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 I am using a HA Liberty multi node setup with Neutron DVR using OpenVSwitch on the back-end

Please, elaborate how you configured HA on Liberty ?
The best option ( if possible ) your detailed landscape setup to be provided in question.

Using field as comment
Quoting :-

 I am using a HA Liberty multi node setup with Neutron DVR using OpenVSwitch on the back-end

Please, elaborate how you configured HA on Liberty ?
The best option ( if possible ) your detailed landscape setup to be provided in question.

You are not answering the question HOW you implement HA setting up 3 Controller nodes 
and having single  Network node ?

Mentioned post of Eduardo Gonzalez http://egonzalez.org/configure-neutron-dvr-openstack-liberty/
doesn't provide any HA solutions , it is just abou DVR.

Using field as comment
Quoting :-

 I am using a HA Liberty multi node setup with Neutron DVR using OpenVSwitch on the back-end

Please, elaborate how you configured HA on Liberty ?
The best option ( if possible ) your detailed landscape setup to be provided in question.

You are not answering the question HOW you implement HA setting up 3 Controller nodes 
and having single  Network node ?

Mentioned post of Eduardo Gonzalez http://egonzalez.org/configure-neutron-dvr-openstack-liberty/
doesn't provide any HA solutions , it is just abou about DVR.

Using field as comment
Quoting :-

 I am using a HA Liberty multi node setup with Neutron DVR using OpenVSwitch on the back-end

Please, elaborate how you configured HA on Liberty ?
The best option ( if possible ) your detailed landscape setup to be provided in question.

You are not answering the question HOW you implement HA setting up 3 Controller nodes 
and having single  Network node ?

Mentioned post of Eduardo Gonzalez http://egonzalez.org/configure-neutron-dvr-openstack-liberty/
doesn't provide any HA solutions , it is just about DVR.

    Generally in HA configuration 3 Controller/Network nodes are supposed to be involved, due to Neutron Server and all neutron agents running on this nodes should have access to MariaGalera DB instances running MultiMaster Synchronous replication  and your answer seems to be completely missing this point. The Galera DB might experience deadlocks due to attempts to update same record on different nodes, which is resolved by selecting a victim transaction and rolling it back.