[Openstack] [OpenStack] Networking Issues

Brandon Adams brandon.adams at newwave-technologies.com
Fri Aug 2 15:01:55 UTC 2013

Hi all,

I'm attempting to set up an installation of OpenStack Grizzly on a single
node running Centos 6.4 with two NICs. eth0 is 192.168.0.x (public, other
computers in the office are on this network) and eth1 is 10.0.0.x (using as
private). A few questions:

Does it make a difference that eth1, my private network, has internet
access? My box is the only thing that has access to this network. It is
managed by my offices router. I have a feeling this might be causing a
problem somewhere.

When I created my bridge, I gave it the default value of, and
bridged it to eth1. When I did this, eth1 lost its IP address. Is this

When I spawn an instance through nova, it is assigned an IP from the range
of the internal network (192.168.100.x). I've created a set of floating
IPs, and assigned one to it. But whenever I try and access it with iptables
up, the host is unreachable. When I disable iptables, it allows me to
connect, but I'm connecting to the localhost, not the VM. Any thoughts?

I can also dump any .conf files if anyone thinks it would help. I'd really
appreciate any tips you all might have. Thanks.

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