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From: hiro <23hiro@gmail.com>
Date: Sat, 25 Aug 2018 22:59:44 +0200
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To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
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Subject: Re: [9fans] Static ip configuration for a standalone cpu server in
 qemu on Linux
Topicbox-Message-UUID: de20ef8e-ead9-11e9-9d60-3106f5b1d025

nothing in the fqa mentions the tap device's mac address (which linux
generated randomly in order not to conflict with whatever you might be
using on the other side).

look at the tap device as an ethernet interface that is plugged into
the same L2 switch as the VM's virtual interface.

you don't want mac address collisions in one L2 network, so yes, use a
different one for the VM.