A fun, but not well known, feature on BIG-IP is the Statistics Profile. This tech tip is the second in a series on how the Statistics Profile and iRules, when working together, can save time, product...
Would love to see the final product. Ours also does validation against the keepalives so that once keepalives < 1 it goes to maintenance too. The final version could be used to give user maintenance control and also prevent the "ugly" page cannot be found when all keepalives are down.