Re: MTU over 1500 on WLAN ?

David Balazic <[email protected]> Thu, 29 Jun 2006 15:50:36 +0200
Newsgroups gmane.linux.linux-wlan.user
Message-ID <[email protected]>
Quoting Solomon Peachy <[email protected]>:

> 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.

No I can't. That's why I'm asking.

ifconfig ra0 mtu 2000

returns an error (for all value over 1500).
Don't have the exact error message here, sorry.

This is with a ralink 2500 chipset (PCI card).
OS is Ubuntu 6.06.

Is this becasue of the driver ?
Or ifconfig limitation ?

Regards,
David

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