Comment 3 for bug 2063989

This don't looks like Neutron bug really and more like some misconfiguration or something like that. If You can't reach metadata service from Your instance, please check if haproxy service for metadata was spawned in the router namespace. You need also to check e.g. with tcpdump where your connection is stopped. That may give you some clue what and where is wrong.

I am closing this as not a bug in Neutron and recommend You to go the the <email address hidden> mailing list to get support there.