F5 BIG-IP DNS (GTM) iQuery Protocol Overview

Jason Rahm introduces the iQuery protocol utilized by F5 BIG-IP DNS systems to exchange system configuration and performance metrics.

[HasmadiHadi]

great explanation, i watched few times to get more understanding. i run GTM / LTM lab and try disable/enable remove/add to see the effect before making any changes in production.

[seanmcguire]

Enjoyed the video and impressed at your ability to write backwards so easily!

[luisangelrivera]

Thank you for the informative video! I am new on F5, have some experience with LTM but none with DNS, I notice that F5 puts a lot of emphasis on the 3 steps to synchronize iQuery communication, and the big3d agent is crucial for this. However, I really would like to know what big3d agent IS or which information it collects, is there any devcentral page with this info? Thank

[vishalmishra]

Awesome explanation and very informative. Thanks for sharing.

[Audit]

How to identify which physical interface it will use? Mgmt or tmm

[pjninja]

When talking about iQuery between a GTM and an LTM, which device *initiates* the iQuery connection? Does the GTM initiate the iQuery to the LTM or does the LTM initiate the iQuery to the GTM? This affects how we open our firewall rules to allow iQuery.

[geneva]

Thank you so much for this video. I'm bringing up a whole new GTM infra with 4 BigIP DNS boxes broken up into two HA pairs. with all 4 devices having a clean config, do I need to run the bigip_add and the gtm_add in each device to the other 3?

[md.mahmudhasan]

big3d_install and bigip_add command both do cert exchange but I am confused what would be the order here. Also if we are adding a new gtm in the sync group, do i need to run the bigip_add command from the existing gtms or gtm_add command from the new gtm box will do that for us?

[GC-ukdl]

there is redundant command : bigip_add. According to K13312 if you do big3d_install the certs are exchanged also . Done .
bigip_add is redundant action if you do big3d_install. bigip_add you can use if you already know that you have the same big3d version on all systems.

[rafaayala]

Please explain how to setup a CAA record in bigip DNS GTM

[danieldossantosalves]

Hi Guys,
I need to implement 4 gtm boxes, each pair on each site, first the 4 boxes must be on the same sync group or each pair in one group ?

Is it necessary a communication between gtm boxes on different sites ?

[hoanghung]

Hi guy
I have config GTM between F5 DNS and LTM.
Whe we config server, using heath monitor : Bigip,
>>> Error: Monitor /Common/bigip from /Common/ltm_hostname : no reply from big3d: timed out
Please help me

[y.h]

didn't explain what is the real purspose of iquery between GTM and LTM and what I will lose if I have 3rd party load balancer and iquery between GTM and 3rd party load balancer doesn't exist.