top图如上所示：
要求如下:(1)在路由器R3上面使用ping命令，能ping通R2 但是不通ping通R1
(2)在路由器1上面可以ping通R2和R3
(3)在路由器2上面使用ping命令，能ping通R1。也能ping通R3上面的S0(20.1.1.3)
不通ping通R3上面的L0(30.1.1.3)
使用EIGRP动态路由协议 ，区域号是100
R1#show run
Building configuration...
Current configuration : 508 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
ip subnet-zero
!
!
!
!
interface Ethernet0
ip address 10.1.1.1 255.255.255.0
!
interface Serial0
no ip address
shutdown
!
interface Serial1
no ip address
shutdown
!
router eigrp 100 //eigrp区域号为100
network 10.1.1.0 0.0.0.255
no auto-summary //关掉自动汇总
!
no ip http server
ip classless
!
!
!
!
line con 0
line aux 0
line vty 0 4
!
end
R1#ping 20.1.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 20.1.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/4/8 ms
R1#ping 30.1.1.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 30.1.1.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/37/40 ms
R2#show run
Building configuration...
Current configuration:
!
version 12.1
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname R2
!
!
!
!
!
!
ip subnet-zero
no ip domain-lookup
!
!
!
!
interface Ethernet0
ip address 10.1.1.2 255.255.255.0
ip access-group 101 out //在EO口上面绑定编号为101的扩展访问控制列表，从这个端口输
! 从这个端口离开
interface Serial0
ip address 20.1.1.2 255.255.255.0
clockrate 56000 //配置DCE时钟
!
interface Serial1
no ip address
shutdown
!
interface BRI0
no ip address
shutdown
!
router eigrp 100
network 10.1.1.0 0.0.0.255
network 20.1.1.0 0.0.0.255
no auto-summary
!
ip classless
no ip http server
!
access-list 101 deny icmp host 20.1.1.3 host 10.1.1.1 echo //访问列表编号为101 扩展列表
//拒绝icmp协议 源地址为20.1.1.3 目的地址为10.1.1.1
access-list 101 permit ip any any //许可其它的数据经过
!
line con 0
no exec
transport input none
line aux 0
line vty 0 4
!
end
R2#ping 10.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/5/8 ms
R2#ping 20.1.1.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 20.1.1.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/35/36 ms
R2#ping 30.1.1.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 30.1.1.3, timeout is 2 seconds:
U.U.U //ping 路由器R3上面的端口不可达
Success rate is 0 percent (0/5)
R3#show run
Building configuration...
Current configuration:
!
version 12.1
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname R3
!
!
!
!
!
!
ip subnet-zero
!
!
!
!
interface Loopback0
ip address 30.1.1.3 255.255.255.0
!
interface Ethernet0
no ip address
shutdown
!
interface Serial0
ip address 20.1.1.3 255.255.255.0
ip access-group 102 in
!
interface Serial1
no ip address
shutdown
!
router eigrp 100
network 20.1.1.0 0.0.0.255
network 30.1.1.0 0.0.0.255
no auto-summary
!
ip classless
no ip http server
!
access-list 102 deny icmp 20.1.1.0 0.0.0.255 host 30.1.1.3 echo //访问列表编号为102扩展
// 列表 拒绝icmp协议 源地址为20.1.1.0这个网段内的
// 所有地址，目的地址为30.1.1.3
access-list 102 permit ip any any //许可其它的数据经过
!
line con 0
transport input none
line aux 0
line vty 0 4
!
end
R3#ping 10.1.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:
U.U.U //ping路由器R1不可到达
Success rate is 0 percent (0/5)
R3#ping 10.1.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/36/36 ms
R3#ping 20.1.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 20.1.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 32/35/36 ms
R3#ping 20.1.1.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 20.1.1.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 68/70/80 ms
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