Hi zhuna
I think carl means that there is not need dynamic route protocol here,
arp proxy is enough, but i have a concern here, upstream router should have a
mechanism to let private gateway ip address as arp source protocol address,
since fg device has private ip address?
At 2016-08-03 15:22:15, "zhuna" <juno....@huawei.com> wrote:
Hi Carl,
IMO, if the upstream router has the route to floating ip subnet, no need to
assign additional IP address to the router.
For example, there are 2 subnets in external network,
Subnet1: 10.0.0.0/24 (fg ip address)
Subnet2: 9.0.0.0/24 (fip)
Suppose assign fip 9.0.0.10 for vm1, and the fg ip address is 10.0.0.10, so
there are 2 ip address configured in fg, one is 9.0.0.10 and 10.0.0.10.
+-------------------+
| router ns |
+-------------------+
| fg (10.0.0.10, 9.0.0.10)
|
|
| router-if (10.0.0.1)
+---------------------------+
| upstream router |---------------------------- Internet
+---------------------------+
The default route of router ns is 10.0.0.1, add a static route 9.0.0.10/32
10.0.0.10 to upstream router , or learn the route by routing protocol
(neutron-dynamic-routing).
发件人: Carl Baldwin [mailto:c...@ecbaldwin.net]
发送时间: 2016年8月3日 6:39
收件人: OpenStack Development Mailing List (not for usage questions)
主题: Re: [openstack-dev] [neutron][dvr][fip] fg device allocated private ip
address
On Tue, Aug 2, 2016 at 6:15 AM, huangdenghui <hdh_1...@163.com> wrote:
hi john and brain
thanks for your information, if we get patch[1],patch[2] merged,then fg can
allocate private ip address. after that, we need consider floating ip
dataplane, in current dvr implementation, fg is used to reachment testing for
floating ip, now,with subnet types bp,fg has different subnet than floating ip
address, from fg'subnet gateway point view, to reach floating ip, it need a
routes entry, destination is some floating ip address, fg'ip address is the
nexthop, and this routes entry need be populated at the event of floating ip
creating, deleting when floating ip is dissociated. any comments?
The fg device will still do proxy arp for the floating ip to other devices on
the external network. This will be part of our testing. The upstream router
should still have an on-link route on the network to the floating ip subnet.
IOW, you shouldn't replace the floating ip subnet with the private fg subnet on
the upstream router. You should add the new subnet to the already existing ones
and the router should have an additional IP address on the new subnet to be
used as the gateway address for north-bound traffic.
Carl__________________________________________________________________________
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