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Forum Discussion

nikhil_raj_2965's avatar
nikhil_raj_2965
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Jul 23, 2018

irule vs LTM policy

If I have an irule & an LTM policy configured on the same virtual server, which will be processed first Regards Nikhil  
application delivery
iRules
LTM
Samir_Jha_52506's avatar
Samir_Jha_52506
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Jul 23, 2018

As per my understanding F5 validate the VIP setting as per defined configuration (Top to Bottom). In that iRule comes prior then policies. So, I will go with iRule first.

 

But both has unique feature...

 

  • Local Traffic Policies are faster if performance is an issue
  • iRules are more flexible and you can get help from DC people
Samir_Jha_52506's avatar
Samir_Jha_52506
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Jul 23, 2018

In your setup could be traffic match per policy condition.

 

For support events such as HTTP_REQUEST & HTTP_RESPONSE; LTM policy evaluation occour before iRule. This means that's possible to write iRule to override an LTM policy decisions.

 

Cheers...