netdev - Re: Order of interfaces in output of ip link

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Message-ID: <CAHA+R7Ps+Fz7tww0-4XOtYT4-=iPYhA7OQxLTJcJYFptiRzsnA@mail.gmail.com>
Date:	Tue, 2 Sep 2014 12:30:02 -0700
From:	Cong Wang <cwang@...pensource.com>
To:	Ovidiu Mara <ovidiu.mara@...l.ch>
Cc:	netdev <netdev@...r.kernel.org>
Subject: Re: Order of interfaces in output of ip link

On Tue, Sep 2, 2014 at 7:27 AM, Ovidiu Mara <ovidiu.mara@...l.ch> wrote:
> eth0 and eth1 are two ports on the same network card, so I would expect them to be shown together, as they are numbered. According to the documentation I found here ( http://www.policyrouting.org/iproute2.doc.html#ss9.1.1 ): "The number followed by a colon is the interface index or ifindex. This number uniquely identifies the interface. If you look at the output from cat /proc/net/dev you will see that the network devices are listed in the same order as the numbering you see here."
>

You can't rely on the output order to tell if they are the ports
on the same card, you need to dig some other information
for example sysfs.
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