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2 RIP協(xié)議的基本配置( 三 )


R 172.16.2.0 (.120/21 via 17246.13.1, 00:00:04,Serial0
C 172.16.3.01s directly connected, Ethernet0
R3#trace 172.16.2.2
Type escape sequence to abort.
Tracing the route to 172.16.2.2
1 172.16.13.14 msec 4 msec 8 msec
2 172.16.12.2 16 msec 8 msec*
R3#conft
Enter configuration commands,one per line.End with CNTL/Z.
R3(config)#int s1
R3(ocnfig-if)#no sh
R3(config-if)#exit
R3(config)#logg con
R3(config)#exit
R3#de
01:29:45:%SYS-5CONFIG_I:Configured from console by console
R3:debug ip rip
RIP protocol debugging is on
R3#
01:29:56:RIP:sending v1 update to 255.255.255.255 via Ethernet0(172.16.3.3)
01:29:56:RIP:build update entries
01:29:56: subnet 172.16.1.0 metric 2
01:29:56: subnet 172.16.2.0 metric 2
01:29:56: subnet 172.16.12.0 metric 2
01:29:56: subnet 172.16.13.0 metric 1
01:29:56: subnet 172.16.23.0 metric 1
01:29:56: RIP: sending v1 update to 255.255.255.255 via Serial0 (172.16.13.3)
01:29:56: RIP: build update entries
01:29:56: subnet 172.16.2.0 metric 2
01:29:56: subnet 172.16.3.0 metric 1
01:29:56: subnet 172.16.23.0 metric 1
01:29:56: RIP: sending v1 update to 255.255.255.255 via Serial1 (172.16.23.3)
01:29:56: RIP: build update entries
01:29:56: subnet 172.16.1.0 metric 2
01:29:56: subnet 172.16.3.0 metric 1
01:29:56: subnet 172.16.13.0 metric 1
01:30:00: RIP: received v1 update from 172.16.23.2 on Serial1
01:30:00: 172.16.1.0 in 2 hops
01:30:00: 172.16.2.0 in 1 hops
01:30:00: 172.16.12.0 in 1 hops
R3#
01:30:07: RIP: received v1 update from 172.16.13.1 on Serial0
01:30:07: 172.16.1.0 in 1 hops
01:30:07: 172.16.2.0 in 2 hops
01:30:07: 172.16.12.0 in 1 hops
R3-#indebug all
(1)show ip protocol命令的執(zhí)行結(jié)果中包含了有關(guān)RIP協(xié)議的大量信息,主要有:各種計時器信息;
版本信息,發(fā)送version 1,接收任何version;
各接口的發(fā)送(Send)和接收(Receive)的版本;
自動匯總生效(Automatic network summarization is in effect);
所路由的網(wǎng)絡(luò),172.16.0.0;
路由信息源,即從何處學(xué)月來的路由;
治理距離,缺省值為120 。
(2)用ping和trace命令測試網(wǎng)絡(luò)連通性,尤其是trace命令給出了相應(yīng)的路徑信息 。
(3)我們把R3路由器的S1接口關(guān)閉后,使用show ip route指令查看路由表,顯示到達172.16.2.0的路由己經(jīng)變?yōu)镽1,度量值也變?yōu)?.
trace命令的結(jié)果也顯示了這一變化 。
(4)使用debug ip rip命令可以監(jiān)測到RIP協(xié)議的路由更新發(fā)送和接收情況,在此命令后面的若干行中,可以看出RIP協(xié)議工作的特點,大致有以下幾點:
更新信息缺省情況下向所有參與路由的接口發(fā)送;
RIP版木1的更新包是廣播包,即目的地址為255.255.255.255;
RIP把整個路由表向相鄰路由器發(fā)送;
當(dāng)前所有接口發(fā)送和接收的RIP更新包的版本均為1 。
(5)最后應(yīng)關(guān)閉debug進程 。

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