F5 LTM 11.3.0(3144) - Syslog remote server problems

can you try something like this?

root@(ve11a)(cfg-sync In Sync)(Active)(/Common)(tmos) list sys syslog include
sys syslog {
    include "
filter f_remote_loghost {
  level(crit..emerg);
};
destination d_loghost {
  udp(\"172.28.24.1\" port(514) localip(172.28.24.11));
};
log {
  source(s_syslog_pipe);
  filter(f_remote_loghost);
  destination(d_loghost);
};
"
}