Re: will IP assigned to a guest VM(via DHCP) ever expiry or will need renewal...?

[Alena Prokharchyk]

On 7/24/12 7:53 AM, "Ram Ganesh" <ram.gan...@citrix.com> wrote:

>Hi All,
>
>Would like to know if an IP assigned by CloudStack via its DHCP server to
>a guest VM will ever expire? Or is it ok to assume the IP will be
>assigned to a guest VM as long as it is not destroyed. We are exploring
>means to enhance our load balancer to support DHCP and once we acquire an
>IP we would assign it statically to the load balancer device. Please let
>me know
>
>Thanks,
>Ram
>
>


It will not expire in most of the cases - the IP will stick to Vm for the
entire lifecycle as the cidr for the network doesn't change once its set
usually. 

But if external device (Netscaler, Juniper SRX) is used as a provider for
the network, then the cidr for the network is calculated dynamically every
time the network gets shutdown/re-implemented. As the CIDR changes, so do
all the user vms' ips.

Sheng, please confirm.

-Alena.