How to enable logs on LTM if http profile is not used

There's a few ways to do this:

1. An iRule - if you want to be very specific about what you log, you can issue an HSL log statement within an iRule. Example:

   when CLIENT_ACCEPTED {
       set hsl [HSL::open -proto UDP -pool syslog-pool]
   }
   when HTTP_REQUEST {
       switch -glob [string tolower [HTTP::uri]] {
           "/app1*" {
               HSL::send $hsl "<134>User accessing /app1 from [IP::client_addr]"
           }
           "/app2*" {
               HSL::send $hsl "<134>User accessing /app2 from [IP::client_addr]"
           }
       }
   }
   

2. A request logging profile - under Local Traffic - Profiles - Other - Request Logging, create a request logging profile that details what data you want captured and what syslog pool you want it sent to. This is quite a bit more brute force than the iRule approach, so maybe not entirely what you're looking for. Here's some additional information on the request logging profile nonetheless:

   http://support.f5.com/kb/en-us/products/big-ip-aam/manuals/product/aam-implementations-11-4-0/20.html?sr=33764514