netdev - Re: [RFC] longer netdev names proposal

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Message-ID: <20190627112305.7e05e210@hermes.lan>
Date:   Thu, 27 Jun 2019 11:23:05 -0700
From:   Stephen Hemminger <stephen@...workplumber.org>
To:     Michal Kubecek <mkubecek@...e.cz>
Cc:     netdev@...r.kernel.org, David Ahern <dsahern@...il.com>,
        Jiri Pirko <jiri@...nulli.us>, davem@...emloft.net,
        jakub.kicinski@...ronome.com, sthemmin@...rosoft.com,
        mlxsw@...lanox.com
Subject: Re: [RFC] longer netdev names proposal

On Thu, 27 Jun 2019 20:08:03 +0200
Michal Kubecek <mkubecek@...e.cz> wrote:

> It often feels as a deficiency that unlike block devices where we can
> keep one name and create multiple symlinks based on different naming
> schemes, network devices can have only one name. There are aliases but
> AFAIK they are only used (and can be only used) for SNMP. IMHO this
> limitation is part of the mess that left us with so-called "predictable
> names" which are in practice neither persistent nor predictable.
> 
> So perhaps we could introduce actual aliases (or altnames or whatever we
> would call them) for network devices that could be used to identify
> a network device whenever both kernel and userspace tool supports them.
> Old (and ancient) tools would have to use the one canonical name limited
> to current IFNAMSIZ, new tools would allow using any alias which could
> be longer.
> 
> Michal

 
That is already there in current network model.
# ip li set dev eno1 alias 'Onboard Ethernet'
# ip li show dev eno1
2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether ac:1f:6b:74:38:c0 brd ff:ff:ff:ff:ff:ff
    alias Onboard Ethernet