Re: [Openstack-operators] [nova][neutron] What are your cells networking use cases?

Hi Carl. Adding some numbers from CERN to the discussion, we currently have: * ~40 cells * ~185 segments (called clusters in the our doc linked in the etherpad) * ~185*10 subnets, although it's not easy to compute the actual number today in our nova-network setup With the move to neutron (new

Re: [Openstack-operators] [nova][neutron] What are your cells networking use cases?

>Our DHCP concern is because currently the DHCP agent needs to be assigned to a network and then it creates a port for each subnet. The DHCP agent doesn't create a port per subnet. It only creates a port per network and adds extra IPs to that port as extra subnets are added to the network. In

Re: [Openstack-operators] [nova][neutron] What are your cells networking use cases?

Hi, thanks Carl for info about the DHCP plans. Our DHCP concern is because currently the DHCP agent needs to be assigned to a network and then it creates a port for each subnet. In our infrastructure we only consider a network with several hundred subnets. By default the DHCP agent runs in the

Re: [Openstack-operators] [nova][neutron] What are your cells networking use cases?

To follow up on the relay idea. In our implementation we have looked at trying to enable ip_helper on the switches to forward dhcp to a set of defined neutron dhcp servers. The issue is that this turns the dhcp requests from a broadcast packet to a unicast packet. With the default way

Re: [Openstack-operators] [nova][neutron] What are your cells networking use cases?

(resending with reply-all) The routed networks work will include a change to the DHCP scheduler which will work something like this: 1. Neutron subnets will have optional affinity to a segment 2. DHCP agents will (somewhat indirectly) report which segments to which they are attached*. 3. Where

Re: [Openstack-operators] [nova][neutron] What are your cells

There is also a bit of info on cells from the Manchester meetup in the Large Deployment team ether pad: https://etherpad.openstack.org/p/MAN-ops-Large-Deployment-Team I've added the link to the cells etherpad. --Rocky ___ OpenStack-operators mailing

Re: [Openstack-operators] [nova][neutron] What are your cells networking use cases?

On 25 February 2016 at 10:01, Tim Bell wrote: > > CERN info added.. Feel free to come back for more information if needed. > > Tim > On 24/02/16 22:47, "Edgar Magana" wrote: > >>It will be awesome if we can add this doc into the networking guide :-)

Re: [Openstack-operators] [nova][neutron] What are your cells networking use cases?

It will be awesome if we can add this doc into the networking guide :-) Edgar On 2/24/16, 1:42 PM, "Matt Riedemann" wrote: >The nova and neutron teams are trying to sort out existing deployment >network scenarios for cells v1 so we can try and document some of

[Openstack-operators] [nova][neutron] What are your cells networking use cases?

The nova and neutron teams are trying to sort out existing deployment network scenarios for cells v1 so we can try and document some of that and get an idea if things change at all with cells v2. Therefore we're asking that deployers running cells please document anything you can in an