Redirecting To Another Application

This seems like it should be really simple, so maybe I'm missing something obvious, but I'm not sure how to redirect to another application from a Webwork 2.1.7 action.

Basically, I need certain result codes to redirect to a separate application, running in the same app server, which handles identity management. What I currently have mapped is something like this:

<action name="foo" class="com.blah.Foo">
  <result name="success" type="dispatcher">/foo.jsp</result>
  <result name="error" type="redirect">http://192.168.0.1/someOtherApp/someSimplePage.jsp</result>
</action>

It seems I need to specify the complete URL in order to redirect to another application, but if I do that then I need to include the IP address, which I don't want to do (it will be different for each environment I deploy to).

What's the correct way to do this?
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