iRule URL redirect help required.

Cool, then this shouldn't be horrible. You'd need something like:

when HTTP_REQUEST {
  if {[scan [HTTP::uri] "/%d&%s" dnum action] == 2} {
    HTTP::redirect "http://link.ecm.tn.exp/Livelink/livelink.exe?func=LL.login&username=Anonymous&password=&NextURL=%2FLivelink%2Flivelink%2Eexe%3Ffunc%3Dll%26objId%3D$dnum%26objAction%3D$action"
  } else {
    log local0. "URI: [HTTP::uri] did not match"
  }
}

Keep in mind that this will match any URI with /& format, and if you want to do some more specific checking you could analyze the dnum and action variables once they were set by the scan command to see if the action matches an appropriate action or something to that effect, but it sounds like the URI is something you're controlling anyway, so I wasn't horribly worried about that.

Let me know if that works, and/or if you have any further questions.

Colin