There are several resources available which show how to configure Alternate Access Mapping (AAM) redirection. A few good ones are here and here. The problem I ran into was, once you are done with the redirection, how do you get rid of it? This required an e-mail to a Microsoft colleague who quickly provided the answer. As always, the solution is simple once you know what it is 🙂
To remove AAM redirection, issue the stsadm addzoneurl command and omit the redirectionurl. Here's a brief example of setting up and removing AAM redirection:
stsadm -o addzoneurl -url http://new_url -urlzone default -zonemappedurl http://new_url -redirectionurl http://old_url
stsadm -o addzoneurl -url http://new_url -urlzone default -zonemappedurl http://new_url
