08-28-2008 02:50 PM - edited 03-03-2019 11:19 PM
When I run a "show ip nat translations" I get a table of traffic that's been NATTED and to where that traffic was headed. The question I have is - how long do these translations live before they expire?
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08-28-2008 03:59 PM
Only active ones.
If you look in the note is says TCP sessions that see a FIN or RST are 1 minute. So if they are closed they will be cleared in 1 minute.
08-28-2008 03:10 PM
1-5 minutes unless you change them.
http://www.cisco.com/en/US/docs/ios/ipaddr/command/reference/iad_nat.html#wp1013201
08-28-2008 03:18 PM
It looks like TCP is actually set to default to 24 hours:
http://www.ciscopress.com/articles/article.asp?p=25273&seqNum=5
..and your article confirms that.
I found the verbose switch on the command "show ip nat trans" and that confirmed the 24 hours of persistence in the table.
08-28-2008 03:59 PM
Only active ones.
If you look in the note is says TCP sessions that see a FIN or RST are 1 minute. So if they are closed they will be cleared in 1 minute.
08-28-2008 05:08 PM
Thank-you - great point.
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