[e2e] Internet packet size distribution

Bill Sommerfeld sommerfeld at sun.com
Tue Nov 8 16:17:07 PST 2005

> None of the 1300B packets seen in our Los Nettos and USC Internet2 traces
> seem to be tunneled IPv6. The protocol field is almost always 6 (TCP)  or
> 17 (UDP). It's never 41 (IPv6).

One of my coworkers reports, regarding a common VPN package:

"upon installation of the product, the software changes the global MTU
to 1300 in the registry for each interface. "

so this mystery may be solved; if you've ever even install this package,
your MTU will remain small..

						- Bill

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