Open Stack

Hi All,
I have a multi node openstack setup with one controller+neutron node 
and other compute node.

As specified in this link:

https://openstack.redhat.com/Neutron_with_existing_external_network

network restart takes destroys and recreates br-ex which causes the 
router's interface in the qrouter-* netns to be deleted, and it won't be 
recreated without clearing and re-setting the gateway.

This means whenever I do network restart I need to recreate external 
subnet and assign new floating IPs to the existing VMs.Is there a way I 
can prevent this?

Thanks,

Priyanka