Comment 5 for bug 1404809

Agree with Igor, the patch https://review.openstack.org/#/c/142136/ will help.
Also common deployments without that fix aren't affected by the issue: it's impossible (and unnecessary) to set gateway for 'storage'/'management' network in UI.
But, if someone attempts to use 'multiple-cluster-networks' feature (available only for clouds with Neutron+Gre networks) he will get broken routing to Internet on nodes with 'public' networks (by default controller nodes): they wont be accessible via public IP and will try to reach Internet hosts via gateway in 'storage' network. However, at the same time Internet on nova instances and floating IPs will work fine, because routing inside Neutron's router namespace will be correct.