Hi,

You need a router to bind internal network(s) with external network.

Otherwise you cannot allocate a floating ip (on the external network) to
VMs (on internal network(s)).

The doc[1] explains how to do it.

[1]
http://docs.openstack.org/kilo/install-guide/install/apt/content/neutron_initial-tenant-network.html


Cédric/ZZelle


On Thu, Jul 30, 2015 at 1:08 PM, 于洁 <[email protected]> wrote:

> Hi all,
>       I find that if setting the value of router:external=True for a
> net(example: neutron net-update netID --router:external=True)
>       Users in other tenants could allocate floating IP from this
> net(example: neutron floatingip-create netID).
>       But how could this floating IP bind to a VM created by the user from
> other tenants? The network is unreachable.
>       Or do I misunderstand the function?
>
> Thanks,
> Yu
>
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