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From Sowmya Krishnan <>
Subject RE: DHCP IP range in the isolated network
Date Thu, 14 Feb 2013 15:43:29 GMT
With IP range reservation, one can reserve a range of IPs in the network that's to be used
for dhcp and reserve some for non-CloudStack purposes. But the new CIDR should be subset of
the existing CIDR.
I think Fabrice is talking about modifying the network CIDR but not within that subnet...?

-----Original Message-----
From: S.M Basha [] 
Sent: Thursday, February 14, 2013 8:49 PM
Subject: Re: DHCP IP range in the isolated network



On Thu, Feb 14, 2013 at 7:52 PM, Sowmya Krishnan <
> wrote:

> Option of specifying custom dhcp range is available while creating a 
> new guest network - You can specify custom guest gateway and network 
> during network creation that would override the default zone level 
> CIDR. But this is not allowed if you choose a network offering that 
> uses external devices (like Netscaler for example). The CIDR is 
> generated by CloudStack in that case.
> For existing network, I think updateNetwork API does provide an option 
> to change cidr. But if you already have running VMs in the network, I 
> am not very sure of the behavior in that case.
> -----Original Message-----
> From: Fabrice Brazier []
> Sent: Thursday, February 14, 2013 6:41 PM
> To:
> Subject: DHCP IP range in the isolated network
> Hi Folks,
> By default the guest CIDR for the advanced zone is and the 
> dhcp ip range is on the entire subnet.
> Does it possible to modify the default dhcp ip range in this isolated 
> network ?
> Thanks,
> Fabrice

Thanks & Regards

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