Forum Discussion
hooleylist
Jul 16, 2009Cirrostratus
If you add an HTTP profile to a virtual server, LTM will try to parse the HTTP headers before opening / reusing an existing serverside connection. So HTTP_REQUEST is triggered once the HTTP headers are parsed. If you force buffering of the request payload with HTTP::collect, then LTM will collect the payload. HTTP_REQUEST_DATA is triggered once the amount of data specified in the HTTP::collect command has been collected. If you do not force buffering of the payload, LTM will send the request to the pool member after HTTP_REQUEST without buffering the payload and HTTP_REQUEST_DATA will not be triggered.
For more info you can check the events wiki page or reply here
iRule events
http://devcentral.f5.com/wiki/default.aspx/iRules/events
Aaron