Open vSwitch and persistent MAC addresses

Normally I like to post solutions, but today's post is about a vexing problem to which I have not been able to find a solution.

This started as a simple attempt to set up external connectivity on an all-in-one Icehouse install deployed on an OpenStack instance. I wanted to add eth0 to br-ex in order to model a typical method for providing external connectivity, but I ran into a very odd problem: the system would boot and work fine for a few seconds, but would then promptly lose network connectivity.

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Solved: Open vSwitch and persistent MAC addresses

In my previous post I discussed a problem I was having setting a persistent MAC address on an OVS bridge device. It looks like the short answer is, "don't use ip link set ..." for this purpose.

You can set the bridge MAC address via ovs-vsctl like this:

ovs-vsctl set bridge …
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Fedora and OVS Bridge Interfaces

I run OpenStack on my laptop, and I've been chasing down a pernicious problem with OVS bridge interfaces under both F19 and F20. My OpenStack environment relies on an OVS bridge device named br-ex for external connectivity and for making services available to OpenStack instances, but after rebooting, br-ex was …

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Firewalld, NetworkManager, and OpenStack

These are my notes on making OpenStack play well with firewalld and NetworkManager.

NetworkManager

By default, NetworkManager attempts to start a DHCP client on every new available interface. Since booting a single instance in OpenStack can result in the creation of several virtual interfaces, this results in a lot of …

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Flat networks with ML2 and OpenVSwitch

Due to an unfortunate incident involving sleep mode and an overheated backpack I had the "opportunity" to rebuild my laptop. Since this meant reinstalling OpenStack I used this as an excuse to finally move to the ML2 network plugin for Neutron.

I was attempting to add an external network using …

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