GTM HA sync

For reasons I don't understand, DNS uses a different HA/sync method than the rest of the BIGIP world.

You can read up on it for example here: https://support.f5.com/csp/article/K13734 here: https://techdocs.f5.com/kb/en-us/products/big-ip-dns/manuals/product/big-ip-dns-implementations-14-1-0/11.html and here: https://techdocs.f5.com/kb/en-us/products/big-ip-dns/manuals/product/big-ip-dns-implementations-14-1-0/03.html

Hello gersbah,

thanks for your valuable feedback, I have read this document before but I am confused in some points below

-when add standby node as a server at the active node do I will use the self IP of the standby node ?

-gtm_add script give warning as it will erase all configurations? is it mean DNS configurations only or all configurations of the box?

You can using it. It will helpfull to you.

https://agility17dns-docs.readthedocs.io/en/latest/#id14

thanks Hoang,

really it is very useful link

do we have to add the standby node in HA as a different server or just add the self ip of standby node to the same server of active node?

The BIG-IP DNS/GTM training exercise at

https://agility17dns-docs.readthedocs.io/en/latest/

may once have been a true "latest", but as of this writing it is a few

years old, and a couple of details of BIG-IP DNS have changed.

The exercise was based on BIG-IP software Release 12.1.x, but one notable

change to the user interface was incorporated beginning with Release 13.1.0.

When configuring...

DNS >> GLSB : Servers : Server.List >> New.Server

...and you get to the step for adding a BIG-IP device, the old GUI

screen would allow you to choose between a standalone BIG-IP system

and a 2-member DSC (HA) setup, with separate server-type choices:

BIG-IP System (Single)

BIG-IP System (Redundant)  [that is, an HA pair of 2 systems]

With Release 13.0 (and later), the "General Properties/Product" choices

offer only a combined type "BIG-IP System" -- but to the menu was added

a "Devices" section. Within this "BIG-IP System Devices" block there is

a small (and easily overlooked) button marked "Add". When you click this

little button, the webpage pops up a box "Add BIG-IP System Device" for

entering IP addresses and other parameters of one BIG-IP system. The

"Add" function can be invoked multiple times, thus supporting DSC groups

containing more than 2 BIG-IP systems.