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Hi Anil,

What you quoted is about L3 management and bridging and the need of 
flexibility. It means that the physical NIC will have a whole bunch of 
IP addresses, one per Quantum router you define.

Should you want to deploy a Controler on that node, you would need to 
have a second NIC with external access (what is called "API Network" in 
the docpage Simon quoted).

There is also need for "Data Network" with ideally a third NIC (if you 
want to provide separate IP ranges for API and data network) but you can 
bypass that in a lab environment by assumpting that your data network IP 
range is externally reachable and consequently the management IP of the 
controler/network node is the public IP (for the API purpose) (here, 
NIC2 IP address)

Is it clearer ?

-Sylvain



Le 18/04/2013 21:00, Anil Vishnoi a écrit :
> Re-sending it, with the hope of response :-)
>
> ---------- Forwarded message ----------
> From: *Anil Vishnoi* <vishnoianil at gmail.com 
> <mailto:vishnoianil at gmail.com>>
> Date: Thu, Apr 18, 2013 at 1:59 AM
> Subject: [Openstack][Quantum] Query regarding floating IP configuration
> To: "openstack at lists.launchpad.net 
> <mailto:openstack at lists.launchpad.net>" <openstack at lists.launchpad.net 
> <mailto:openstack at lists.launchpad.net>>
>
>
>
> Hi All,
>
> I am trying to setup openstack in my lab, where i have a plan to run 
> Controller+Network node on one physical machine and two compute node. 
> Controller/Network physical machine has 2 NIc, one connected to 
> externet network (internet) and second nic is on private network.
>
> OS Network Administrator Guide says "The node running quantum-l3-agent 
> should not have an IP address manually configured on the NIC connected 
> to the external network. Rather, you must have a range of IP addresses 
> from the external network that can be used by OpenStack Networking for 
> routers that uplink to the external network.". So my confusion is, if 
> i want to send any REST API call to my controller/network node from 
> external network, i obviously need public IP address. But instruction 
> i quoted says that we should not have manual IP address on the NIC.
>
> Does it mean we can't create floating IP pool in this kind of setup? 
> Or we need 3 NIC, 1 for private network, 1 for floating ip pool 
> creation and 1 for external access to the machine?
>
> OR is it that we can assign the public ip address to the br-ex, and 
> remove it from physical NIC? Please let me know if my query is not clear.
> -- 
> Thanks
> Anil
>
>
>
> -- 
> Thanks
> Anil
>
>
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