From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <stephen@networkplumber.org>
Subject: Re: [PATCH iproute2] ip tap: Simplify add 'tap' device w/o mode
Date: Sun, 1 Mar 2015 14:07:15 -0800
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To: Vadim Kochan <vadim4j@gmail.com>
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On Sat, 28 Feb 2015 11:59:46 +0200
Vadim Kochan <vadim4j@gmail.com> wrote:

> From: Vadim Kochan <vadim4j@gmail.com>
> 
> It allows add 'tap' device w/o specify mode:
> 
>     # ip tap add tap0
> 
> instead of return error message.
> 
> Signed-off-by: Vadim Kochan <vadim4j@gmail.com>

No. mode should not depend on device name.

Also, I noticed that reading kernel code it is possible to
create a broken tun device if type is not set.