ifconfig: BRDGADD lo1: invalid argument

[Marko Zec]

On Sat, 25 Jun 2016 16:42:40 +0000
<org.freebsd.security at io7m.com> wrote:

> Hello.
> 
> I'm trying to create a bridge interface to isolate some jails on
> private addresses. I'm on a near-pristine install of 10.3, updated to
> 10.3-p5 via freebsd-update.
> 
> The virtual interface to which the jails will be bound:
> 
> # ifconfig lo1 create
> 
> The bridge:
> 
> # ifconfig bridge create
> bridge0
> # ifconfig bridge0 addm em0
> # ifconfig bridge0 addm lo1
> ifconfig: BRDGADD lo1: Invalid argument

if_bridge(4) works only with ethernet interfaces, and lo(4) isn't such a
thing.

Assuming you are using vnet jails, take a look at if_epair(4): assign
one endpoint to the bridge, and the another one to the jail.

If you're not using vnet jails, you should simply add an alias address
to em0.

> I can find one reference to this error message online from 2007:
> 
>   https://lists.freebsd.org/pipermail/freebsd-net/2007-December/016102.html
> 
> ... but this doesn't appear to be the problem I'm having (it seems as
> though it was caused by an out-of-sync kernel and world, which I
> obviously don't have).
> 
> Any ideas how to get this working?
> 
> M
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