Re: [Bluez-users] L2CAP MTU and packet fragmentation?

[Stephen Strowes <sds@dcs.gla.ac.uk>]

Hi,

On Mon, 2006-06-26 at 14:17 +0200, Marcel Holtmann wrote:
> > I could live with the MTU being 64k with no fragmentation, but I seem to
> > get quite a lot of corrupt packets over around 2kB.
> 
> I have no idea what you are talking about. The L2CAP layer is reliable
> and the underlaying ACL link, too.

Sorry, correction, I get a lot of lost packets. I assume either because
they've become corrupted, or perhaps because they never arrive.

I get between 20-40% packet loss with packet sizes around 3000 bytes,
and more loss as packet sizes increase. l2ping says 56% loss at 3500
bytes.

This loss is what prompted my question. This behaviour, actually, is why
I'm using L2CAP -- because it was likened to UDP in what I'd read
previously. Ironically, perhaps, it's just a little *too* lossy  :-)

I'll either bolt on some packet segmentation to my app, or use RFCOMM
for now.


Cheers,
S.



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