Re: MTU over 1500 on WLAN ?

Solomon Peachy <[email protected]> Fri, 30 Jun 2006 09:39:15 -0400

Newsgroups	gmane.linux.linux-wlan.user
Message-ID	<[email protected]>

On Thu, Jun 29, 2006 at 03:50:36PM +0200, David Balazic wrote:
> No I can't. That's why I'm asking.
> 
> ifconfig ra0 mtu 2000

Yeah, but that's not linux-wlan-ng/prism2, which doesn't have this
limitation.

Other chipsets may or may not impose MTU limitations, but according to
802.11 the max frame length is 2336 bytes, including the full 802.11
header and FCS, leaving 2312 bytes for the payload.  (well, technically
2310 bytes if you're using QoS/802.11e/WME, and encryption overhead may
eat up to 16 more bytes -- So call it 2294 bytes max payload, worst
case..)

 - Solomon
-- 
Solomon Peachy                        [email protected]
AbsoluteValue Systems                 http://www.linux-wlan.com
721-D North Drive                     +1 (321) 259-0737  (office)
Melbourne, FL 32934                   +1 (321) 259-0286  (fax)

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