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From: Stephen Hemminger <stephen@networkplumber.org>
To: "Philip Prindeville" <philipp@redfish-solutions.com>
Cc: netdev@vger.kernel.org, Michele Lucini <mlucini@safearea.com.au>
Subject: Re: [PATCH v3] iproute2: add support for GRE ignore-df knob
Date: Thu, 20 Jul 2017 17:26:28 -0700	[thread overview]
Message-ID: <20170720172628.06d358b5@xeon-e3> (raw)
In-Reply-To: <20170720190610.6886-1-philipp@redfish-solutions.com>

On Thu, 20 Jul 2017 13:06:10 -0600
"Philip Prindeville" <philipp@redfish-solutions.com> wrote:

> From: Philip Prindeville <philipp@redfish-solutions.com>
> 
> In the presence of firewalls which improperly block ICMP Unreachable
> (including Fragmentation Required) messages, Path MTU Discovery is
> prevented from working.
> 
> The workaround is to handle IPv4 payloads opaquely, ignoring the DF
> bit.
> 
> Kernel commit 22a59be8b7693eb2d0897a9638f5991f2f8e4ddd ("net: ipv4:
> Add ability to have GRE ignore DF bit in IPv4 payloads") is
> complemented by this user-space changeset which exposes control of
> this setting.
> 
> Reviewed-by: Stephen Hemminger <stephen@networkplumber.org>
> Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>

Applied, thanks Philip

  reply	other threads:[~2017-07-21  0:26 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-20 19:06 [PATCH v3] iproute2: add support for GRE ignore-df knob Philip Prindeville
2017-07-21  0:26 ` Stephen Hemminger [this message]
2017-07-21  0:35   ` Philip Prindeville
2017-09-13  3:56     ` Michele Lucini

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