In a few labs (v2-lab8-task5.5, for instance) there is an sla monitor is used to do some testing. But check this out....
R6(config-sla-monitor)#type udpEcho dest-ipaddr ?
Hostname or A.B.C.D IP address or hostname, broadcast disallowed
It seems that broadcasts are no longer allowed. I'm using 12.4(16a). Any suggestions?