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Hi, shihanzhang and Neil, Thanks for your comments.

In your comments. I think that Neutron router or physical network should
provide routing these two subnets, doesn't it? Does my thought was right?

I tried to connect these two subnets with a Neutron router but I met a
strange problem. I did some operations like this:

stack at devstack:~$ neutron net-list
+---------------------------------------------------------+-----------+----------------------------------------------------------------------------+
| id                                                                  |
name     |                             subnets
                     |
+---------------------------------------------------------+-----------+----------------------------------------------------------------------------+
| 6596da30-d7c6-4c39-b87c-295daad44123 | multinet |
a998ac2b-2f50-44f1-9c1a-f4f3684ef63c 10.1.1.0/24        |
|                                                                       |
           | 26bcdfd3-6393-425e-963e-1ace6ef74e0c 10.1.0.0/24     |
| 662de35c-f7a7-47cd-ba18-e5a2470935f0    | net       |
9754dfe9-be48-4a38-b690-5c48cf371ba3 10.10.10.0/24  |
+----------------------------------------------------------+----------+----------------------------------------------------------------------------+
stack at devstack:~$ neutron router-port-list
c488238d-06d7-4b85-9fa1-e0913e5bcf13

stack at devstack:~$ neutron router-interface-add
c488238d-06d7-4b85-9fa1-e0913e5bcf13 a998ac2b-2f50-44f1-9c1a-f4f3684ef63c
Added interface 680eb2b6-b445-4790-9610-80154dd6d909 to router
c488238d-06d7-4b85-9fa1-e0913e5bcf13.
stack at devstack:~$ neutron router-port-list
c488238d-06d7-4b85-9fa1-e0913e5bcf13
+----------------------------------------------------------+--------+-----------------------+-----------------------------------------------------------------------------------+
| id                                                                   |
name | mac_address       | fixed_ips
                                              |
+----------------------------------------------------------+--------+------------------------+----------------------------------------------------------------------------------+
| 680eb2b6-b445-4790-9610-80154dd6d909 |           | fa:16:3e:47:2e:8f |
{"subnet_id": "26bcdfd3-6393-425e-963e-1ace6ef74e0c", "ip_address": "
10.1.0.10"} |
+----------------------------------------------------------+---------+----------------------+-----------------------------------------------------------------------------------+


After adding a port interface ( subnet 10.1.1.0/24  ) to the router, Why
does the port's IP address was 10.1.0.10 ? Why not it should be 10.1.1.x/24
?



Thanks
Zhi Chang

2016-11-01 17:19 GMT+08:00 shihanzhang <ayshihanzhang at 126.com>:

> agree with Neil.
>
> thanks
> shihanzhang
>
>
>
> 在 2016-11-01 17:13:54，"Neil Jerram" <neil at tigera.io> 写道：
>
> Hi Zhi Chang,
>
> I believe the answer is that the physical network (aka fabric) should
> provide routing between those two subnets. This routing between segments is
> implicit in the idea of a multi-segment network, and is entirely
> independent of routing between virtual _networks_ (which is done by a
> Neutron router object connecting those networks).
>
> Hope that helps!
>     Neil
>
>
> *From: *zhi
> *Sent: *Tuesday, 1 November 2016 07:50
> *To: *OpenStack Development Mailing List (not for usage questions)
> *Reply To: *OpenStack Development Mailing List (not for usage questions)
> *Subject: *Re: [openstack-dev] [neutron][routed-network] Host doesn't
> connected any segments when creating port
>
> Hi, shihanzhang.
>
> I still have a question about routed network. I have two subnets. One is
> 10.1.0.0/24 and the other is 10.1.1.0/24. I create two instances in each
> host.
> Such as 10.1.0.10 and 10.1.1.10.
>
> My question is, how does 10.1.0.10 connect to 10.1.1.10 ?  There is no any
> gateway( 10.1.0.1 and 10.1.1.1 ) in each subnet.
>
>
> Hope four your reply. ;-)
>
>
> Thanks
> Zhi Chang
>
> 2016-11-01 14:31 GMT+08:00 zhi <changzhi1990 at gmail.com>:
>
>> Hi, shihanzhang.
>>
>> Thanks for your advice. Now I can created ports successfully by your
>> advice.
>>
>>
>>
>> Thanks
>> Zhi Chang
>>
>>
>> 2016-11-01 12:50 GMT+08:00 shihanzhang <ayshihanzhang at 126.com>:
>>
>>> Hi Zhi Chang,
>>> Maybe you should add a config option in [ovs] section: bridge_mappings =
>>> public:br-ex, physnet1:br-physnet1 to handle the provider network
>>> 'physnet1'.
>>>
>>> Thanks,
>>> shihanzhang
>>>
>>> At 2016-11-01 11:56:33, "zhi" <changzhi1990 at gmail.com> wrote:
>>>
>>> hi shihanzhang.
>>>
>>> Below is configuration in ml2_conf.ini. Please review it. :)
>>>
>>> stack at devstack:~/neutron/neutron$ cat /etc/neutron/plugins/ml2/ml2_conf.ini
>>> |grep -v "#"|grep -v ^$
>>> [DEFAULT]
>>> [ml2]
>>> tenant_network_types = vxlan
>>> extension_drivers = port_security
>>> mechanism_drivers = openvswitch,linuxbridge
>>> tenant_network_types = vxlan
>>> [ml2_type_flat]
>>> flat_networks = public,public,
>>> [ml2_type_geneve]
>>> vni_ranges = 1:1000
>>> [ml2_type_gre]
>>> tunnel_id_ranges = 1:1000
>>> [ml2_type_vlan]
>>> network_vlan_ranges = physnet1,physnet2
>>> [ml2_type_vxlan]
>>> vni_ranges = 1:1000
>>> [securitygroup]
>>> firewall_driver = neutron.agent.linux.iptables_f
>>> irewall.OVSHybridIptablesFirewallDriver
>>> [agent]
>>> tunnel_types = vxlan
>>> root_helper_daemon = sudo /usr/local/bin/neutron-rootwrap-daemon
>>> /etc/neutron/rootwrap.conf
>>> root_helper = sudo /usr/local/bin/neutron-rootwrap
>>> /etc/neutron/rootwrap.conf
>>> [ovs]
>>> datapath_type = system
>>> bridge_mappings = public:br-ex
>>> tunnel_bridge = br-tun
>>> local_ip = 192.168.10.20
>>>
>>>
>>>
>>> Thanks
>>> Zhi Chang
>>>
>>> 2016-11-01 9:15 GMT+08:00 shihanzhang <ayshihanzhang at 126.com>:
>>>
>>>> hi Zhi chang,
>>>> Could you provide your ml2_conf.ini for ovs agent, I guess the reason
>>>> is that your ovs-agent on host devstack can't handle the related segment id.
>>>>
>>>> Thanks,
>>>> shihanzhang
>>>>
>>>> 在 2016-10-31 18:43:36，"zhi" <changzhi1990 at gmail.com> 写道：
>>>>
>>>> Hi, all.
>>>>
>>>> Recently, I watch the OpenStack Summit video named ' Scaling Up
>>>> OpenStack Networking with Routed Networks '.  Carl and Miguel made this
>>>> topic.  I learned a lot of your topic. Thanks.
>>>>
>>>> But I have some questions about the demo in the topic.
>>>>
>>>> I do some steps according to the topic.
>>>>
>>>> First, creating two networks like this:
>>>>
>>>> neutron net-create multinet --shared --segments type=dict list=true
>>>> provider:physical_network=physnet1,provider:segmentation_id=
>>>> 2016,provider:network_type=vlan     provider:physical_network=phys
>>>> net2,provider:segmentation_id=2016,provider:network_type=vlan
>>>>
>>>>
>>>> Second, I get two segments after creating this network. I get these
>>>> segments by using " openstack network segment list ".
>>>>
>>>> Third, I create two subnets by these segments by using this command "
>>>>
>>>> neutron subnet-create --ip_version 4 --name multi-segment1-subnet
>>>> [net-id] 10.1.0.0/24 --segment_id [segment-id]
>>>> neutron subnet-create --ip_version 4 --name multi-segment2-subnet
>>>> [net-id] 10.1.1.0/24 --segment_id [segment-id]
>>>>  "
>>>>
>>>> At last, I want to create a port with host_id. My local environment
>>>> contains two compute nodes, one is named "devstack"  and the other is
>>>> "devstack2". So I use this command "  neutron port-create
>>>> --binding:host_id=devstack [net-id] ".
>>>>
>>>> Exception happens in neutron server. The exception says "
>>>>
>>>> Host devstack is not connected to any segments on routed provider
>>>> network [net-id].  It should be connected to one." I can not get this exact
>>>> point about this exception.
>>>>
>>>> Why does the "routed network" have relationship with host?
>>>>
>>>> How they work together between "host info (compute node ?)" and "routed
>>>> network"?
>>>>
>>>> What should I do if I want to get rid of this exception?
>>>>
>>>>
>>>> Hope for your reply. Especially Carl and Miguel. ;-)
>>>>
>>>>
>>>>
>>>> Many Thanks
>>>> Zhi Chang
>>>>
>>>>
>>>>
>>>>
>>>>
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>>>>
>>>>
>>>
>>>
>>>
>>>
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>>
>
>
>
>
>
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