LTM 11.6 how to bind an ip address to logs sent to the remote sysolg server using "syslog include" statement

Hi to everyone,

as in title, I need to bind the ip address on management interface to the logs that are sent to the remote syslog server. I use the 'syslog include' statement as following:

include "

   filter filtra_i_log_a_fan1 {
     level(warn..emerg);
  };

   destination FAN1 {
     udp(\"192.168.xxx.xxx\"port(514));
  };

   log {
     source(s_syslog_pipe);
     filter(filtra_i_log_a_fan1);
     destination(FAN1);
  };
  "

with the configuration above, the ltm binds the logs with ip address of external interface.

thanks in advance

giorgio