Router NAT Cisco-Commands – How to Clear All Static NAT Entries with One Command

I am using cisco 2901 Router with IOS version 15M. In the configuration of the router I am using lots of static NAT entries. And I need to change these entries when it is requested.

And a possible solution for this situation are the configuration files that I saved to the flash0: of the cisco 2901 router. However, by using configuration files, I can't delete existing NAT entries. But on the other hand, I can create a static NAT entry using these configuration files.

Therefore, I am looking for a command that will clear all the static NAT entries. Then I will create static NAT entries using these configuration files.

Notes:

• I tried the following commands to clear the NAT entries, but these all are for dynamic NAT entries. Thus, they did not work.


clear ip nat translation *
clear ip nat translation forced
do clear ip nat translation *
do clear ip nat translation forced

• A possible solution (although it takes too much time): First create a configuration file that does not have any static NAT entry:

  copy running-config flash0:config_0_entry

Then copy this configuration to the startup-config and reboot. (These two command will wipe out all the static entries.)

copy flash0:config_0_entry startup-config
reload 

Then after reboot, load your configuration file into the router:

copy flash0:your_config_file running_config

I could use this method, but the reboot takes too much time. I cannot wait that long.