Re: MTU over 1500 on WLAN ?

On Wed, Jun 28, 2006 at 09:52:22AM +0200, David Balazic wrote:
> WLAN packets are supposedly about 2300 bytes long, but usually
> the user data size is about 1500 bytes.
> Is the difference 2300-1500 some kind of protocol overhead ?
> Could MTU larger than 1500 be used ?

The only reason to clamp the MTU at 1500 bytes is that people typically 
have 802.11 networks bridged with wired networks, which have an MTU of 
1500.  If you're doing pure wireless-wireless (eg in an adhoc situation) 
you can crank the MTU up higher, if so desired.  

Also, if you're routing rather than bridging, you can get away with a
larger MTU, if only because the routers generally do the right thing,
fragmenting the frames if necessary.

 - 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)

_______________________________________________
Linux-wlan-user mailing list
[email protected]
http://lists.linux-wlan.com/mailman/listinfo/linux-wlan-user

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.1 (GNU/Linux)

iD8DBQFEo9W4hinxHf95MjYRAkOjAJ9gUmNbir23JGIsdKWuET1fBq6nDwCgp9pe
r2q1LpIaBieUf+Sss/6KNnA=
=6llU
-----END PGP SIGNATURE-----