How config IP-SlA in Router cisco by ICMP ping

http://www.firewall.cx/cisco-technical-knowledgebase/cisco-routers/813-cisco-router-ipsla-basic.html

For example

ip sla 1
icmp-echo 192.168.1.1
frequency 50
ip sla schedule 1 life forever start-time now

Ping 192.168.1.1

every 50 second

For life time From now