To avoid DHCP race conditions, we've split our network and create a separate 
network/scope - such that only cloudstack dhcp is served out cloud network.

> -----Original Message-----
> From: David Ortiz [mailto:dpor...@outlook.com]
> Sent: Monday, August 05, 2013 2:46 PM
> To: users@cloudstack.apache.org
> Subject: RE: IP Address assigned by CS is not passed to new instance VM
> 
> Cindy,
>       Just as a heads up, if you have two DHCP servers configured (e.g. 
> external
> DHCP server and virtual router on the same network), there's no guarantee
> which one will assign the IP address.  Both will try, but only one will 
> succeed.
> If you can, add a filter to the external DHCP address which will ignore any
> DHCP request with a MAC address from cloudstack.  This is what we had to
> do to get our VMs to come up correctly.
> Thanks,     David Ortiz
> 
> > Date: Sat, 3 Aug 2013 01:22:31 +0100
> > Subject: Re: IP Address assigned by CS is not passed to new instance
> > VM
> > From: davest...@gmail.com
> > To: users@cloudstack.apache.org
> >
> > Why do you have ONBOOT="no"?
> > That's explicitly telling the interface not to come up on boot, which
> > seems a little odd.?.
> >
> > Best regards,
> > David Comerford
> > ------------------------
> > Tel: +353 87 1238295
> > Email: davest...@gmail.com
> > Website: http://dave.ie
> > GPG key: http://gpg.dave.ie
> >
> >
> > On 1 August 2013 22:24, Cindy Jiang <cji...@infoblox.com> wrote:
> >
> > >   Hello,
> > >
> > >  We are trying to create a new instance with basic networking setup
> > > using CentOS 6.0 ISO. Cloudstack assigns the correct IP Address (in my
> case:
> > > 10.60.176.110) to this new centOS instance, but once you log into
> > > this VM, check "ifconfig" and
> > > "/etc/sysconfig/network-scripts/ifcfg-eth0", the IP Address and default
> gateway information are not passed through correctly.
> > > The same issue with hostname - instead of "centos-107", it shows as
> > > "localhost.localdomain". Please see attached screenshots. Has anyone
> > > experienced the similar issue?
> > >
> > >  Our environment:
> > >
> > >    1. CS 4.2
> > >    2. XenServer 6.0.2
> > >    3. CentOS 6.0 ISO
> > >
> > > Thanks,
> > > Cindy
> > >
> 

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