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Recently I'm test floating IP on version Grizzly, I found the mechanism of
floating IP is a little of wasting public IP addresses.

In some circumstance, like public cloud environment. there is only one user
in one project (tenant). If the user want to using floating IP,  he has to
create an router and set a gateway for it, this process  will occupy one
additional public IP address. So the whole process of floating IP will use
2 public address at least.

So my question is, are there any ways to avoid this?

Thanks
Ray
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