Show IP NAT Statistics Command on CISCO Router/Switch

Command

Show IP NAT Statistics

Use

This command shows various NAT statistics. It is useful for troubleshooting.

Syntax

Router#show ip nat statistics

Example

In the below example we configure R2 to translate addresses from 10.1.1.0/24 to 10.2.2.0/24.

R2(config)#access-list 25 permit 10.1.1.0 0.0.0.255
R2(config)#ip nat inside source list 25 interface fa1/0
R2(config)#int fa0/0
R2(config-if)#ip nat inside
R2(config-if)#int fa1/0
R2(config-if)#ip nat out

Now we will do several pings to generate NAT traffic.

Success rate is 0 percent (0/5)
R1(config-if)#do ping 10.2.2.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.2.2.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/33/84 ms
R1(config-if)#do ping 10.2.2.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.2.2.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/42/88 ms
R1(config-if)#do ping 10.2.2.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.2.2.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/34/64 ms
R1(config-if)#

Then we can see the NAT statistics using the show ip nat statistics command.

R2(config)#do show ip nat statistics
Total active translations: 0 (0 static, 0 dynamic; 0 extended)
Outside interfaces:
FastEthernet1/0
Inside interfaces:
FastEthernet0/0
Hits: 27 Misses: 3
CEF Translated packets: 30, CEF Punted packets: 0
Expired translations: 3
Dynamic mappings:
— Inside Source
[Id: 1] access-list 25 interface FastEthernet1/0 refcount 0
Queued Packets: 0

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