[p2p-hackers] Optimal UDP Message size for data streaming...

[Saikat Guha]

On Sat, 2006-02-25 at 17:08 -0800, David Barrett wrote:
> And if so, is there truly such variance that it's worth it?  If the
> range is 1472-1500 bytes, it seems like a pointless exercise.  If it's
> 1472-65536 bytes, then it's more interesting.

The problem with MTU is that if you are off-by-1, you risk cutting your
effective bandwidth by a factor of 2, or more. If you peg your app at
1472, and the real MTU is 1471 - every alternate IP packet has 1 byte of
data, and in some cases (certain NATs that don't support fragmented
packets), you lose all connectivity.

Underestimating MTU isn't as bad as overestimating though.

-- 
Saikat
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: This is a digitally signed message part
Url : http://zgp.org/pipermail/p2p-hackers/attachments/20060225/03bef25c/attachment.pgp