1/1(up):
ip172.16.134.4dlci104(0x68,0x1880),static,
broadcast,
CISCO,statusdefined,active
R3#showframe-relaymap
Serial1/2(up):
ip172.16.134.1dlci301(0x12D,0x48D0),static,
broadcast,
CISCO,statusdefined,active
Serial1/2(up):
ip172.16.134.3dlci301(0x12D,0x48D0),static,
broadcast,
CISCO,statusdefined,active
Serial1/2(up):
ip172.16.134.4dlci301(0x12D,0x48D0),static,
broadcast,
CISCO,statusdefined,active
R4#showframe-relaymap
Serial1/3(up):
ip172.16.134.1dlci401(0x191,0x6410),static,
broadcast,
CISCO,statusdefined,active
Serial1/3(up):
ip172.16.134.3dlci401(0x191,0x6410),static,
broadcast,
CISCO,statusdefined,active
Serial1/3(up):
ip172.16.134.4dlci401(0x191,0x6410),static,
broadcast,
CISCO,statusdefined,active
封装帧中继每个接口都采用了静态映射
R1#showiprouterip
R192.168.4.0/24[120/1]via172.16.134.4,00:
00:
26,Serial1/1
R192.168.3.0/24[120/1]via172.16.134.3,00:
00:
07,Serial1/1
R1#showipinterfaces1/1
Serial1/1isup,lineprotocolisup
Internetaddressis172.16.134.1/24
Broadcastaddressis255.255.255.255
Splithorizonisdisabled接口封装帧中继后,水平分割被自动关闭
R1(R1(config)#inters1/1
R1(config-if)#ipsplit-horizon开启水平分割
R1#cleariproute*清除路由表
R1#showiprouterip
R192.168.4.0/24[120/1]via172.16.134.4,00:
00:
07,Serial1/1
R192.168.3.0/24[120/1]via172.16.134.3,00:
00:
11,Serial1/1
重新获得
R3#showiprouterip
R192.168.1.0/24[120/1]via172.16.134.1,00:
00:
15,Serial1/2
R4#showiprouterip
R192.168.1.0/24[120/1]via172.16.134.1,00:
00:
06,Serial1/3
R3没有了R4的路由
R4没有了R3的路由
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- 路由器 模拟 成帧中 交换机 实现 方法 全部 配置 命令