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Defining Translation Timeouts
The router removes unused dynamic translations
in the translation table. Use the ip nat translation command to change or disable NAT translation
timeouts.
You can set the aging time (in seconds) never)
for any of the specified timers:
- timeout—Dynamic simple translations (not for overloaded
translations); default is 86400 seconds (24 hours).
- dns-timeout—DNS-created protocol translations; default
is 120 seconds. These dynamic translations are installed by the DNS
but not yet used; as soon as the translation is used, the router applies
the timeout value mentioned above.
- udp-timeout—UDP protocol extended translations;
default is 300 seconds (5 minutes).
- tcp-timeout—TCP protocol extended translations;
default is 86400 seconds (24 hours).
- finrst-timeout—TCP connections terminated with reset
(RST) or bidirectional finished (FIN) flags; default is 120 seconds.
This timeout applies only to TCP extended translations. The timer
removes unused, closed TCP translations, which allows for retransmissions.
- icmp-timeout—ICMP protocol extended translations;
default is 300 seconds (5 minutes).
- gre-timeout—Aging time for GRE protocol translations;
default value is 300 seconds (5 minutes)
All timeouts for this command support a maximum
value of 2147483 seconds (about 25 days).
The no version of this command resets the timer
to its default value.
ip
nat translation
- Use to change translation timeouts for existing and newly
created translations in the translation table.
- All timeouts for this command support a maximum value
of 2147483 seconds (about 25 days).
- Example
- host1 (config) # ip nat translation timeout
23200
- Use the no version to reset
the timer to its default value.
- See ip nat translation.
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