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john4665f5's avatar
john4665f5
Icon for Nimbostratus rankNimbostratus
Apr 26, 2016

Default HTTP/HTTPS monitor acceptable HTTP status codes?

Hello,   I've been digging through F5's LTM documentation, but I am not able to find anything solid on the default acceptable HTTP/HTTPS monitor status codes. What is the LTM expecting back using ...
application delivery
LTM
Theo_12742's avatar
Theo_12742
Icon for Cirrus rankCirrus
Apr 26, 2016

While it's not well documented, the HTTP monitor will accept any response (including 302's). However, you can control this behavior by using RegEx in the Receive String. For example, I use the following (and use HTTP >= 1.0):

 

^HTTP.1\.[0|1]\s([2|3][0-9][0-9])

Which marks the monitor as up for any HTTP code 200-399.

 

Theo_12742's avatar
Theo_12742
Icon for Cirrus rankCirrus
Apr 26, 2016
If that's the case, then I'll point you to the LTM monitors reference (https://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/ltm-monitors-reference-11-5-0/3.htmlunique_475041279): "Note: If you do not specify both a Send String and a Receive String, the monitor performs a simple service check and connect only."