Open Stack

Hi,
I have done a kilo ubuntu installation of openstack. One thing i noticed
was the network node's external interface is unnumbered. Then how does the
external router forwards the packet to the network node? Suppose a vm has a
floating ip . I send a packet to that vm using the floating ip. The nat
happens at the network node. How does the packet reached the network node
as there is no ip assigned to the interface. I have not configured dvr and
l3 agent is running on network node.

Thanks,
Akshay
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