From: "Jouni Malinen" <jkm@devicescape.com>
To: Michael Buesch <mb@bu3sch.de>
Cc: Johannes Berg <johannes@sipsolutions.net>,
Jiri Benc <jbenc@suse.cz>,
"John W. Linville" <linville@tuxdriver.com>,
netdev@vger.kernel.org, castet.matthieu@free.fr
Subject: Re: softmac mtu
Date: Thu, 28 Sep 2006 08:45:15 -0700 [thread overview]
Message-ID: <20060928154515.GA9615@instant802.com> (raw)
In-Reply-To: <200609281735.17616.mb@bu3sch.de>
On Thu, Sep 28, 2006 at 05:35:17PM +0200, Michael Buesch wrote:
> On Wednesday 27 September 2006 15:55, Johannes Berg wrote:
> > On Wed, 2006-09-27 at 15:57 +0200, castet.matthieu@free.fr wrote:
> > > Also I wonder what should be the max mtu.
> >
> > 2304, I think, as that's
> > synonym sMaxMsduLng Integer = 2304; /* max octets in an MSDU */
> >
> > But maybe I'm interpreting the spec wrongly?
>
> Yes, I think so. ;)
>
> I am pretty sure this is the maximum _fragment_ size.
> But each packet (which max size is defined by the MTU) can
> be fragmented. I don't know if there's a limit on the max
> number of frags.
No it's not. How about reading the standard.. ;-) Take a look at how
MSDU and MPDU are defined.. MSDU can be fragmented into smaller MPDUs,
but the limit here is indeed for MSDU, not MPDU. In other words,
fragmentation in IEEE 802.11 is different from fragmentation in IP and
it is also used for different purpose.
--
Jouni Malinen PGP id EFC895FA
next prev parent reply other threads:[~2006-09-28 15:45 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-23 17:50 softmac mtu Matthieu CASTET
2006-09-23 21:40 ` Larry Finger
2006-09-23 21:47 ` David Miller
2006-09-23 21:59 ` Larry Finger
[not found] ` <39e6f6c70609231504qd442c59hebf152df00a7af0c@mail.gmail.com>
2006-09-23 22:08 ` Arnaldo Carvalho de Melo
2006-09-23 22:23 ` David Miller
2006-09-25 19:17 ` Matthieu CASTET
2006-09-25 20:01 ` John W. Linville
2006-09-27 12:39 ` Jiri Benc
2006-09-27 13:57 ` castet.matthieu
2006-09-27 13:55 ` Johannes Berg
2006-09-27 17:17 ` matthieu castet
2006-09-28 7:39 ` Johannes Berg
2006-09-28 17:58 ` matthieu castet
2006-09-28 15:35 ` Michael Buesch
2006-09-28 15:45 ` Jouni Malinen [this message]
2006-09-28 15:47 ` Johannes Berg
2006-09-28 16:13 ` Jouni Malinen
2006-09-28 17:02 ` Daniel Drake
-- strict thread matches above, loose matches on Subject: below --
2006-09-23 17:50 Matthieu CASTET
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