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Forum Discussion

eNomineZerum_31's avatar
eNomineZerum_31
Icon for Nimbostratus rankNimbostratus
Sep 11, 2017

Upgrading and Replacing aged GTMs in multiple data centers

Hi all,   I have been tasked to replace two aging GTMs in two separate data centers. They are operating stand alone but are performing zone transfers to each other.   One is being totally decom...
application delivery
BIG-IP DNS
big-ip gtm
software upgrade
Leonardo_Souza's avatar
Leonardo_Souza
Icon for Cirrocumulus rankCirrocumulus
Sep 11, 2017

It is going to be a challenge for you to do this without knowing DNS protocol, and only with LTM knowledge. As GTM functions totally different than LTM.

 

The zone transfer is done automatically by the GTMs, as long as you have the checkbox to synchronize the DNS zone files. In v13 the option is:

 

DNS > Settings > GSLB > General

 

GTM itself is always standalone but can be in a sync group with other GTMs. However, they are all standalone and active.

 

If a new GTM, configure the base config, create the GTM server object in the existing GTM to represent this new GTM, do a gtm_add after. Very import, gtm_add from the new GTM to point to the OLD GTM.

 

If you are replacing a GTM with the same IPs, configure the base config, do a gtm_add after. Very import, gtm_add from the new GTM to point to the OLD GTM. Don't forget to configure the replacement GTM out of the network, and then shutdown the old one and connect the new one.

 

I hope this gives you some ideas. Better you try this in a lab environment before.

 

gtm_add solution:

 

https://support.f5.com/csp/article/K13312