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[Neutron][segments]


Many  thanks, Layos

Il giorno ven 7 feb 2020 alle ore 09:22 Lajos Katona <katonalala at gmail.com>
ha scritto:

> Hi,
>
> I assume you refer to this documentation (just to be sure that others have
> the same base):
> https://docs.openstack.org/neutron/latest/admin/config-routed-networks.html
>
> Based on that (and my limited knowledge of the usecases of this feature):
> To avoid large l2 tenant networks and small tenant networks which the user
> has to know and select,
> routed provider nets "provide" the option to use a provider network
> (characterized by a segment: physical network - segmentation type -
> segmentation id)
> and you can add more segments (as in the example for example with new VLAN
> id, but on the same physnet on other compute) and add extra subnet range
> for it
> which is specific for that segment (i.e.: a group of computes).
> With this the user will have 1 network to boot VMs on, but openstack
> (neutron - nova - placement) will decide where to put the VM which segment
> and subnet to use.
>
> I mentioned placement: The feature should work in a way that based on
> information provided by neutron (during segment & subnet creation)
> placement knows
> how many free IP addresses are available on a segment, and based on this
> places VMs to hosts, that is not working as I know, see:
> https://review.opendev.org/656885 & https://review.opendev.org/665155
>
> Regards
> Lajos
>
> Ignazio Cassano <ignaziocassano at gmail.com> ezt írta (idÅ?pont: 2020. febr.
> 6., Cs, 21:04):
>
>> Hello,
>> I am reading about openstack neutron routed provider networks.
>> If I understood well, using segments I can create more subnets within the
>> same provider net vlan id.
>> Correct?
>> In documentation seems I must use different physical network for each
>> segment.
>> I am using only one physical network ...in other words I created an
>> openvswitch with a bridge (br-ex) with an interface on which I  receive all
>> my vlans (trunk).
>> Why must I use different physical net?
>> Sorry, but my net skill is poor.
>> Ignazio
>>
>>
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