I was working on some IP SLA problems this evening and needed to clear the ip sla statistics output. Thinking there should be a clear ip sla statistics command I was wrong!
I was about to remove the config and re-apply it and then found the answer!
In the configuration parser issue the command “ip sla restart <ID>”
Enter configuration commands, one per line. End with CNTL/Z.
R7(config)#ip sla restart ?
<1-2147483647> Entry Number
so in my example all I had to do was ip sla restart 1
Failures reset to zero!
R7#sh ip sla statistics
Round Trip Time (RTT) for Index 1
Latest RTT: 1 milliseconds
Latest operation start time: 15:11:25 UTC Wed Jul 31 2013
Latest operation return code: OK
Number of successes: 3
Number of failures: 0
Operation time to live: 3588 sec