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We're trying to build a flat network and we wonder if we're using the wrong terminology in our searches

asked 2014-08-18 18:13:59 -0500

jeffsilverman gravatar image

We're trying to build what we think ought to be called a "flat network", but we're not having much luck and one of the hypothesis that has been put forth is that what we want to do is actually called something else.

Our openstack has 4 physical computers: 1 storage machine, 2 compute machines, and 1 machine that is the controller, identity server, neutron, and everything else. We want network packets from the compute machines to go directly to the default gateway, which also serves as a switch for traffic within the openstack. We're finding lots of documentation on all the wonderful things you can do if you put neutron in front of the compute machines, but that's not what we want because that would be a bottleneck and we have upstream machines that protect the openstack from The Evil on the Internet. What would we call such a network? Can somebody please point us to more information on how to set up something like this?

I promise that if we figure out something, then I will write something on how to do it in sufficient detail that somebody else can replicate it.

Thank you.

Jeff Silverman

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answered 2014-08-22 16:45:48 -0500

smaffulli gravatar image

I'm not even sure what the problem is: have you already looked at the Operations Guide for suggestions on how to setup your POC?

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answered 2014-08-23 05:20:05 -0500

alissa gravatar image

hi, when i firstly meet the openstack, i exactly tought like you. i assumed that all traffic goes on neutron, but i was wrong. neutron mostly make configuration for flat and vlan network. not act as a gateway(if you do not use floating ips). because of that if the neutron close down, the network flows normally(if there is no need for a dhcp service).

if you set flat network for an interface which is provides internet using different sources, as you expect, your host internet connection communicates your gateway directly but not over neutron. i have a system like you need. it is working like a charm. i never use neutron as a gateway for internet because of some special needs. i have different network systems like l3 backbone, loadbalancer and firewall and all internet goes on that propriearty devices.

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Asked: 2014-08-18 18:13:59 -0500

Seen: 177 times

Last updated: Aug 23 '14