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Forum Discussion

Paul_Lancashire's avatar
Paul_Lancashire
Icon for Nimbostratus rankNimbostratus
Apr 10, 2006

GTM iRules

Hi,

 

 

I would like to start writing irules for dns_requests to the GTM's, that define resolution based upon the source ldns address. For example, resolve internal addresses of pools of LTM Vs's if the request is known to come from an internal ldns server, or resolve translated addresses of a pool of LTM's vs's if internet ldns.

 

 

How easy is it to set extra options, such as load-balancing method, fallback hosts, and persistence in those rules?

 

 

Does anyone have experience of writing such rules, or any extended information that may help?

 

 

thanks.
application delivery
dev
devops
iRules

1 Reply

  • Colin_Walker_12's avatar
    Colin_Walker_12
    Historic F5 Account
    Apr 12, 2006
    Setting the persistence type and specifying a specific destination based on certain criteria (effectively acting as a fallback host) are relatively trivial. Changing the load-balancing method isn't something that's currently available in iRules, but you can forgoe the load balancing decision and direct traffic to the location of your choice by making decisions in the iRule itself with the information available.

     

     

    Colin