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nabf5guy's avatar
nabf5guy
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Apr 30, 2024

BIG-IP DNS iRule issue with static variable

I am trying to develop an iRule bypassing DNS processing when a DNS request matching a wide ip comes via a specific listener on our BIG-IP DNS. Code is below: when RULE_INIT { set static::u...
application delivery
dns
multi-cloud
  • nabf5guy's avatar
    nabf5guy
    Apr 30, 2024

    Okay, figured out the issue with the static variable.

    If your iRule is a GTM iRule, not an LTM iRule, you need to declare static variables in a fully qualified manner, e.g. 

    set ::static::some_variable_name

    and then call them in a fully qualified manner, .e.g 

    $::static::some_variable_name

    It pays to go back and re-read even the documentation that you think you are familiar with.