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ParmessanCheese's avatar
ParmessanCheese
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Mar 06, 2024

LTM/GTM HA Configuration

Hi, I would like to seek your help regarding my implementation for F5 Redundant GTM/LTM set up.   I have 1 pair of LTM/GTM appliance running as Active/Standby HA Pair with GTM enabled on both. When...
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Paulius's avatar
Paulius
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ParmessanCheese Would you mind sharing your configuration when HA is in place? Based on what you are stating you might have your F5s configured in active/active and then new device does not have network connectivity so the Virtual Servers it is responsible for are down.

ParmessanCheese's avatar
ParmessanCheese
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Mar 06, 2024

Hi Paulius

 

Thank you very much for your kind response for my question.

 

I have two virtual F5 devices LTM#1 (active) and LTM#2 (standby) in HA pair. Then we decided to activate the GTM license on both devices and plan to configure DNS load balancing. 

 

I started my config on box 1 (LTM#1/GTM#1)

I created data center - "Data_Center_A", then created server "Data_Center_A_Server" and added a device "LTM#1" and it automatically pulled the virtual server list from LTM#1. 

 

But when I added "LTM#2" as the back up device under "Data_Center_A_Server", some of the virtual server went down and I have a feeling that the GTM is communicating with some of the servers on the backup side instead of communicating with the active device since when I rebooted the secondary (backup) device, the virtual servers went up. Then went down again once the backup device went online.

 

Hope this info helps.. :)