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Cicso router Gods step in (IOS COMMANDS)

A

alexgtp

newbie extrodinaire!!
Joined
Oct 19, 2004
Messages
3,627
Location
Villa Nueva, Guatemala C.A.
I have been having a probmlem for the past week. And I am unable to figure out why.

one of our remote sites is using NAT translation.

When I add the following information I have never had an issue. But when i add a new entry it will no longer save for longer than 24 hour time period.

I am doing this in CONFIG MODE: TO ADD IP ADDY TO NAT TABLES

routername(config)# ip nat inside source static 10.4.0.99 192.168.2.199
After i do this command I check the :show running-config: command and all the IP addresses in the table show up INCLUDING the most recent one I added.

The following day this particular IP address I added the day before is no longer able to see across the WAN.

When I log into router to check the NAT tables the last entry is no longer there. Does anyone know why the address is not saving?
Is there a way to do a forced save of the configuration without impacting the router and or taking it offline for a reflash?

Thanks.

Alex
 
You are saving the running config, right? Do you have anything like SolarWinds Cirrus that'll restore baseline configs or make changes over the night? Do the logs show anyone else logging into the router?

This is what I do for the Army, but I've never had this issue (not that we're allowed to use NAT, anyway). :)
 
No one else logs in but me. ANd no programs running that restore baseline configs
Unfortunately i inherited this network. SO its not my first choice on how to set up a nework.
The logs are also clean.

Maybe its time for a reflash.
 
This might be too simple but have you checked the NAT pool to make sure you have enough addresses?
 
I'd hold off on re-flashing the IOS for this; that's a bit extreme, IMHO. After you've added your "IP NAT ..." do a WRITE MEM to store your config. If your router's reloading (power fail, for example) you'd lose the "IP NAT ..." spec.
 
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