LTM External Monitors: The Basics
LTM's external monitors are incredibly flexible, fairly easy to implement, and especially useful for monitoring applications for which there is no built-in monitor template. They give you the ability...
Published Jan 25, 2008
Version 1.0
There is another updated post on EAVs that I put up last year: http://devcentral.f5.com/Tutorials/TechTips/tabid/63/articleType/ArticleView/articleId/1086366/A-Brief-Introduction-To-External-Application-Verification-Monitors.aspx
It doesn't address route domains, but has more information on the topic.