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Community Member

Cannot Remove static Nat entry from 2801 Router

Hi All,

I have cisco 2801 router , which uses static nat translation for thirdparty vendors.

My Problem is , I cant remove the nat entry from my router

2801(config)#no ip nat outside source static 10.4.7.90 10.9.1.1

The router will take the command but nothing happens.

if i give 2801#show run | i 10.4.7.90 , it still there
ip nat outside source static 10.4.7.90 10.9.1.1

I tried to add another nat to the existing line, then i got

2801(config)#ip nat outside source static 10.3.4.6 10.9.1.1

% similar static entry (10.9.1.1-> 10.4.7.90 ) already exists

The router version is

Cisco IOS Software, 2800 Software (C2800NM-IPVOICEK9-M), Version 12.4(11)XJ4, RELEASE SOFTWARE (fc2)

there is nothing in the logs aswell.

did any one of you faced the similar problem , ?

thanks

1 ACCEPTED SOLUTION

Accepted Solutions
Community Member

Re: Cannot Remove static Nat entry from 2801 Router

Try the following:

1) Restart 2801

2) apply configuration change

3) write memory

4) restart 2801

5) check running config.

You may not need the 2nd restart, but I didn't want you to stop if after you restarted the 1st time it didn't apply to running config. 

(edit)

to answer your other question.  Yes I have had this happen and other variants.  It is a fault with the router hardware and/or IOS.  the restart will clear out the clog and allow new changes to occur.  the 2nd restart is for good measure as I have seen, although extremely rare, where the problem is that the IOS has problems applying your config and will keep having change problems until a change is made, applied, and restarted.  If I knew why it happened I would have already of submitted a fix to cisco

3 REPLIES
Community Member

Re: Cannot Remove static Nat entry from 2801 Router

Try the following:

1) Restart 2801

2) apply configuration change

3) write memory

4) restart 2801

5) check running config.

You may not need the 2nd restart, but I didn't want you to stop if after you restarted the 1st time it didn't apply to running config. 

(edit)

to answer your other question.  Yes I have had this happen and other variants.  It is a fault with the router hardware and/or IOS.  the restart will clear out the clog and allow new changes to occur.  the 2nd restart is for good measure as I have seen, although extremely rare, where the problem is that the IOS has problems applying your config and will keep having change problems until a change is made, applied, and restarted.  If I knew why it happened I would have already of submitted a fix to cisco

Community Member

Re: Cannot Remove static Nat entry from 2801 Router

Hi Ryan,Shahaludeen,

Many thanks for your help, Its resolved by reloading the router.

thanks and regards

A

Community Member

Re: Cannot Remove static Nat entry from 2801 Router

Hi,

The way to remove the nat entry is as follows;

1) Remove the ip nat inside/ip nat outside command from the interface. Removing either one of them will do the trick.

2) Now issue the command clear ip nat translation *

3) then type the command no ip nat outside source static 10.4.7.90 10.9.1.1

This will remove your entry.

Regards,

Shahal.

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