Looks like check_icmp has been enhanced by the op5 team but those enhancements haven't made it back into the plugins project.
http://git.op5.org/git/?p=nagios/op5plugins/check_icmp.git;a=blob;f=check_icmp.c;h=f559ea29c1991050519ab7093c3a7e1fe6606508;hb=HEAD Just briefly looking at the op5 version it has much better help output and when trying it the intervals work as one would expect. Perhaps it might be a good idea to pull in their version. -- Reply to this email on GitHub: https://github.com/monitoring-plugins/monitoring-plugins/issues/1238
