From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <stephen@networkplumber.org>
Subject: Re: [PATCH iproute2 2/3] utils: ll_map: Update name and type for
 existing entry
Date: Thu, 28 Dec 2017 09:46:45 -0800
Message-ID: <20171228094645.19549fcc@xeon-e3>
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Cc: netdev@vger.kernel.org
To: Serhey Popovych <serhe.popovych@gmail.com>
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On Wed, 20 Dec 2017 09:37:30 +0200
Serhey Popovych <serhe.popovych@gmail.com> wrote:

> In case of we update existing entry we need not only rehash
> but also update name in existing entry.
> 
> Need to update device type too since cached interface might
> be deleted and new with same index, but different type
> added (e.g. eth0 and ppp0).
> 
> Reuse new entry initialization path to avoid duplications.
> 
> Signed-off-by: Serhey Popovych <serhe.popovych@gmail.com>

Can you provide an example where this is an observed bug?
I suspect that unless you use a batch mode command the reload
of the cache on next invocation is solving this.