CCNA:CISCO PAT
R1 S0/0 199.1.1.1
R2 S0/0 199.1.1.2
在没有配置NAT之前 pc 1，2，3 ping不通 199.1.1.2
在R1上
Router(config)#ip nat pool rscpass 199.1.1.1 199.1.1.1 netmask 255.255.255.0
Router(config)#access-list 1 per 192.168.1.0 0.0.0.255
Router(config)#access-list 1 per 192.168.2.0 0.0.0.255
Router(config)#ip nat inside source list 1 pool rscpass overload
Router(config)#int s0/0
Router(config-if)#ip nat ou
Router(config-if)#ip nat outside
Router(config-if)#int f0/0
Router(config-if)#ip nat in
Router(config-if)#ip nat inside
在pc1上ping 199.1.1.2
PC>ping 199.1.1.2
Pinging 199.1.1.2 with 32 bytes of data:
Reply from 199.1.1.2: bytes=32 time=203ms TTL=254
Reply from 199.1.1.2: bytes=32 time=141ms TTL=254
Reply from 199.1.1.2: bytes=32 time=90ms TTL=254
Reply from 199.1.1.2: bytes=32 time=109ms TTL=254
Ping statistics for 199.1.1.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 90ms, Maximum = 203ms, Average = 135ms
在R1上输入 debug ip nat
NAT: s=192.168.1.10->199.1.1.1, d=199.1.1.2
NAT*: s=199.1.1.2, d=199.1.1.1->192.168.1.10
NAT: s=192.168.1.10->199.1.1.1, d=199.1.1.2
NAT*: s=199.1.1.2, d=199.1.1.1->192.168.1.10
NAT: s=192.168.1.10->199.1.1.1, d=199.1.1.2
NAT*: s=199.1.1.2, d=199.1.1.1->192.168.1.10
NAT: s=192.168.1.10->199.1.1.1, d=199.1.1.2
NAT*: s=199.1.1.2, d=199.1.1.1->192.168.1.10
NAT: expiring 199.1.1.1 (192.168.1.10) 1 9 (9)
NAT: expiring 199.1.1.1 (192.168.1.10) 1 10 (10)
NAT: expiring 199.1.1.1 (192.168.1.10) 1 11 (11)
NAT: expiring 199.1.1.1 (192.168.1.10) 1 12 (12)
在R2debug ip packet
IP: tableid=0, s=199.1.1.1 (Serial0/0), d=199.1.1.2 (Serial0/0), routed via RIB
IP: s=199.1.1.1 (Serial0/0), d=199.1.1.2 (Serial0/0), len 0, rcvd 3
IP: tableid=0, s=199.1.1.2 (local), d=199.1.1.1 (Serial0/0), routed via RIB
IP: s=199.1.1.2 (local), d=199.1.1.1 (Serial0/0), len 0, sending
IP: tableid=0, s=199.1.1.1 (Serial0/0), d=199.1.1.2 (Serial0/0), routed via RIB
IP: s=199.1.1.1 (Serial0/0), d=199.1.1.2 (Serial0/0), len 0, rcvd 3
IP: tableid=0, s=199.1.1.2 (local), d=199.1.1.1 (Serial0/0), routed via RIB
IP: s=199.1.1.2 (local), d=199.1.1.1 (Serial0/0), len 0, sending
IP: tableid=0, s=199.1.1.1 (Serial0/0), d=199.1.1.2 (Serial0/0), routed via RIB
IP: s=199.1.1.1 (Serial0/0), d=199.1.1.2 (Serial0/0), len 0, rcvd 3
IP: tableid=0, s=199.1.1.2 (local), d=199.1.1.1 (Serial0/0), routed via RIB
IP: s=199.1.1.2 (local), d=199.1.1.1 (Serial0/0), len 0, sending
IP: tableid=0, s=199.1.1.1 (Serial0/0), d=199.1.1.2 (Serial0/0), routed via RIB
IP: s=199.1.1.1 (Serial0/0), d=199.1.1.2 (Serial0/0), len 0, rcvd 3
IP: tableid=0, s=199.1.1.2 (local), d=199.1.1.1 (Serial0/0), routed via RIB
IP: s=199.1.1.2 (local), d=199.1.1.1 (Serial0/0), len 0, sending
r1s how ip nat statistics
Total translations: 4 (0 static, 4 dynamic, 4 extended)
Outside Interfaces: Serial0/0
Inside Interfaces: FastEthernet0/0
Hits: 8Misses: 8
Expired translations: 4
Dynamic mappings:
-- Inside Source
access-list 1 pool xiaofanfan refCount 4
pool xiaofanfan: netmask 255.255.255.0
start 199.1.1.1 end 199.1.1.1
type generic, total addresses 1 , allocated 1 (100%), misses 0
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