海南大学信息科学技术学院
实验报告
实验名称：动态路由协议RIP与OSPF的配置
学号：20151681310139 姓名：李新宇班级：电子信息类05班
一、实验目的
1、熟悉CISCO IOS和CLI命令模式的使用；
2、了解和掌握路由器基本配置命令的使用；
3、掌握动态路由协议的配置；
4、掌握VLAN中路由器的设置；
3.掌握RIP与OSPF路由协议及其配置。
二、实验设备与环境
Windows 2000 Server/Advance Server主机局域网、CISCO Catalyst 2950交换机和2600系列路由器，Cisco Packet Tracer 7.0软件。
三、实验内容
3.1 课内实验任务
（2）实验过程
0）创建拓扑图
1）采用配置PC1和PC2的IP地址和子网掩码。
2）连接到路由器Router3，配置路由器的RIP，命令如下：
Router>enable
Router#conf terminal
Router(config)#hostname R3
R3(config)#interface FastEthernet 0/0
R3(config-if)#ip address 11.0.0.1 255.255.255.0
R3(config-if)#no shutdown
R3(config-if)#interface FastEthernet 0/1
R3(config-if)#ip address 12.0.0.1 255.255.255.0
R3(config-if)#no shutdown
R3(config-if)#interface serial 0
R3(config-if)#ip address 10.0.0.1 255.255.255.0
R3(config-if)#bandwidth 128 //设置链路带宽为128kbit/s
R3(config-if)#clock rate 64000 //设置DCE设备的时钟速率
R3(config-if)#no shutdown
R3(config-if)#exit
-------------设置路由器R3的RIP -------------------------------------- R3(config)#router rip //设置RIP
R3(config-router)#network 10.0.0.0 //设置接口S0连接的网络地址
R3(config-router)#network 11.0.0.0//设置接口E0连接的网络地址
R3(config-router)#network 12.0.0.0 //设置接口E1连接的网络地址
R3(config-router)#end
R3(config)#router rip//设置RIP
R3(config-router)#network 10.0.0.0//设置接口S0连接的网络地址
R3(config-router)#network 11.0.0.0//设置接口E0连接的网络地址
R3(config-router)#network 12.0.0.0//设置接口E1连接的网络地址
R3(config-router)#end
R3#
%SYS-5-CONFIG_I: Configured from console by console
//配置过程不再列出
5）按照步骤（3）分别完成对路由器R1、R2、R4的RIP配置。
R1(config)#router rip //设置路由器R1的RIP
R1(config-router)#network 11.0.0.0
R1(config-router)#end
R1(config)#router rip //设置路由器R1的RIP
R1(config-router)#network 11.0.0.0
R1(config-router)#end
R1#
%SYS-5-CONFIG_I: Configured from console by console
------------设置路由器R2的RIP ---------------------------------------
R2(config)#router rip //设置路由器R2的RIP
R2(config-router)#network 12.0.0.0
R2(config-router)#end
R2(config)#router rip //设置R2的RIP
R2(config-router)#network 12.0.0.0
R2(config-router)#end
R2#
%SYS-5-CONFIG_I: Configured from console by console
------------设置路由器R4的RIP---------------------------------------
R4(config)#router rip //设置路由器R4的RIP
R4(config-router)#network 10.0.0.0
R4(config-router)#network 192.168.1.0
R4(config-router)#end
R4(config)#rout rip //设置R4的rip
R4(config-router)#network 10.0.0.0
R4(config-router)#network 192.168.1.0
R4(config-router)#end
6）连接到路由器R1中，通过命令“show ip route”显示R1的动态路由表，观察路由表项，当目标网络是192.168.1.0/24时，需要多少跳数（hops）？通过命令“show ip protocols”查看每台路由器的协议。
R1>show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
Gateway of last resort is not set
R 10.0.0.0/8 [120/1] via 11.0.0.1, 00:00:20, FastEthernet0/0
11.0.0.0/24 is subnetted, 1 subnets
C 11.0.0.0 is directly connected, FastEthernet0/0
R 12.0.0.0/8 [120/1] via 11.0.0.1, 00:00:20, FastEthernet0/0
R 192.168.1.0/24 [120/2] via 11.0.0.1, 00:00:20, FastEthernet0/0
答；有路由表可知，到达192.168.1.0需要两跳。显示协议如下
R1>show ip protocol
Routing Protocol is "rip"//协议是RIP协议
Sending updates every 30 seconds, next due in 13 seconds
Invalid after 180 seconds, hold down 180, flushed after 240
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Redistributing: rip
Default version control: send version 1, receive any version
Interface Send Recv Triggered RIP Key-chain
FastEthernet0/0 1 2 1
Automatic network summarization is in effect
Maximum path: 4
Routing for Networks:
11.0.0.0
Passive Interface(s):
Routing Information Sources:
Gateway Distance Last Update
11.0.0.1 120 00:00:19
Distance: (default is 120)
7）连接到R2、R3和R4，通过“show ip route”和“show ip protocols”命令查看每台路由器的路由表和协议。
R2: R2的路由表：R2>show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
R 10.0.0.0/8 [120/1] via 12.0.0.1, 00:00:19, FastEthernet0/0
R 11.0.0.0/8 [120/1] via 12.0.0.1, 00:00:19, FastEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
C 12.0.0.0 is directly connected, FastEthernet0/0
R 192.168.1.0/24 [120/2] via 12.0.0.1, 00:00:19, FastEthernet0/0
//需要两跳
R2所用协议：R2>show ip protocols
Routing Protocol is "rip"
Sending updates every 30 seconds, next due in 11 seconds
Invalid after 180 seconds, hold down 180, flushed after 240
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set Redistributing: rip
Default version control: send version 1, receive any version
Interface Send Recv Triggered RIP Key-chain
FastEthernet0/0 1 2 1
Automatic network summarization is in effect
Maximum path: 4
Routing for Networks:
12.0.0.0
Passive Interface(s):
Routing Information Sources:
Gateway Distance Last Update
12.0.0.1 120 00:00:25
Distance: (default is 120)
R3：
R3路由表：
R3>show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area * - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
10.0.0.0/24 is subnetted, 1 subnets
11.0.0.0/24 is subnetted, 1 subnets
C 11.0.0.0 is directly connected, FastEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
C 12.0.0.0 is directly connected, FastEthernet0/1
R 192.168.1.0/24 [120/1] via 10.0.0.2, 00:00:09, Serial0/0
//需要一跳
R3协议：R3>show ip protocol
Routing Protocol is "rip"
Sending updates every 30 seconds, next due in 12 seconds
Invalid after 180 seconds, hold down 180, flushed after 240
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set Redistributing: rip
Default version control: send version 1, receive any version
Interface Send Recv Triggered RIP Key-chain
Serial0/0 1 2 1
FastEthernet0/0 1 2 1
FastEthernet0/1 1 2 1
Automatic network summarization is in effect
Maximum path: 4
Routing for Networks:
10.0.0.0
11.0.0.0
12.0.0.0
Passive Interface(s):
Routing Information Sources:
Gateway Distance Last Update
10.0.0.2 120 00:00:14
Distance: (default is 120)
R4：
R4路由表：R4>show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area * - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
10.0.0.0/24 is subnetted, 1 subnets
C 10.0.0.0 is directly connected, Serial0/0
R 12.0.0.0/8 [120/1] via 10.0.0.1, 00:00:03, Serial0/0
C 192.168.1.0/24 is directly connected, FastEthernet0/0
R4协议：R4>show ip protocols
Routing Protocol is "rip"
Sending updates every 30 seconds, next due in 1 seconds Invalid after 180 seconds, hold down 180, flushed after 240 Outgoing update filter list for all interfaces is not set Incoming update filter list for all interfaces is not set Redistributing: rip
Default version control: send version 1, receive any version Interface Send Recv Triggered RIP Key-chain
Serial0/0 1 2 1
FastEthernet0/0 1 2 1
Automatic network summarization is in effect
Maximum path: 4
Routing for Networks:
10.0.0.0
192.168.1.0
Passive Interface(s):
Routing Information Sources:
Gateway Distance Last Update
10.0.0.1 120 00:00:24
Distance: (default is 120)
8）使用ping命令测试到路由器各接口的连通状态，以检测路由器的配置。
用PC1测试与各个路由器接口的连接性：
C:\>ping 11.0.0.1
Pinging 11.0.0.1 with 32 bytes of data:
Reply from 11.0.0.1: bytes=32 time=31ms TTL=254
Reply from 11.0.0.1: bytes=32 time=31ms TTL=254
Reply from 11.0.0.1: bytes=32 time=15ms TTL=254
Reply from 11.0.0.1: bytes=32 time=31ms TTL=254
Ping statistics for 11.0.0.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds:
Minimum = 15ms, Maximum = 31ms, Average = 27ms
//接通
C:\>ping 12.0.0.2
Pinging 12.0.0.2 with 32 bytes of data:
Reply from 12.0.0.2: bytes=32 time=16ms TTL=253 Reply from 12.0.0.2: bytes=32 time=31ms TTL=253 Reply from 12.0.0.2: bytes=32 time=31ms TTL=253 Reply from 12.0.0.2: bytes=32 time=47ms TTL=253
Ping statistics for 12.0.0.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 16ms, Maximum = 47ms, Average = 31ms
//接通
C:\>ping 192.168.1.1
Pinging 192.168.1.1 with 32 bytes of data:
Reply from 192.168.1.1: bytes=32 time<1ms TTL=255 Reply from 192.168.1.1: bytes=32 time<1ms TTL=255 Reply from 192.168.1.1: bytes=32 time<1ms TTL=255 Reply from 192.168.1.1: bytes=32 time<1ms TTL=255
Ping statistics for 192.168.1.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 0ms, Average = 0ms
//接通
C:\>ping 10.0.0.2
Pinging 10.0.0.2 with 32 bytes of data:
Reply from 10.0.0.2: bytes=32 time<1ms TTL=255
Reply from 10.0.0.2: bytes=32 time<1ms TTL=255
Reply from 10.0.0.2: bytes=32 time=15ms TTL=255 Reply from 10.0.0.2: bytes=32 time<1ms TTL=255
Ping statistics for 10.0.0.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 15ms, Average = 3ms
//接通
观察发现，pc1可以与所有路由器通信
为简便，此处再使用pc2测试与R1和R2的连通性：
C:\>ping 11.0.0.2
Pinging 11.0.0.2 with 32 bytes of data:
Reply from 11.0.0.2: bytes=32 time=47ms TTL=253
Reply from 11.0.0.2: bytes=32 time=31ms TTL=253
Reply from 11.0.0.2: bytes=32 time=31ms TTL=253
Reply from 11.0.0.2: bytes=32 time=32ms TTL=253
Ping statistics for 11.0.0.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 31ms, Maximum = 47ms, Average = 35ms
Pc2与R1连接成功
C:\>ping 12.0.0.2
Pinging 12.0.0.2 with 32 bytes of data:
Reply from 12.0.0.2: bytes=32 time=15ms TTL=253
Reply from 12.0.0.2: bytes=32 time=31ms TTL=253
Reply from 12.0.0.2: bytes=32 time=31ms TTL=253
Reply from 12.0.0.2: bytes=32 time=31ms TTL=253
Ping statistics for 12.0.0.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 15ms, Maximum = 31ms, Average = 27ms
Pc2与R2连接成功
（3）实验小结
RIP是一个距离矢量路由协议，非常简单，仅通过源节点与目的节点之间的路由器或路程段的数目（跳数）来决定发送数据包的最佳途径。由于RIP自身的一些限制，其允许的最大跳数为15，只适用于小型的网络。RIP 有两种版本：RIPv1和RIPv2。前者不支持VLSM，而后者支持。
2、路由器的OSPF 协议配置
(1)实验准备工作
运用Cisco Packet Tracer 软件设计如下网络拓扑图。不同型号的交换机配置命令不同，这里选择2600系列路由器的2621型号，交换机选择2900系列。IP 地址、掩码和连接路由器的端口号如图所示。将网络拓扑图保存，并在Cisco Packet Tracer 模拟器中打开该图（参考实验4的方法）。
（2）实验过程
1）使用上述的网络拓扑图作为本实验所需的网络，配置PC 的IP 地址和子网掩码。
//拓扑图如下
2）连接到路由器Router3，配置路由器的OSPF ，命令如下：
Router>enable
Router#conf terminal
Router(config)#hostname R3
f0/0 f0/0 f0/0 f0/1 se0/0 se0/0 f0/0
f0/1 f0/3 f0/2 IP: 11.0.0.2/24 IP: 11.0.0.1/24 IP: 12.0.0.1/24 IP: 12.0.0.2/24 IP: 10.0.0.1/24 IP: 10.0.0.2/24 IP: 192.168.1.2/24 IP: 192.168.1.3/24 IP: 192.168.1.1/24
R3(config-if)#ip address 11.0.0.1 255.255.255.0
R3(config-if)#no shutdown
R3(config-if)#interface FastEthernet 0/1
R3(config-if)#ip address 12.0.0.1 255.255.255.0
R3(config-if)#no shutdown
R3(config-if)#interface serial 0
R3(config-if)#ip address 10.0.0.1 255.255.255.0
R3(config-if)#bandwidth 128 //设置链路带宽为128kbit/s
R3(config-if)#clock rate 64000 //设置DCE设备的时钟速率
R3(config-if)#no shutdown
R3(config-if)#exit
//启动进程号为10的单区域OSPF路由选择进程
R3(config)#router ospf 10
//在接口S0启动OSPF，加入区域0
R3(config-router)#network 10.0.0.0 0.0.0.255 area 0 //通告直连网络
//在接口F0/0启动OSPF，加入区域0
R3(config-router)#network 11.0.0.0 0.0.0.255 area 0 //通告直连网络
//在接口F0/1启动OSPF，加入区域0
R3(config-router)#network 12.0.0.0 0.0.0.255 area 0 //通告直连网络
R3(config-router)#exit
R3(config)#router ospf 10//启动进程号为10的单区域OSPF路由选择进程R3(config-router)#network 10.0.0.0 0.0.0.255 area 0
R3(config-router)#network 11.0.0.0 0.0.0.255 area 0
R3(config-router)#network 12.0.0.0 0.0.0.255 area 0
R3(config-router)#exit
R3(config)#
4）按照步骤（3）分别完成路由器R1、R2、R4的接口和OSPF配置。
//在R1上启动进程号为10的单区域
//OSPF路由选择进程
R1(config)#router ospf 10
R1(config-router)#network 11.0.0.0 0.0.0.255 area 0
R1(config-router)#network 11.0.0.0 0.0.0.255 area 0
//在R2上启动进程号为10的单区域OSPF路由选择进程
R2(config)#router ospf 10
R2(config-router)#network 12.0.0.0 0.0.0.255 area 0
R2(config)#router ospf 10
R2(config-router)#network 11.0.0.0 0.0.0.255 area 0
//在R4上启动进程号为10的单区域OSPF路由选择进程
R4(config)#router ospf 10
R4(config-router)#network 10.0.0.0 0.0.0.255 area 0
R4(config-router)#network 192.168.1.0 0.0.0.255 area 0
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#router ospf 10
//启动进程号为10的单区域OSPF路由选择进程
Router(config-router)#network 10.0.0.0 0.0.0.255 area 0
Router(config-router)#networ
00:09:20: %OSPF-5-ADJCHG: Process 10, Nbr 12.0.0.1 on Serial0/0 from LOADING to FULL, Loading Done
% Incomplete command.
Router(config-router)#network 192.168.1.0 0.0.0.255 area 0
Router(config-router)#exit
5）连接到路由器R1中，通过命令“show ip route”显示R1的动态路由表，观察路由表项，当目标网络是192.168.1.0/24时，度量值为多少？
R1>show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
10.0.0.0/24 is subnetted, 1 subnets
O 10.0.0.0 [110/65] via 11.0.0.1, 00:05:34, FastEthernet0/0
11.0.0.0/24 is subnetted, 1 subnets
C 11.0.0.0 is directly connected, FastEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
O 12.0.0.0 [110/2] via 11.0.0.1, 00:05:34, FastEthernet0/0
O 192.168.1.0/24 [110/66] via 11.0.0.1, 00:00:47, FastEthernet0/0
6）连接到R2、R3和R4，查看每台路由器的路由表。
R2：R2>show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area * - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
10.0.0.0/24 is subnetted, 1 subnets
O 10.0.0.0 [110/65] via 12.0.0.1, 00:06:26, FastEthernet0/0
11.0.0.0/24 is subnetted, 1 subnets
O 11.0.0.0 [110/2] via 12.0.0.1, 00:06:26, FastEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
C 12.0.0.0 is directly connected, FastEthernet0/0
O 192.168.1.0/24 [110/66] via 12.0.0.1, 00:06:26, FastEthernet0/0
R3：R3>show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area * - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
10.0.0.0/24 is subnetted, 1 subnets
C 10.0.0.0 is directly connected, Serial0/0
11.0.0.0/24 is subnetted, 1 subnets
C 11.0.0.0 is directly connected, FastEthernet0/0
12.0.0.0/24 is subnetted, 1 subnets
C 12.0.0.0 is directly connected, FastEthernet0/1
O 192.168.1.0/24 [110/65] via 10.0.0.2, 00:03:13, Serial0/0
//度量值为65
R4：Router>show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
10.0.0.0/24 is subnetted, 1 subnets
C 10.0.0.0 is directly connected, Serial0/0
11.0.0.0/24 is subnetted, 1 subnets
O 11.0.0.0 [110/65] via 10.0.0.1, 00:04:12, Serial0/0
12.0.0.0/24 is subnetted, 1 subnets
O 12.0.0.0 [110/65] via 10.0.0.1, 00:04:12, Serial0/0
C 192.168.1.0/24 is directly connected, FastEthernet0/0
7）使用ping命令测试到路由器各接口的连通状态，以检测路由器的配置。
用PC1测试：
与R2连接情况：
C:\>ping 12.0.0.2
Pinging 12.0.0.2 with 32 bytes of data:
Reply from 12.0.0.2: bytes=32 time=1ms TTL=253
Reply from 12.0.0.2: bytes=32 time=1ms TTL=253
Reply from 12.0.0.2: bytes=32 time=1ms TTL=253
Reply from 12.0.0.2: bytes=32 time=12ms TTL=253
Ping statistics for 12.0.0.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 12ms, Average = 3ms
//接通
与R1连接情况：C:\>ping 11.0.0.2
Pinging 11.0.0.2 with 32 bytes of data:
Reply from 11.0.0.2: bytes=32 time=2ms TTL=253
Reply from 11.0.0.2: bytes=32 time=11ms TTL=253
Reply from 11.0.0.2: bytes=32 time=1ms TTL=253
Reply from 11.0.0.2: bytes=32 time=4ms TTL=253
Ping statistics for 11.0.0.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Minimum = 1ms, Maximum = 11ms, Average = 4ms
//接通
用PC2测试与R2连接情况：
Pinging 12.0.0.2 with 32 bytes of data:
Reply from 12.0.0.2: bytes=32 time=2ms TTL=253
Reply from 12.0.0.2: bytes=32 time=1ms TTL=253
Reply from 12.0.0.2: bytes=32 time=1ms TTL=253
Reply from 12.0.0.2: bytes=32 time=13ms TTL=253
Ping statistics for 12.0.0.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 13ms, Average = 4ms
//接通
用pc2测试与R1连接情况：
C:\>ping 11.0.0.2
Pinging 11.0.0.2 with 32 bytes of data:
Reply from 11.0.0.2: bytes=32 time=1ms TTL=253
Reply from 11.0.0.2: bytes=32 time=1ms TTL=253
Reply from 11.0.0.2: bytes=32 time=1ms TTL=253
Reply from 11.0.0.2: bytes=32 time=1ms TTL=253
Ping statistics for 11.0.0.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 1ms, Average = 1ms
//接通青山埋白骨，绿水吊忠魂。