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From sebastien goasguen <>
Subject Re: use an existing network
Date Fri, 11 May 2012 18:59:58 GMT
Thanks Geoff,

I read your blog entries, including:

They are quite nice. I will try to setup a basic networking zone,
without security groups.
I should be able to do this without using the API, right ?

It would be nice to be able to enter a fixed IP network for guests
within the gui. Instead of dealing with ranged network. In opennebula
you can specify a list of IP/MAC pairs that can be leased for the VMs.



On Fri, May 11, 2012 at 11:53 AM, Geoff Higginbottom
<> wrote:
> Hi Sebastien
> What you describe can be achieved, but CloudStack will always allocate an IP to a VM.
> It is possible to create a new Network Offering without DHCP, but you still need CloudStack
to allocate an IP to the Guest instance so it can manage it.
> There is a blog article on cover this on an advanced network but the
concepts are the same.
> I would recommend setting an exclusion range on your DHCP server then setting this as
the guest range in CloudStack.
> You also need to create a Zone using Basic Networking but without security groups, so
you will need to cancel the wizard and create it manually from the infrastructure tab and
ensure you choose no security groups, this will place all your guest instances directly onto
your network.
> Regards
> Geoff
> ShapeBlue Ltd
> On 11 May 2012, at 15:03, "sebastien goasguen" <> wrote:
> Hi,
> I want to deploy a very basic CS infrastructure.
> I have a single physical network (basic lan). I do not have access to
> the switch and can't configure vlans.
> I have a DHCP server not managed by CS, the firewall is also
> independent from CS.
> I want all traffic (management, guest, storage, system etc..) to go
> through the same network, no isolation at all.
> The VMs will get an IP from the DHCP server and be bridged normally on
> a single bridge (no vlan taggin).
> The VMs IP will be in the same range than the hypervisors.
> I am having trouble setting this up via the management UI, because the
> various networks expect a different range, or a different network.
> Is this doable ?
> Ps: If this list is for announcements rather than questions let me
> know, I will post in the forums.
> Thanks,
> --
> ---
> Sebastien Goasguen
> ShapeBlue provides a range of strategic and technical consulting services to help IT
Service Providers and enterprises to build a true IaaS compute cloud. ShapeBlue’s expertise,
combined with CloudStack technology, allows IT Service providers and enterprises to deliver
true, utility based, IaaS to the customer without reengineering existing physical, virtual
or storage layers.
> ________________________________
> This email and any attachments to it may be confidential and are intended solely for
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Sebastien Goasguen, Associate Professor
Clemson University, USA

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