F5 is upgrading its customer support chat feature on My.F5.com. Chat support will be unavailable from 6am-10am PST on 1/20/26. Refer to K000159584 for details.

Forum Discussion

Wangzixuan_3147's avatar
Wangzixuan_3147
Icon for Nimbostratus rankNimbostratus
Jan 18, 2019

gtm virtual server status

I have two GTMs in a single group. Each GTM has only one public network address and one link, and one IPS is connected. When the link on gtm is broken, the link will detect the line down, so the virt...
application delivery
BIG-IP DNS
Rico's avatar
Rico
Icon for Cirrus rankCirrus
Jan 18, 2019

Here is an excerpt from the F5 Local Traffic Manager and DNS Operations Guide.

 

In order to monitor the health of objects in the configuration, BIG-IP DNS devices in the synchronization group sends monitor requests using iQuery to another iQuery server that is closer to the target of the monitor. All BIG-IP DNS devices in the synchronization group agrees on which BIG-IP DNS is responsible for initiating the monitoring request. The result of the monitoring request is sent by the iQuery server to all BIG-IP DNS devices connected to it that are participating in the synchronization group.

 

This shows that each gtm is responsible for certain virtual servers and will not send a monitoring request if that virtual server is shown as down. In your case, this means that as long as the BIG-IP DNS devices are in sync, the virtual server status will be consistent among all of the BIG-IP DNS devices so your virtual server would show as down.

 

If you have any more questions, I am sure I can help.