VLAN mode with a default shared VLAN

asked 2013-07-10 13:30:41 -0600

anonymous user


updated 2013-07-11 07:41:24 -0600


I'm not really sure what networking model I want in OpenStack terminology, but I'm very sure how I'd like my network to be setup. (Or rather, how I'm required to set it up.)

  • No private IP's and no NAT.
  • I need VLAN support, but not for all users/tenants (customers).

Most customers will reside on a "default VLAN" where we'd either like to have our own DHCP server, or if OpenStack software can assign the IP's automatically to the instances. However, no NAT, no private IP's, I have public IP ranges to use for this.

A tenant/user shall optionally be able to have 1 or more custom VLAN's (but still be able to have interfaces on the default VLAN). On these custom VLAN's a tenant/user is self responsible for DHCP, otherwise it should be manually assigned static IP's.

Is a setup like this possible with OpenStack? If yes, how? If no, what do you suggest instead?

In either case, is there some detailed documentation of all possible network configurations with OpenStack listed at the same place?

Edit: I have understood that I must install and configure openvswitch and quantum. Done that according to documentation and can't get that to work either. No matter what I do I just get: "Invalid input for operation: Unknown provider:physical_network default." when I try to create my default network with quantum. Any help from anyone?

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Did you ever get this figured out? I'd be interested in the answer?

metarx gravatar imagemetarx ( 2013-09-24 11:12:24 -0600 )edit

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answered 2014-06-10 03:33:50 -0600

swarvanusg gravatar image

updated 2014-06-10 03:40:31 -0600

Hi, If you are using Neutron as your NetWork Service then "without private IP or NAT" can be configured. It doesn't give IP from floating IP pool but assign public IP on VM directly by any outside DHCP server. Please refer:



First of all what you mean by VLAN support? If you are talking about tenant segregation using VLAN. Then you can use ML2 plugin in Neutron using any type driver. I would prefer GRE (GRE + VLAN). But in that case you don't have any custom VLAN option. I doubt if there is any custom VLAN option while you are using Neutron. Nova-network have custom VLAN option but it won't work along with Neutron.

Please Refer:


Neutron might have some different way of providing VLAN network. Please Refer:



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You wrote : If you are using Neutron as your NetWork Service then No private IP or NAT can be configured.Moreover you are changing your answer on the fly
I am not sure, that you are correct.

dbaxps gravatar imagedbaxps ( 2014-06-10 03:42:50 -0600 )edit

Sorry for my Bad English. Yeah there was some grammatical issue. I mean to say if you want the configuration i.e. "No nat and No private IP", then it can be done. That's why I changed the answer by replacing 'no' with 'without'. And now the answer seems correct right :) Regards

swarvanusg gravatar imageswarvanusg ( 2014-06-10 04:44:31 -0600 )edit

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Asked: 2013-07-10 13:30:41 -0600

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Last updated: Jun 10 '14