Application administrators are reporting that nodes different from those configured in the pool are selected. The use of an iRule is suspected. How…

To verify if an iRule is affecting traffic for a specific virtual server, an administrator needs to check which iRules are associated with it. An iRule can contain logic to select a pool or node, overriding the virtual server's default pool. The list /ltm virtual TMSH command displays the virtual server's configuration, including a "rules" section listing all applied iRules. In the GUI, navigating to the virtual server's properties and selecting the "Resources" tab shows the same list of assigned iRules.

Via TMSH with the list /ltm rule command.: This command shows the content of a specific iRule but does not show which virtual server it is applied to.

Via the GUI at the iRule tab for the virtual server.: There is no "iRule tab" on the virtual server properties page; iRules are managed under the "Resources" tab.

1. F5 Networks. (2021). Traffic Management Shell (tmsh) Reference Guide. Section: ltm virtual. The reference for the list /ltm virtual command shows that the output includes the rules attribute, which lists associated iRules.

2. F5 Networks. (2021). BIG-IP System: Getting Started Guide. Chapter: Virtual Servers. The guide's screenshots and instructions for configuring a virtual server show that iRules are assigned on the "Resources" tab of the virtual server's properties page.

3. F5 Networks. (2021). BIG-IP LTM Concepts. Chapter 11: iRules. "You manage iRules on a virtual server by way of the Resources tab on the Virtual Server screen."