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[Qemu-devel] Alternative mac address setting

From: Benoît Canet
Subject: [Qemu-devel] Alternative mac address setting
Date: Tue, 16 Jul 2013 13:36:49 +0200
User-agent: Mutt/1.5.21 (2010-09-15)


I want to implement an alternative mac address setting to allow a guest using
virtio-net to change it's mac address by itself.

The main use case is high availability setups where a slave machine take the
lead when the master is failing. (heartbeat)

The thing that an alternate mac address setting would allow to do is to make
the switch _without_ requiring a gratuitous arp.

The slave guest would simply take the master guest mac address and resume

I initially though about implementing a list of alternate mac address but I fear
that in this context lists are frowed upon.

Do you have any advice on how to implement this feature ?

Should I support old net device declaration ?

What is the strict minimum changes that would need to be done to implement the
feature ?

Best regards


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