Monitor when set HTTP server shows down but when I set it to TCP it works

IF this is still an open item, pls share us the below results,

• The http monitor set on the pool.

tmsh list ltm monitor http 

• Do a curl.

curl -kv http://:/monitor/bigip.html

Here /monitor/bigip.html is just an example, you should replace it with your send string path, whichever you have set.