Hi, We are a team attempting a PoC on Openstack with a single node deployment to start with. It currently has Keystone, Glance and Nova enabled.
As a part of this PoC, we learnt that Openstack with Nova-network in FlatDHCP mode, uses two subnets on the Host machine: - Public Subnet for floating IPs : o Openstack manages the mapping of floating to fixed IPs for VMs. o VMs are not aware of the additional public IP assigned. - Private Subnet for Fixed IPs: o Openstack boots up the VM with this IP address and VM is aware of it o BR100 created to manage the VMnet fabric for traffic on this subnet. Few Queries: ---------------- -For applications on such a setup that use IP-sensitive protocols like SIP, how do we handle the scenarios? Are we expected to have SIP ALG to do additional SIP based NAT'ng apart from what nova-network manages? -Does this NAT'ng of Floating to Fixed IP not really pull down the performance overall? -What if I need my VMs to be spawned on a public subnet for general accessibility "without any NAT'ng" involved? Is there anyways Openstack can help? Thanks, Best Regards, Rekha
_______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : openstack@lists.launchpad.net Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp
