[Openstack] Neutron network node setup
Erich Weiler
weiler at soe.ucsc.edu
Wed Apr 2 22:37:19 UTC 2014
Hi Ageeleshwar,
I *think* I see what you are saying - is this correct? First, I create
a flat external network:
# neutron net-create ext-net --provider:network_type=local --shared
--router:external=True
Created a new network:
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| id | 71b4b5b9-e744-4c67-9b62-4f64ab727e47 |
| name | ext-net |
| provider:network_type | local |
| provider:physical_network | |
| provider:segmentation_id | |
| router:external | True |
| shared | True |
| status | ACTIVE |
| subnets | |
| tenant_id | 36687b1d611740bd9e7309432b22dbcd |
+---------------------------+--------------------------------------+
# neutron subnet-create ext-net --allocation-pool
start=134.145.112.10,end=134.145.112.100 --gateway=134.145.112.1
--enable_dhcp=False 134.145.112.0/24
Created a new subnet:
+------------------+------------------------------------------------------+
| Field | Value |
+------------------+------------------------------------------------------+
| allocation_pools | {"start": "134.145.112.10", "end": "134.145.112.100"} |
| cidr | 134.145.112.0/26 |
| dns_nameservers | |
| enable_dhcp | False |
| gateway_ip | 134.145.112.1 |
| host_routes | |
| id | 6082cdb3-98bc-4fbe-a0fb-ff264ea7384f |
| ip_version | 4 |
| name | |
| network_id | 71b4b5b9-e744-4c67-9b62-4f64ab727e47 |
| tenant_id | 36687b1d611740bd9e7309432b22dbcd |
+------------------+------------------------------------------------------+
Create a router from ext-to-int for my demo tenant:
# neutron router-create ext-to-int --tenant-id
f7e61747885045d8b266a161310c0094
Created a new router:
+-----------------------+--------------------------------------+
| Field | Value |
+-----------------------+--------------------------------------+
| admin_state_up | True |
| external_gateway_info | |
| id | 4ca4292c-8954-4f21-acd6-b0044e0d02cb |
| name | ext-to-int |
| status | ACTIVE |
| tenant_id | f7e61747885045d8b266a161310c0094 |
+-----------------------+--------------------------------------+
Set my router gateway:
# neutron router-gateway-set 4ca4292c-8954-4f21-acd6-b0044e0d02cb
71b4b5b9-e744-4c67-9b62-4f64ab727e47
Set gateway for router 4ca4292c-8954-4f21-acd6-b0044e0d02cb
Create a tenant-network with a VLAN:
# neutron net-create --tenant-id f7e61747885045d8b266a161310c0094
demo-net --provider:network_type vlan --provider:physical_network
physnet1 --provider:segmentation_id 201
Created a new network:
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| id | 37190389-df4b-49c0-81b9-05aa6411a81b |
| name | demo-net |
| provider:network_type | vlan |
| provider:physical_network | physnet1 |
| provider:segmentation_id | 201 |
| shared | False |
| status | ACTIVE |
| subnets | |
| tenant_id | f7e61747885045d8b266a161310c0094 |
+---------------------------+--------------------------------------+
Create demo-net subnet:
# neutron subnet-create --tenant-id f7e61747885045d8b266a161310c0094
demo-net 10.200.0.0/16 --gateway 10.200.0.1
Created a new subnet:
+------------------+--------------------------------------------------+
| Field | Value |
+------------------+--------------------------------------------------+
| allocation_pools | {"start": "10.200.0.2", "end": "10.200.255.254"} |
| cidr | 10.200.0.0/16 |
| dns_nameservers | |
| enable_dhcp | True |
| gateway_ip | 10.200.0.1 |
| host_routes | |
| id | da53e0df-fb00-46ad-a709-6eaeda13e23f |
| ip_version | 4 |
| name | |
| network_id | 37190389-df4b-49c0-81b9-05aa6411a81b |
| tenant_id | f7e61747885045d8b266a161310c0094 |
+------------------+--------------------------------------------------+
Set the router for demo-net:
# neutron router-interface-add 4ca4292c-8954-4f21-acd6-b0044e0d02cb
da53e0df-fb00-46ad-a709-6eaeda13e23f
Added interface 250215bf-fe8b-40ed-aeb9-e284427ec432 to router
4ca4292c-8954-4f21-acd6-b0044e0d02cb.
And that should work yes? With a flat ext-net and a VLAN-based internal
net for my tenant net demo-net?
Thanks so much for you help! The guides don't really go into this kind
of detail...
-erich
On 4/2/14, 3:07 AM, Ageeleshwar Kandavelu wrote:
> Make your external network flat. If you do so there wont be any vlan tag
> on packets reaching your external network.
>
> in you plugin.ini you put something like this
> network_vlan_ranges = Intnet1:100:200,Extnet
> bridge_mappings = Intnet1:br-eth1,Extnet:br-ex
>
> This means you would use vlan id 100 to 200 on openstack networks
> created on top of Intnet1.
>
> On Extnet you would not use any vlan.
>
> Then you say that to all traffic on network created on Intnet1 should be
> bridged to br-eth1. Then you would add eth1 to br-eth1.
>
> Then you say all traffic for Extnet should be bridged to br-ex. Then you
> have to add a physical interface say eth2 to br-ex.
>
> Finally you can create an external network in openstack with
> physical_network=Extnet.
>
> You just said that all internal network shall be created and Intnet1 and
> allocated vlan from 100 to 200.
> External network shall be overlaid on top of Extnet and no vlans.
>
> Hope it makes sense.
>
> Ageeleshwar K
>
>
> ------------------------------------------------------------------------
> *From:* Alex Yang [alex890714 at gmail.com]
> *Sent:* Wednesday, April 02, 2014 7:09 AM
> *To:* Erich Weiler
> *Cc:* openstack at lists.openstack.org
> *Subject:* Re: [Openstack] Neutron network node setup
>
> Hi Erich,
>
> I think this following articles may helpful for you.
>
> http://developer.rackspace.com/blog/categories/networking/
>
>
>
> 2014-04-02 5:59 GMT+08:00 Erich Weiler <weiler at soe.ucsc.edu
> <mailto:weiler at soe.ucsc.edu>>:
>
> Hey Y'all,
>
> I'm setting up a dedicated neutron network node and I'm having a bit
> of trouble understanding the way the networks work. On the network
> node I have one interface on the public net (eth0), one interface on
> the private net (eth1) and I'm following these guides to set it up.
>
> My plan is to have eth0 on the public network, no VLAN magic there
> or anything. eth1 will be the data interface, and it will be
> connected to a trunk switchport so it can use VLANs for tenant
> isolation (OVS VLAN plugin).
>
> I ran this command to set up ext-net:
>
> neutron net-create ext-net --router:external=True
>
> Created a new network:
> +---------------------------+-__------------------------------__-------+
> | Field | Value |
> +---------------------------+-__------------------------------__-------+
> | admin_state_up | True |
> | id | a5599b54-dbfc-42fa-b5b9-__e8ebd574ded0 |
> | name | ext-net |
> | provider:network_type | vlan |
> | provider:physical_network | physnet1 |
> | provider:segmentation_id | 200 |
> | router:external | True |
> | shared | False |
> | status | ACTIVE |
> | subnets | |
> | tenant_id | 36687b1d611740bd9e7309432b22db__cd |
> +---------------------------+-__------------------------------__-------+
>
> But, I don't think network_type=vlan right? As eth0 just sits right
> on a public network? Should network_type=local instead? Also,
> should physical_network equal null, and also segmentation_id equal
> null as well?
>
> I would understand type=vlan and seg_id and such for a tenant
> network, but for ext-net?
>
> Any hints would be greatly appreciated...!
>
> -erich
>
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