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Subject: Re: tap interfaces disappears after bhyve guests shutdowns
To: "C. L. Martinez" <carlopmart@gmail.com>, freebsd-virtualization@freebsd.org
References: <20170213120938.hr3zu7flnm33v3zn@scotland.uxdom.org>
From: Miroslav Lachman <000.fbsd@quip.cz>
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Date: Mon, 13 Feb 2017 13:37:55 +0100
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C. L. Martinez wrote on 2017/02/13 13:09:

>   Why when a bhyve guest shutdowns or reboot tap interfaces goes down and lost IP assigned address?. I need to use same tap interface for several guests and assign an IP to this tap interface to act as a router for these guests.
>
>   How can I do a "persistent tap" interface??

I think you need this sysctl:

# sysctl -d net.link.tap.up_on_open
net.link.tap.up_on_open: Bring interface up when /dev/tap is opened