ECV Health Monitor issue

Shall we need to create three Health Monitor and associate specific host value health value in each health monitor.

i understand it depends on how web server is configured. blank host header value (Host: ) or virtual server's FQDN may also work.

Now the issue is when these real servers URL are down( Real server IPs are rechable from BIG IP but the Real server URLS are not accessible still the Pool members are showing healthy ( i.e. up ).

do you have tcpdump when the issue was happening?

Troubleshooting Ltm Monitors by Aaron