Ethereal-dev: Re: [ethereal-dev] Another xdlc bug

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From: Guy Harris <gharris@xxxxxxxxxxxx>
Date: Sun, 26 Sep 1999 12:31:19 -0700
> According to http://www.acacia-net.com/Clarinet/protocol.htm LLC
> Unnumbered frames are not extended. Extended LAPB does the same : it
> uses the extended frame structure for Information and Supervisory
> frames, but not for Unnumbered frames.

Not surprising - extended frames exist to provide a bigger transmit and
receive windows, but U frames are datagrams and don't include a window.