I sync from the primary GTM to secondary, this mark sync but the secondary not see change
Are you using gtm_add? or did you do an HA pair of GTM's?
You can't create a sync group the way you would with LTM's.
HERE is some info to get you started.
And HERE is some supplemental info to help you get it configured!
Hope that helps! If it does please up-vote and select this answer, it'd be greatly appreciated!
in DNS > Settings > GSLB > General te group is default
I agree with Dylan. If you are setting up a GTM sync group with the gtm_add command, try troubleshooting using the iqdump command and checking /var/log/gtm.
Please select and up-vote his answer!
Is the synchronize box checked on both devices?
It should be at the top under DNS>Settings>GSLB>General
Did you look through both of those link I sent you?
thanks the command gtm_add worked