We have a spec for implementing a DHCP relay agent [1], which would enable 
this.  We have implemented this, but it's not upstream (yet!). You would have 
to download our adapter [2] and dissect it to get the code from there, which 
may be pretty painful, because the package includes lots of changes related to 
our integration rather than just the relay.

The adapter uses ISC dhcrelay, but we had to patch it to add the link selection 
option. That code is also included with the adapter package, along with a build 
script for it.

[1] https://blueprints.launchpad.net/neutron/+spec/dhcp-relay
[2] https://www.infoblox.com/products/private-hybrid-cloud/openstack-adapter

From: Erhan Ekici <erhan.ek...@gmail.com<mailto:erhan.ek...@gmail.com>>
Reply-To: "OpenStack Development Mailing List (not for usage questions)" 
Date: Tuesday, January 6, 2015 at 9:00 AM
To: foss geek <thefossg...@gmail.com<mailto:thefossg...@gmail.com>>
Cc: "OpenStack Development Mailing List (not for usage questions)" 
openstack <openst...@lists.openstack.org<mailto:openst...@lists.openstack.org>>
Subject: Re: [openstack-dev] [Openstack] [Devstack][Neutron]Neutron with 
External DHCP server


As far as I know, there is a spec and feature for external dhcp server 
configuration but just for ironic project (bare metal installation).
Btw, I have not tested it yet.



On Tue, Jan 6, 2015 at 1:04 PM, foss geek 
<thefossg...@gmail.com<mailto:thefossg...@gmail.com>> wrote:
Dear All,

Is it possible to configure neutron to take VM ip from external DHCP server?

I am having All In One openstack env deployed using devstack icehouse. I am 
looking for an option to integrate it with external DHCP server.

Thanks & Regards
E-Mail: thefossg...@gmail.com<mailto:thefossg...@gmail.com>
IRC: neophy
Blog : http://lmohanphy.livejournal.com/

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