I guess I should follow up with the solution.
Sorry, it's been a long day.
The short term soulution was to set up a cron job to
test the link every 5 minutes, and issue a 'clear ip nat trans *'
to the router if the link was down.
The long term solution was to upgrade to IOS v12.0(5.5)T, (v12.0.3T
did not fix the bug on my 2611)
YMMV
Robert
> You've hit on a bug in older versions of IOS's NAT.
> If you 'clear ip nat translations *', the inbound
> NAT will start working again. It has to do with the
> NAT timeout value(default is 24 hours), and poor
> memory managment in IOS v11.x
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