netdev - Increasing, decreasing netmask with iproute2

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Date:	Thu, 21 Jan 2016 22:12:04 +0200
From:	Stanislav Makar <smakar@...antis.com>
To:	netdev@...r.kernel.org
Subject: Increasing, decreasing netmask with iproute2

Hello everyone

I am playing with changing netmask for ip v4 address and find out that
there is no
other possibility to do it except:

ip address add 1.2.3.4/21 dev <device>
ip address del 1.2.3.4/24 dev <device>

Looks like all is working but I would like to get official answer
that this is safe to do in such way?

Look forward to your answer.
Thanks in advance.


--
All the best,
Stanislav Makar