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Networking with openstack

asked 2014-03-04 06:23:51 -0500

Vikrant Pawar gravatar image


I ma using default RDO installation, with CONFIG_NEUTRON_OVS_TENANT_NETWORK_TYPE=local. First if there is any guide explaining different types of network it will be great.

I used local and setup br-ex with my eth0 and create external n/w in openstack to match real n/w ip and everything started working though machine were not using same ip assign by openstack they were still accessible from out side due to local lan.

Now issues arose as I add another compute node, and try to use same n/w, now connectivity is lost. There is no tunnel setup I could observe.

Do you I need to setup tunnel or do some configuration to use same n/w across multiple nodes.

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answered 2014-03-04 08:46:19 -0500

RomilGupta gravatar image

Hi Vikrant ,

To read about basics of openstack networking , please find the link below :

My suggestion if you want to start exploring and want to try different use-cases then start with VLAN network type.

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answered 2014-03-04 09:38:23 -0500

cloudssky gravatar image

If you add another compute node you have to define either GRE or VLAN as your networking mode, GRE is somehow easier compared to VLAN to setup, since you don't have to deal with your Switch to set the inerfaces as trunk.

Last week Lars Kellog-Stedmann gave an excellent webinar about how to setup RDO Havanna with GRE:

The presentation can be found here:

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Asked: 2014-03-04 06:23:51 -0500

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Last updated: Mar 04 '14