From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stephen Hemminger <stephen@networkplumber.org>
Subject: Re: [PATCH v3 iproute2 net-next] gre6: add collect metadata support
Date: Tue, 12 Dec 2017 17:40:02 -0800
Message-ID: <20171212174002.225f0a53@xeon-e3>
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Cc: netdev@vger.kernel.org, Daniel Borkmann <daniel@iogearbox.net>
To: William Tu <u9012063@gmail.com>
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On Tue, 12 Dec 2017 17:07:23 -0800
William Tu <u9012063@gmail.com> wrote:

> +.RB external
> +- make this tunnel externally controlled (or not, which is the default).
> +This is also known as collect_metadata mode for tunnels.

Much better.
The man page still needs some work.

The phrase "is also known as" is a little confusing and putting a specific
variable name in man page is misleading. Maybe better wording would
be:

In the kernel, this is referred to as collect metadata mode.