All, I thought of this approach. I will create a service call 'check_public_url' on host1, host2, host3, host4, and etc. Then I would create another check which will use "check_cluster" plugin to check the service status like below ./check_cluster -s check_public_url -d -w 0:50 -c 50:75 Am I approaching the right solution? Please advise on this. thanks <div class="gmail_quote">On Thu, Jul 2, 2009 at 9:20 AM, shadih rahman <<a href="mailto:shadhin71@gmail.com">shadhin71@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">All, I am trying to monitor an url which is load balanced behind csm. I want it go to warnning state if 50% of the servers are unavailable behind csm. Can someone please give me some suggestion how I can achieve this. Thanks -- Cordially, Shadhin Rahman </blockquote></div> -- Cordially, Shadhin Rahman