irule for bandwidth alert or active connection alert

I'm not totally clear on the use case, but it sounds like you're looking for a box-total style alert. If so, look here for starters:

 

 

http://support.f5.com/kb/en-us/solutions/public/6000/400/sol6414.html?sr=13124358

 

-and for custom traps,

 

http://devcentral.f5.com/Default.aspx?tabid=63&articleType=ArticleView&articleId=256

 

 

If you're looking for per-connection information you may consider the TCP::bandwidth command from an iRule.

 

 

-Matt