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RonaldV_224653's avatar
RonaldV_224653
Icon for Nimbostratus rankNimbostratus
Nov 05, 2015

ACE to LTM probe/monitor hash equivalent?

Hello All,

 

Recently we moved from our ace's to f5's for the loadbalancing. Everything works fine but have one issue at the moment i can't seem to figure out. On the ace we had a hash check on our probe to see if the content of the checked-page is changes. Ifso -> Down. On the F5's I can't seem to figure it out..

 

Our health monitors at the moment look like:

 

Send string GET /something/loadbalancer.html HTTP/1.1\r\nHost: \r\nConnection: Close\r\n\r\n

 

Receive String 200 OK

 

The problem with this is if IIS has a custom 503 error page for example it still receives a 200 OK.. so he thinks it is still alive.

 

Thanks in advanced for thinking with me.

 

application delivery
design
LTM
monitor

1 Reply

  • cjunior's avatar
    cjunior
    Icon for Nacreous rankNacreous
    Nov 05, 2015

    Hi,

     

    Why do you not change the content of "receive string" to something that exists only when is a real successful request (e.g. welcome, hello)? Otherwise, you can flag the monitor as reverse and set "Error" in the receive string value. This field is a regex, so, you can do something more complex.

     

    Just some tips, Regards