Question on Select_pool_member_based_on_ HTTP_query_string_parameter iRule

So it looks like the member selection is succeeding in that the .65:80 member is selected for both requests. Is that what you're seeing?

Is it possible that the application isn't handling the manually inserted parameter name/value? You could test this by removing it from the URI in HTTP_REQUEST before the request is sent to the pool member:

    Use a workaround to parse the parameter value from the query string
    described on http:// devcentral.f5.com/wiki/default.aspx/iRules/uri__query
   set param_value [URI::query "?&[HTTP::query] "&$member_param"]
    Save a copy of the URI with the param and value removed
   set uri [string map [list "$member_param=$param_value" ""] [HTTP::uri]]
    Replace && with & in the updated query string if && is present and set the URI to this
   HTTP::uri [string map "&& &" $uri]

Aaron