Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

Forum Discussion

paulpatriot_129's avatar
paulpatriot_129
Icon for Nimbostratus rankNimbostratus
Aug 24, 2017

irule sending to wrong pool when should be going to default pool defined in GUI

I have a question we currently have an irule to forward specific traffic to a pool of servers and then the GUI set to another pool. The problem were seeing is intermittently traffic is going to the ...
application delivery
irules
LTM
Kai_Wilke's avatar
Kai_Wilke
Icon for MVP rankMVP
Aug 24, 2017

Hi Paul,

you may turn on OneConnect on your Virtual Server to enable per HTTP-Request balancings and automatic failbacks to the default pool after each single request (as already explained by Nathan).

If OneConnect is not suitable for your environment/application, then you could specify the default_pool within an 

} else {
clause...

when HTTP_REQUEST {
    if { ( [HTTP::uri] starts_with "/test1/" )
      or ( [HTTP::uri] starts_with "/tester2/" )
      or ( [HTTP::uri] starts_with "/tester3/" ) } then {
        pool test_pool
    } else {
        pool default_pool
    }
}

Note: For further reading on this topic you may check out K9800 [click me]

Note: If you've already enabled OneConnect and running BIG-IP 11.5.3 HF2, and 12.0.0 through 12.0.0 HF3, them you may be a victim of OneConnect related bug [click me]

Cheers, Kai