Issue wrt HTTP Monitor

What is the full send string you're using? Can you try an HTTP 1.1 formatted send string like this:

 

 

GET /pingme/return.html\r\nHost: \r\nConnection: Close\r\n

 

 

Depending on which LTM version you are running, the monitoring daemon, bigd, appends one or two \r\n to the end of the send string. You can use tcpdump to check which it is. A valid HTTP GET should have two trailing CRLFs (\r\n's).

 

 

You should always configure a receive string for HTTP(S) monitors. Else, bigd will accept any response--in effect the HTTP monitor becomes just a TCP connection test.

 

 

Here is a recent post which has some tips for configuring an HTTP 1.1 formatted send string and debugging any issues:

 

 

Failing Monitors

 

http://devcentral.f5.com/Default.aspx?tabid=53&view=topic&postid=33381&ptarget=33384

 

 

Aaron