这是一个关于NAT负载均衡和telnet的实验，具体的方法下面有详述。在参数配置中，需要配置服务器的果哦你网IP、内网地址范围和实现配置目标的nat转换，最后进行一次测试。
拓扑图：
配置参数：
r2(config)#acc 1 per 12.1.1.3 0.0.0.0 //配置服务器的公网IP
r2(config)#ip nat po 1 192.168.1.2 192.168.1.3 net 255.255.255.0 type rotary //配置服务器的内网地址范围
r2(config)#ip nat inside destination list 1 pool 1 //配置目标NAT转换
r2(config)#end
测试：
r1#ping 12.1.1.1
Sending 5, 100-byte ICMP Echos to 12.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 40/48/80 ms
r1#ping 12.1.1.2
Sending 5, 100-byte ICMP Echos to 12.1.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 20/39/64 ms
r1#telnet 12.1.1.3
Trying 12.1.1.3 ... Open
Username: r3
Password:
r3#sh ip int b
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 192.168.1.2 YES manual up up
r3#exi
r1#telnet 12.1.1.3
Trying 12.1.1.3 ... Open
Username: r4
Password:
r4#sh ip int b
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 192.168.1.3 YES manual up up
r4#exi
r1#
r2#sh ip na tr
Pro Inside global Inside local Outside local Outside global
tcp 12.1.1.3:23 192.168.1.2:23 12.1.1.1:11000 12.1.1.1:11000
tcp 12.1.1.3:23 192.168.1.3:23 12.1.1.1:11001 12.1.1.1:11001
r2#
下面是各设备的配置文件：
r3#sh run
Building configuration...
Current configuration : 686 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r3
!
boot-start-marker
boot-end-marker
!
!
memory-size iomem 5
no aaa new-model
ip subnet-zero
no ip routing
!
!
no ip cef
!
!
ip ips po max-events 100
no ftp-server write-enable
!
!
!
!
!
!
!
!
!
!
!
!
!
!
username r3 privilege 15 password 0 abc
!
!
!
!
!
!
interface FastEthernet0/0
ip address 192.168.1.2 255.255.255.0
no ip route-cache
duplex auto
speed auto
!
ip default-gateway 192.168.1.1
ip http server
no ip http secure-server
ip classless
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
login local
!
!
end
r3#
r4#sh run
Building configuration...
Current configuration : 686 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r4
!
boot-start-marker
boot-end-marker
!
!
memory-size iomem 5
no aaa new-model
ip subnet-zero
no ip routing
!
!
no ip cef
!
!
ip ips po max-events 100
no ftp-server write-enable
http://www.luyouqiwang.com/15403/
!
!
!
!
!
!
!
!
!
!
!
!
username r4 privilege 15 password 0 abc
!
!
!
!
!
!
interface FastEthernet0/0
ip address 192.168.1.3 255.255.255.0
no ip route-cache
duplex auto
speed auto
!
ip default-gateway 192.168.1.1
ip http server
no ip http secure-server
ip classless
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
login local
!
!
end
r4#
r5#sh run
Building configuration...
Current configuration : 1332 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r5
!
boot-start-marker
boot-end-marker
!
!
memory-size iomem 5
no aaa new-model
ip subnet-zero
!
!
ip cef
!
!
ip ips po max-events 100
no ftp-server write-enable
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
no ip address
!
interface FastEthernet0/1
no ip address
!
interface FastEthernet0/2
no ip address
!
interface FastEthernet0/3
no ip address
shutdown
!
interface FastEthernet0/4
no ip address
shutdown
!
interface FastEthernet0/5
no ip address
shutdown
!
interface FastEthernet0/6
no ip address
shutdown
!
interface FastEthernet0/7
no ip address
shutdown
!
interface FastEthernet0/8
no ip address
shutdown
!
interface FastEthernet0/9
no ip address
shutdown
!
interface FastEthernet0/10
no ip address
shutdown
!
interface FastEthernet0/11
no ip address
shutdown
!
interface FastEthernet0/12
no ip address
shutdown
!
interface FastEthernet0/13
no ip address
shutdown
!
interface FastEthernet0/14
no ip address
shutdown
!
interface FastEthernet0/15
no ip address
shutdown
!
interface Vlan1
no ip address
!
ip http server
no ip http secure-server
ip classless
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
!
!
end
r5#sh ip int b
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES unset up up
FastEthernet0/1 unassigned YES unset up up
FastEthernet0/2 unassigned YES unset up up
FastEthernet0/3 unassigned YES unset administratively down down
FastEthernet0/4 unassigned YES unset administratively down down
FastEthernet0/5 unassigned YES unset administratively down down
FastEthernet0/6 unassigned YES unset administratively down down
FastEthernet0/7 unassigned YES unset administratively down down
FastEthernet0/8 unassigned YES unset administratively down down
FastEthernet0/9 unassigned YES unset administratively down down
FastEthernet0/10 unassigned YES unset administratively down down
FastEthernet0/11 unassigned YES unset administratively down down
FastEthernet0/12 unassigned YES unset administratively down down
FastEthernet0/13 unassigned YES unset administratively down down
FastEthernet0/14 unassigned YES unset administratively down down
FastEthernet0/15 unassigned YES unset administratively down down
Vlan1 unassigned YES unset up up
r5#
r1#sh run
Building configuration...
Current configuration : 769 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
!
!
memory-size iomem 5
no aaa new-model
ip subnet-zero
!
!
ip cef
!
!
ip ips po max-events 100
no ftp-server write-enable
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Serial0/0
ip address 12.1.1.1 255.255.255.0
serial restart-delay 0
!
interface Serial0/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
ip http server
no ip http secure-server
ip classless
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
!
!
end
r1#
r2#sh run
Building configuration...
Current configuration : 1157 bytes
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname r2
!
boot-start-marker
boot-end-marker
!
!
memory-size iomem 5
no aaa new-model
ip subnet-zero
!
!
ip cef
!
!
ip ips po max-events 100
no ftp-server write-enable
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Serial0/0
ip address 12.1.1.2 255.255.255.0
ip nat outside
ip virtual-reassembly
serial restart-delay 0
!
interface Serial0/1
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/2
no ip address
shutdown
serial restart-delay 0
!
interface Serial0/3
no ip address
shutdown
serial restart-delay 0
!
interface FastEthernet1/0
ip address 192.168.1.1 255.255.255.0
ip nat inside
ip virtual-reassembly
duplex auto
speed auto
!
interface FastEthernet2/0
no ip address
shutdown
duplex auto
speed auto
!
ip http server
no ip http secure-server
ip classless
!
ip nat pool 1 192.168.1.2 192.168.1.3 netmask 255.255.255.0 type rotary
ip nat inside destination list 1 pool 1
!
!
access-list 1 permit 12.1.1.3
!
!
control-plane
!
!
!
!
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
!
!
end
r2#
作者：NopainsNogains |
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