RIP路由协议分析

在刚启动的时候,RIP 从启用了RIP 的接口上向外广播请求信息,接下来RIP 进程进入一个循环状态:监听来自其
他路由器的请求信息和应答信息.当邻居收到请求信息以后,就发送应答信息给这个发出请求信息的路由器,这个应
答信息就包罗了它们的路由表。
RIP 定义了2 种信息类型:
Request message(请求信息):用来向邻居请求发送一个update(更新),
Response message(应答信息):运载着这个被请求的update.

RIPv1为有类路由,发送更新不包括掩码,通过广播255.255.255.255发送更新
RIPv2为无类路由,发送更新包括掩码,tag,通过组播224.0.0.9发送更新

为了防止更新同步,RIP 会以 15%的误差发送更新,即实际发送更新的周期的范围是

25.5-30 秒。

如下拓扑:

RIP路由协议分析_第1张图片

根据以上拓扑配置RIPv1协议:

连同后,开始试验:

分析1.RIP的工作周期 2.工作的工程

在R6上:

R6#debug ip rip

RIP protocol debugging is on

R6#

Feb 25 22:18:22.987: RIP: sending v1 update to 255.255.255.255 via FastEthernet2/0 (192.168.1.1)

Feb 25 22:18:22.987: RIP: build update entries

Feb 25 22:18:22.987: network 192.168.2.0 metric 1

Feb 25 22:18:22.987: network 192.168.3.0 metric 2

Feb 25 22:18:23.007: RIP: sending v1 update to 255.255.255.255 via Serial1/2 (192.168.2.1)

Feb 25 22:18:23.007: RIP: build update entries

Feb 25 22:18:23.007: network 192.168.1.0 metric 1

Feb 25 22:18:29.747: RIP: ignored v1 update from bad source 192.168.3.1 on FastEthernet2/0

Feb 25 22:18:29.963: RIP: received v1 update from 192.168.2.2 on Serial1/2

Feb 25 22:18:29.963: 192.168.3.0 in 1 hops

Feb 25 22:18:29.963: RIP-DB: network_update with 192.168.3.0/24 succeeds

Feb 25 22:18:29.963: RIP-DB: adding 192.168.3.0/0 (metric 1) via 192.168.2.2 on Serial1/2 to RIP database

Feb 25 22:18:49.439: RIP: sending v1 update to 255.255.255.255 via FastEthernet2/0 (192.168.1.1)

Feb 25 22:18:49.439: RIP: build update entries

Feb 25 22:18:49.439: network 192.168.2.0 metric 1

Feb 25 22:18:49.439: network 192.168.3.0 metric 2

Feb 25 22:18:51.159: RIP: sending v1 update to 255.255.255.255 via Serial1/2 (192.168.2.1)

Feb 25 22:18:51.159: RIP: build update entries

Feb 25 22:18:51.159: network 192.168.1.0 metric 1

Feb 25 22:18:56.631: RIP: ignored v1 update from bad source 192.168.3.1 on FastEthernet2/0

Feb 25 22:18:59.043: RIP: received v1 update from 192.168.2.2 on Serial1/2

Feb 25 22:18:59.043: 192.168.3.0 in 1 hops

Feb 25 22:18:59.043: RIP-DB: network_update with 192.168.3.0/24 succeeds

Feb 25 22:18:59.043: RIP-DB: adding 192.168.3.0/0 (metric 1) via 192.168.2.2 on Serial1/2 to RIP database

Feb 25 22:19:16.083: RIP: sending v1 update to 255.255.255.255 via FastEthernet2/0 (192.168.1.1)

Feb 25 22:19:16.083: RIP: build update entries

Feb 25 22:19:16.083: network 192.168.2.0 metric 1

Feb 25 22:19:16.083: network 192.168.3.0 metric 2

R7:

R7#debug ip rip

RIP protocol debugging is on

R7#

R7#

R7#

R7#

Feb 25 22:18:22.463: RIP: ignored v1 update from bad source 192.168.1.1 on FastEthernet2/0

Feb 25 22:18:22.483: RIP: received v1 update from 192.168.2.1 on Serial1/5

Feb 25 22:18:22.483: 192.168.1.0 in 1 hops

Feb 25 22:18:29.219: RIP: sending v1 update to 255.255.255.255 via FastEthernet2/0 (192.168.3.1)

Feb 25 22:18:29.219: RIP: build update entries

Feb 25 22:18:29.219: network 192.168.1.0 metric 2

Feb 25 22:18:29.219: network 192.168.2.0 metric 1

Feb 25 22:18:29.455: RIP: sending v1 update to 255.255.255.255 via Serial1/5 (192.168.2.2)

Feb 25 22:18:29.455: RIP: build update entries

Feb 25 22:18:29.455: network 192.168.3.0 metric 1

Feb 25 22:18:48.855: RIP: ignored v1 update from bad source 192.168.1.1 on FastEthernet2/0

Feb 25 22:18:50.559: RIP: received v1 update from 192.168.2.1 on Serial1/5

Feb 25 22:18:50.559: 192.168.1.0 in 1 hops

Feb 25 22:18:55.951: RIP: sending v1 update to 255.255.255.255 via FastEthernet2/0 (192.168.3.1)

Feb 25 22:18:55.951: RIP: build update entries

Feb 25 22:18:55.951: network 192.168.1.0 metric 2

Feb 25 22:18:55.951: network 192.168.2.0 metric 1

Feb 25 22:18:58.351: RIP: sending v1 update to 255.255.255.255 via Serial1/5 (192.168.2.2)

Feb 25 22:18:58.351: RIP: build update entries

Feb 25 22:18:58.351: network 192.168.3.0 metric 1

Feb 25 22:19:15.315: RIP: ignored v1 update from bad source 192.168.1.1 on FastEthernet2/0

Feb 25 22:19:19.719: RIP: received v1 update from 192.168.2.1 on Serial1/5

Feb 25 22:19:19.719: 192.168.1.0 in 1 hops

Feb 25 22:19:23.671: RIP: sending v1 update to 255.255.255.255 via FastEthernet2/0 (192.168.3.1)

Feb 25 22:19:23.671: RIP: build update entries

Feb 25 22:19:23.671: network 192.168.1.0 metric 2

Feb 25 22:19:23.671: network 192.168.2.0 metric 1

Feb 25 22:19:27.835: RIP: sending v1 update to 255.255.255.255 via Serial1/5 (192.168.2.2)

Feb 25 22:19:27.835: RIP: build update entries

Feb 25 22:19:27.835: network 192.168.3.0 metric 1

计算机A上一直ping测试计算机B:

Reply from 192.168.3.2: bytes=32 time=177ms TTL=126

Reply from 192.168.3.2: bytes=32 time=126ms TTL=126

Reply from 192.168.3.2: bytes=32 time=171ms TTL=126

Reply from 192.168.3.2: bytes=32 time=175ms TTL=126

Reply from 192.168.3.2: bytes=32 time=159ms TTL=126

Reply from 192.168.3.2: bytes=32 time=249ms TTL=126

Reply from 192.168.3.2: bytes=32 time=233ms TTL=126

Reply from 192.168.3.2: bytes=32 time=136ms TTL=126

Reply from 192.168.3.2: bytes=32 time=185ms TTL=126

Reply from 192.168.3.2: bytes=32 time=198ms TTL=126

Reply from 192.168.3.2: bytes=32 time=120ms TTL=126

Reply from 192.168.3.2: bytes=32 time=171ms TTL=126

Reply from 192.168.3.2: bytes=32 time=138ms TTL=126

在R6上,修改协议的版本:

R6>

R6>enable

R6#config t

Enter configuration commands, one per line. End with CNTL/Z.

R6(config)#router rip

R6(config-router)#version 2

R6(config-router)#end

R6#

在R6上分析:

R6#debug ip rip

RIP protocol debugging is on

R6#

Feb 25 22:19:52.867: %SYS-5-CONFIG_I: Configured from console by console

Feb 25 22:19:56.743: RIP: ignored v1 packet from 192.168.2.2 (illegal version) ignored―被忽略 illegal:非法

Feb 25 22:20:11.223: RIP: sending v2 update to 224.0.0.9 via FastEthernet2/0 (192.168.1.1) 该路由RIP协议版本为2,所有接口都发

Feb 25 22:20:11.223: RIP: build update entries

Feb 25 22:20:11.223: 192.168.2.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:20:11.223: 192.168.3.0/24 via 0.0.0.0, metric 2, tag 0

Feb 25 22:20:20.419: RIP: sending v2 update to 224.0.0.9 via Serial1/2 (192.168.2.1)

Feb 25 22:20:20.419: RIP: build update entries

Feb 25 22:20:20.419: 192.168.1.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:20:22.291: RIP: ignored v1 packet from 192.168.3.1 (illegal version)

Feb 25 22:20:24.167: RIP: ignored v1 packet from 192.168.2.2 (illegal version)

Feb 25 22:20:38.207: RIP: sending v2 update to 224.0.0.9 via FastEthernet2/0 (192.168.1.1)

Feb 25 22:20:38.207: RIP: build update entries

Feb 25 22:20:38.207: 192.168.2.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:20:38.207: 192.168.3.0/24 via 0.0.0.0, metric 2, tag 0

Feb 25 22:20:47.655: RIP: sending v2 update to 224.0.0.9 via Serial1/2 (192.168.2.1)

Feb 25 22:20:47.655: RIP: build update entries

Feb 25 22:20:47.655: 192.168.1.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:20:49.199: RIP: ignored v1 packet from 192.168.3.1 (illegal version)

Feb 25 22:20:51.895: RIP: ignored v1 packet from 192.168.2.2 (illegal version)

在R7上:

R7#debug ip rip

RIP protocol debugging is on

R7#

Feb 25 22:20:00.703: %SYS-5-CONFIG_I: Configured from console by console

Feb 25 22:20:10.043: RIP: ignored v2 update from bad source 192.168.1.1 on FastEthernet2/0

Feb 25 22:20:19.187: RIP: received v2 update from 192.168.2.1 on Serial1/5

Feb 25 22:20:19.187: 192.168.1.0/24 via 0.0.0.0 in 1 hops

Feb 25 22:20:21.039: RIP: sending v1 update to 255.255.255.255 via FastEthernet2/0 (192.168.3.1)

Feb 25 22:20:21.039: RIP: build update entries

Feb 25 22:20:21.039: network 192.168.1.0 metric 2

Feb 25 22:20:21.039: network 192.168.2.0 metric 1

Feb 25 22:20:22.907: RIP: sending v1 update to 255.255.255.255 via Serial1/5 (192.168.2.2)

Feb 25 22:20:22.907: RIP: build update entries

Feb 25 22:20:22.907: network 192.168.3.0 metric 1

Feb 25 22:20:36.955: RIP: ignored v2 update from bad source 192.168.1.1 on FastEthernet2/0

Feb 25 22:20:46.359: RIP: received v2 update from 192.168.2.1 on Serial1/5

Feb 25 22:20:46.359: 192.168.1.0/24 via 0.0.0.0 in 1 hops

Feb 25 22:20:47.891: RIP: sending v1 update to 255.255.255.255 via FastEthernet2/0 (192.168.3.1)

Feb 25 22:20:47.891: RIP: build update entries

Feb 25 22:20:47.891: network 192.168.1.0 metric 2

Feb 25 22:20:47.891: network 192.168.2.0 metric 1

Feb 25 22:20:50.575: RIP: sending v1 update to 255.255.255.255 via Serial1/5 (192.168.2.2)

Feb 25 22:20:50.575: RIP: build update entries

Feb 25 22:20:50.575: network 192.168.3.0 metric 1

Feb 25 22:21:06.283: RIP: ignored v2 update from bad source 192.168.1.1 on FastEthernet2/0

计算机A上:

Request timed out.

Request timed out.

Request timed out.

Request timed out.

Request timed out.

Request timed out.

Request timed out.

Request timed out.

Request timed out.

Request timed out.

Request timed out.

Request timed out.

Request timed out.

Request timed out.

Reply from 192.168.1.1: Destination host unreachable.

Request timed out.

Reply from 192.168.1.1: Destination host unreachable.

Request timed out.

Reply from 192.168.1.1: Destination host unreachable.

Request timed out.

Reply from 192.168.1.1: Destination host unreachable.

Request timed out.

Reply from 192.168.1.1: Destination host unreachable. 没有路由

Request timed out.

网络已经无法连同了。

在R7上也修改RIP版本 RIPv2

在R6上查看:

R6#

Feb 25 22:22:05.567: RIP: sending v2 update to 224.0.0.9 via FastEthernet2/0 (192.168.1.1)

Feb 25 22:22:05.567: RIP: build update entries

Feb 25 22:22:05.567: 192.168.2.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:22:05.567: 192.168.3.0/24 via 0.0.0.0, metric 2, tag 0

Feb 25 22:22:10.783: RIP: sending v2 update to 224.0.0.9 via Serial1/2 (192.168.2.1)

Feb 25 22:22:10.783: RIP: build update entries

Feb 25 22:22:10.783: 192.168.1.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:22:12.499: RIP: ignored v2 update from bad source 192.168.3.1 on FastEthernet2/0

Feb 25 22:22:16.831: RIP: received v2 update from 192.168.2.2 on Serial1/2

Feb 25 22:22:16.831: 192.168.3.0/24 via 0.0.0.0 in 1 hops

Feb 25 22:22:34.759: RIP: sending v2 update to 224.0.0.9 via FastEthernet2/0 (192.168.1.1)

Feb 25 22:22:34.759: RIP: build update entries

Feb 25 22:22:34.759: 192.168.2.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:22:34.759: 192.168.3.0/24 via 0.0.0.0, metric 2, tag 0

Feb 25 22:22:39.467: RIP: ignored v2 update from bad source 192.168.3.1 on FastEthernet2/0

Feb 25 22:22:40.247: RIP: sending v2 update to 224.0.0.9 via Serial1/2 (192.168.2.1)

Feb 25 22:22:40.247: RIP: build update entries

Feb 25 22:22:40.247: 192.168.1.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:22:44.611: RIP: received v2 update from 192.168.2.2 on Serial1/2

Feb 25 22:22:44.611: 192.168.3.0/24 via 0.0.0.0 in 1 hops

Feb 25 22:23:02.463: RIP: sending v2 update to 224.0.0.9 via FastEthernet2/0 (192.168.1.1)

Feb 25 22:23:02.463: RIP: build update entries

Feb 25 22:23:02.463: 192.168.2.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:23:02.463: 192.168.3.0/24 via 0.0.0.0, metric 2, tag 0

Feb 25 22:23:07.435: RIP: ignored v2 update from bad source 192.168.3.1 on FastEthernet2/0

Feb 25 22:23:09.027: RIP: sending v2 update to 224.0.0.9 via Serial1/2 (192.168.2.1)

Feb 25 22:23:09.027: RIP: build update entries

Feb 25 22:23:09.027: 192.168.1.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:23:13.387: RIP: received v2 update from 192.168.2.2 on Serial1/2

Feb 25 22:23:13.387: 192.168.3.0/24 via 0.0.0.0 in 1 hops

Feb 25 22:23:31.331: RIP: sending v2 update to 224.0.0.9 via FastEthernet2/0 (192.168.1.1)

Feb 25 22:23:31.331: RIP: build update entries

Feb 25 22:23:31.331: 192.168.2.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:23:31.331: 192.168.3.0/24 via 0.0.0.0, metric 2, tag 0

Feb 25 22:23:34.543: RIP: ignored v2 update from bad source 192.168.3.1 on FastEthernet2/0

Feb 25 22:23:35.079: RIP: sending v2 update to 224.0.0.9 via Serial1/2 (192.168.2.1)

Feb 25 22:23:35.079: RIP: build update entries

Feb 25 22:23:35.079: 192.168.1.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:23:41.307: RIP: received v2 update from 192.168.2.2 on Serial1/2

Feb 25 22:23:41.307: 192.168.3.0/24 via 0.0.0.0 in 1 hops

Feb 25 22:23:58.511: RIP: sending v2 update to 224.0.0.9 via FastEthernet2/0 (192.168.1.1)

Feb 25 22:23:58.511: RIP: build update entries

Feb 25 22:23:58.511: 192.168.2.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:23:58.511: 192.168.3.0/24 via 0.0.0.0, metric 2, tag 0

Feb 25 22:24:01.523: RIP: sending v2 update to 224.0.0.9 via Serial1/2 (192.168.2.1)

Feb 25 22:24:01.523: RIP: build update entries

Feb 25 22:24:01.523: 192.168.1.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:24:02.079: RIP: ignored v2 update from bad source 192.168.3.1 on FastEthernet2/0

Feb 25 22:24:10.759: RIP: received v2 update from 192.168.2.2 on Serial1/2

Feb 25 22:24:10.759: 192.168.3.0/24 via 0.0.0.0 in 1 hops

Feb 25 22:24:26.999: RIP: sending v2 update to 224.0.0.9 via FastEthernet2/0 (192.168.1.1)

Feb 25 22:24:26.999: RIP: build update entries

Feb 25 22:24:26.999: 192.168.2.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:24:26.999: 192.168.3.0/24 via 0.0.0.0, metric 2, tag 0

Feb 25 22:24:27.807: RIP: sending v2 update to 224.0.0.9 via Serial1/2 (192.168.2.1)

Feb 25 22:24:27.807: RIP: build update entries

Feb 25 22:24:27.807: 192.168.1.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:24:28.275: RIP: ignored v2 update from bad source 192.168.3.1 on FastEthernet2/0

Feb 25 22:24:39.647: RIP: received v2 update from 192.168.2.2 on Serial1/2

Feb 25 22:24:39.647: 192.168.3.0/24 via 0.0.0.0 in 1 hops

R6#

在R7上查看:

R7#

Feb 25 22:22:03.895: RIP: ignored v2 update from bad source 192.168.1.1 on FastEthernet2/0

Feb 25 22:22:09.083: RIP: received v2 update from 192.168.2.1 on Serial1/5

Feb 25 22:22:09.083: 192.168.1.0/24 via 0.0.0.0 in 1 hops

Feb 25 22:22:10.783: RIP: sending v2 update to 224.0.0.9 via FastEthernet2/0 (192.168.3.1)

Feb 25 22:22:10.783: RIP: build update entries

Feb 25 22:22:10.783: 192.168.1.0/24 via 0.0.0.0, metric 2, tag 0

Feb 25 22:22:10.783: 192.168.2.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:22:15.067: RIP: sending v2 update to 224.0.0.9 via Serial1/5 (192.168.2.2)

Feb 25 22:22:15.067: RIP: build update entries

Feb 25 22:22:15.067: 192.168.3.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:22:32.975: RIP: ignored v2 update from bad source 192.168.1.1 on FastEthernet2/0

Feb 25 22:22:37.651: RIP: sending v2 update to 224.0.0.9 via FastEthernet2/0 (192.168.3.1)

Feb 25 22:22:37.651: RIP: build update entries

Feb 25 22:22:37.651: 192.168.1.0/24 via 0.0.0.0, metric 2, tag 0

Feb 25 22:22:37.651: 192.168.2.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:22:38.463: RIP: received v2 update from 192.168.2.1 on Serial1/5

Feb 25 22:22:38.463: 192.168.1.0/24 via 0.0.0.0 in 1 hops

Feb 25 22:22:42.807: RIP: sending v2 update to 224.0.0.9 via Serial1/5 (192.168.2.2)

Feb 25 22:22:42.807: RIP: build update entries

Feb 25 22:22:42.807: 192.168.3.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:23:00.651: RIP: ignored v2 update from bad source 192.168.1.1 on FastEthernet2/0

Feb 25 22:23:05.571: RIP: sending v2 update to 224.0.0.9 via FastEthernet2/0 (192.168.3.1)

Feb 25 22:23:05.571: RIP: build update entries

Feb 25 22:23:05.571: 192.168.1.0/24 via 0.0.0.0, metric 2, tag 0

Feb 25 22:23:05.571: 192.168.2.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:23:07.139: RIP: received v2 update from 192.168.2.1 on Serial1/5

Feb 25 22:23:07.139: 192.168.1.0/24 via 0.0.0.0 in 1 hops

Feb 25 22:23:11.427: RIP: sending v2 update to 224.0.0.9 via Serial1/5 (192.168.2.2)

Feb 25 22:23:11.427: RIP: build update entries

Feb 25 22:23:11.427: 192.168.3.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:23:29.307: RIP: ignored v2 update from bad source 192.168.1.1 on FastEthernet2/0

Feb 25 22:23:32.483: RIP: sending v2 update to 224.0.0.9 via FastEthernet2/0 (192.168.3.1)

Feb 25 22:23:32.483: RIP: build update entries

Feb 25 22:23:32.483: 192.168.1.0/24 via 0.0.0.0, metric 2, tag 0

Feb 25 22:23:32.483: 192.168.2.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:23:33.027: RIP: received v2 update from 192.168.2.1 on Serial1/5

Feb 25 22:23:33.027: 192.168.1.0/24 via 0.0.0.0 in 1 hops

Feb 25 22:23:39.155: RIP: sending v2 update to 224.0.0.9 via Serial1/5 (192.168.2.2)

Feb 25 22:23:39.155: RIP: build update entries

Feb 25 22:23:39.155: 192.168.3.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:23:56.275: RIP: ignored v2 update from bad source 192.168.1.1 on FastEthernet2/0

Feb 25 22:23:59.259: RIP: received v2 update from 192.168.2.1 on Serial1/5

Feb 25 22:23:59.259: 192.168.1.0/24 via 0.0.0.0 in 1 hops

Feb 25 22:23:59.787: RIP: sending v2 update to 224.0.0.9 via FastEthernet2/0 (192.168.3.1)

Feb 25 22:23:59.787: RIP: build update entries

Feb 25 22:23:59.787: 192.168.1.0/24 via 0.0.0.0, metric 2, tag 0

Feb 25 22:23:59.787: 192.168.2.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:24:08.319: RIP: sending v2 update to 224.0.0.9 via Serial1/5 (192.168.2.2)

Feb 25 22:24:08.319: RIP: build update entries

Feb 25 22:24:08.319: 192.168.3.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:24:24.599: RIP: ignored v2 update from bad source 192.168.1.1 on FastEthernet2/0

Feb 25 22:24:25.371: RIP: received v2 update from 192.168.2.1 on Serial1/5

Feb 25 22:24:25.371: 192.168.1.0/24 via 0.0.0.0 in 1 hops

Feb 25 22:24:25.819: RIP: sending v2 update to 224.0.0.9 via FastEthernet2/0 (192.168.3.1)

Feb 25 22:24:25.819: RIP: build update entries

Feb 25 22:24:25.819: 192.168.1.0/24 via 0.0.0.0, metric 2, tag 0

Feb 25 22:24:25.819: 192.168.2.0/24 via 0.0.0.0, metric 1, tag 0

Feb 25 22:24:37.127: RIP: sending v2 update to 224.0.0.9 via Serial1/5 (192.168.2.2)

Feb 25 22:24:37.127: RIP: build update entries

Feb 25 22:24:37.127: 192.168.3.0/24 via 0.0.0.0, metric 1, tag 0

这个时候在计算机A上:

Request timed out.

Request timed out.

Request timed out.

Request timed out.

Request timed out.

Reply from 192.168.3.2: bytes=32 time=126ms TTL=126

Reply from 192.168.3.2: bytes=32 time=174ms TTL=126

Reply from 192.168.3.2: bytes=32 time=157ms TTL=126

Reply from 192.168.3.2: bytes=32 time=144ms TTL=126

Reply from 192.168.3.2: bytes=32 time=194ms TTL=126

Reply from 192.168.3.2: bytes=32 time=215ms TTL=126

Reply from 192.168.3.2: bytes=32 time=199ms TTL=126

Reply from 192.168.3.2: bytes=32 time=163ms TTL=126

在都运行V2的情况下网络继续连通。

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