Cisco Cisco IOS Software Release 12.4(2)T

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NAT Optimized SIP Media Path Without SDP
  clear ip nat translation
8
Cisco IOS Release 12.4(2)T
Router# clear ip nat translation udp inside 10.69.233.209 1220 10.168.1.95 1220
10.69.2.132 53 10.69.2.132 53
Router# show ip nat translations
 
Pro
Inside global
Inside local       Outside local      Outside global
tcp
10.69.233.209:11012 10.168.1.89:11012
10.69.1.220:23 
10.69.1.220:23
tcp
10.69.233.209:1067  10.168.1.95:1067
10.69.1.161:23     10.69.1.161:23
Related Commands
Command
Description
ip nat
Designates that traffic originating from or destined for the interface is 
subject to NAT.
ip nat inside destination
Enables NAT of the inside destination address.
ip nat inside source
Enables NAT of the inside source address.
ip nat outside source
Enables NAT of the outside source address.
ip nat pool
Defines a pool of IP addresses for NAT.
ip nat service
Changes the amount of time after which NAT translations time out.
show ip nat statistics
Displays NAT statistics.
show ip nat translations
Displays active NAT translations.