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

sathish_126179's avatar
sathish_126179
Icon for Nimbostratus rankNimbostratus
Mar 30, 2014

ZoneRunner Replication

We have implemented master DNS using F5 GTM zonerunner. There are 3 slave DNS servers out of which 2 are running in Linux Bind and one acting as F5 GTM slave. Any DNS records entered in F5 GTM master...
design
IheartF5_45022's avatar
IheartF5_45022
Icon for Nacreous rankNacreous
Apr 01, 2014

Are there firewalls between the master and slave servers?

It sounds as though notifications from master to slaves are not working and so it's falling back to slaves polling the master. This could be down to a firewall not allowing the notifications through but allowing the polling?

You need to debug why notifications are not working (if not firewall reason). Start by running tcpdump on the master GTM as you make zone file updates;-

tcpdump -i0.0 -s0 -XX dst-ip \ or dst-ip \