From: Joerg Roedel <joro-lkml@zlug.org>
To: Andi Kleen <ak@suse.de>
Cc: David Miller <davem@davemloft.net>,
jbglaw@lug-owl.de, kaber@trash.net, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org
Subject: Re: [PATCH 00/03][RESUBMIT] net: EtherIP tunnel driver
Date: Mon, 25 Sep 2006 14:35:25 +0200 [thread overview]
Message-ID: <20060925123525.GE23028@zlug.org> (raw)
In-Reply-To: <200609251416.15738.ak@suse.de>
On Mon, Sep 25, 2006 at 02:16:15PM +0200, Andi Kleen wrote:
> On Monday 25 September 2006 13:57, Joerg Roedel wrote:
> > On Mon, Sep 25, 2006 at 12:22:41PM +0200, Andi Kleen wrote:
> >
> > > How would you convince those old LAN games to use a MTU < 1500 which
> > > is needed for the tunnel? I bet they have the size hardcoded.
> >
> > The tunnel provides an MTU of 1500. To guarantee this, it never sets the
> > DF flag in outgoing packets.
>
> This means it will multiply all full sized packets. That sounds horrible.
Yes, all full sized packets gets fragmented at the IP layer according to
the MTU of the physical device. As I know, this is the only way to
guarantee the full Ethernet MTU on the tunnel device. This guarantee is
required for layer 3 protocols that does not know the concept of a path
MTU (as used by some old LAN based games ;-)
And for some cases this procedure is also defined in RFC 2473, section
7. for "Generic Packet Tunneling in IPv6".
Joerg
next prev parent reply other threads:[~2006-09-25 12:35 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-23 12:07 [PATCH 00/03][RESUBMIT] net: EtherIP tunnel driver Joerg Roedel
2006-09-23 12:13 ` Jan-Benedict Glaw
2006-09-23 12:27 ` Joerg Roedel
2006-09-23 12:38 ` jamal
2006-09-23 13:27 ` Joerg Roedel
2006-09-25 1:07 ` Valdis.Kletnieks
2006-09-25 8:32 ` Joerg Roedel
2006-09-25 20:49 ` Brian Haley
2006-09-23 23:35 ` David Miller
2006-09-25 8:18 ` Joerg Roedel
2006-09-25 10:22 ` Andi Kleen
2006-09-25 11:57 ` Joerg Roedel
2006-09-25 12:16 ` Andi Kleen
2006-09-25 12:35 ` Joerg Roedel [this message]
2006-09-23 12:13 ` [PATCH 01/03] net: EtherIP driver, header and MAINTAINERS changes Joerg Roedel
2006-09-23 12:16 ` [PATCH 02/03] net/bridge: add support for EtherIP devices Joerg Roedel
2006-09-24 4:01 ` Stephen Hemminger
2006-09-25 8:24 ` Joerg Roedel
2006-09-25 14:40 ` Stephen Hemminger
2006-09-25 14:54 ` Joerg Roedel
2006-09-23 12:20 ` [PATCH 03/03][IPROUTE2] EtherIP tunnel and device support for iproute2 Joerg Roedel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20060925123525.GE23028@zlug.org \
--to=joro-lkml@zlug.org \
--cc=ak@suse.de \
--cc=davem@davemloft.net \
--cc=jbglaw@lug-owl.de \
--cc=kaber@trash.net \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).