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Hi Keshava,

I'm afraid that your use case is out of the scope of this bp. We have
thought only to provide admin API to share external/provider network
routes. Due IP ranges overlapping, share tenant networks won't be able with
my approach.

However, I find that after BGP will be implemented, with a few changes (as
let the user create RoutingInstance entities, add tenant_id field in that
entity and use underlaying VPN technology), your use case would be
feasible. Take a look at Nachi Ueno's spec:
https://review.openstack.org/#/c/93329/ I think is so close to your
proposal.

Regards,
jaume


On 25 June 2014 19:51, A, Keshava <keshava.a at hp.com> wrote:

>  Hi,
>
>
>
>  If BGP can export its private-IP to upstream they can be placed in the
> corresponding VRF table w.r.t that VPN.
>
> In the below example Geographically separated Data-center hosts same
> Customers   (Red, Blue Customer).
>
> If BGP from virtual Network exports its IP to upstream  BGP VRF table (of
> that VPN), then from there  using carrier’s carrier mechanism , BGP will
> carry respective VRF route entries to remote site BGP Routing table.
>
> During packet forwarding from remote-site , the remote router will look
> into its corresponding VRF table entries to check where is the destination
> for that IP.
>
> Based on the packet will be forwarded on respective VPN tunnel .
>
>
>
> *So private-IP should be advertised by BGP from the cloud under  that
> respective VRF (VPN).*
>
>
>
> Thanks  &regards,
>
> Keshava
>
>
>
> -----Original Message-----
> From: Jaume Devesa (Code Review) [mailto:review at openstack.org]
> Sent: Wednesday, June 25, 2014 3:06 PM
> To: Artem Dmytrenko
> Cc: Baldwin, Carl (OpenStack Neutron); mark mcclain; Sean M. Collins;
> Anthony Veiga; Pedro Marques; Nachi Ueno; YAMAMOTO Takashi; Itsuro Oda;
> fumihiko kakuma; A, Keshava
> Subject: Change in openstack/neutron-specs[master]: BGP dynamic routing
>
>
>
> Jaume Devesa has posted comments on this change.
>
>
>
> Change subject: BGP dynamic routing
>
> ......................................................................
>
>
>
>
>
> Patch Set 8:
>
>
>
> (3 comments)
>
>
>
> Hi keshava,
>
>
>
> I've tried to answer your questions, but I am not confident about your use
> case. Can you explain me, please? Or ping me anytime at irc (my nickname is
> devvesa)
>
>
>
> https://review.openstack.org/#/c/90833/8/specs/juno/bgp-dynamic-routing.rst
>
> File specs/juno/bgp-dynamic-routing.rst:
>
>
>
> Line 120: namespace in the compute node.
>
> > Please make it clear: If DVR is turned-on BGP can be enabled or not ?
>
> BGP can be enabled. However, I think this paragraph crosses concepts that
> may confuse people. I will delete in the next patch.
>
>
>
>
>
> Line 123: to an upstream router. It does not require learning routes from
> the upstream
>
> > Is it possible how to block learning from upstream peer router ?
>
> Yes, is absolutely configurable. If you see the RoutingInstance entity
> down below, you will see that you can choose either you want to learn or
> advertise the routes .
>
>
>
>
>
> Line 159: Overview
>
> > Is it possible to enabled BGP only on private IP address ?
>
> With the RoutingInstance entity, you put together:
>
>
>
> 1. Which peers you want to connect
>
> 2. Which networks are involved
>
> 3. Whether to enable/disable discovery AND advertise of routes.
>
>
>
> Also, you will be able to add advertise routes manually.
>
>
>
> So theoretically, you will be able to advertise a private IP address,
> although I can not see the use case of this.
>
>
>
>
>
> --
>
> To view, visit https://review.openstack.org/90833
>
> To unsubscribe, visit https://review.openstack.org/settings
>
>
>
> Gerrit-MessageType: comment
>
> Gerrit-Change-Id: I41b66c1c3083d7c8205368353302fafdb7a110c8
>
> Gerrit-PatchSet: 8
>
> Gerrit-Project: openstack/neutron-specs
>
> Gerrit-Branch: master
>
> Gerrit-Owner: Artem Dmytrenko <nextone92 at yahoo.com>
>
> Gerrit-Reviewer: Anthony Veiga <anthony_veiga at cable.comcast.com>
>
> Gerrit-Reviewer: Artem Dmytrenko <nextone92 at yahoo.com>
>
> Gerrit-Reviewer: Carl Baldwin <carl.baldwin at hp.com>
>
> Gerrit-Reviewer: Itsuro Oda <oda at valinux.co.jp>
>
> Gerrit-Reviewer: Jaume Devesa <devvesa at gmail.com>
>
> Gerrit-Reviewer: Jenkins
>
> Gerrit-Reviewer: Nachi Ueno <nachi at ntti3.com>
>
> Gerrit-Reviewer: Pedro Marques <pedro.r.marques at gmail.com>
>
> Gerrit-Reviewer: Sean M. Collins <sean_collins2 at cable.comcast.com>
>
> Gerrit-Reviewer: YAMAMOTO Takashi <yamamoto at valinux.co.jp>
>
> Gerrit-Reviewer: fumihiko kakuma <kakuma at valinux.co.jp>
>
> Gerrit-Reviewer: keshava <keshava.a at hp.com>
>
> Gerrit-Reviewer: mark mcclain <mmcclain at yahoo-inc.com>
>
> Gerrit-HasComments: Yes
>



-- 
Jaume Devesa
Software Engineer at Midokura
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