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IP MPE payload

To: ip-dvb@erg.abdn.ac.uk
Subject: IP MPE payload
From: Patrick Cipiere <Patrick.Cipiere@udcast.com>
Date: Tue, 30 Oct 2001 11:20:33 +0100

extract from ETSI document EN 301 192

> LLC_SNAP_flag: this is a 1-bit flag. If this flag is set to "1" the
> payload carries an LLC/SNAP encapsulated datagram following the
> MAC_address_1 field. The LLC/SNAP structure shall indicate the type of
> the datagram conveyed. If this flag is set to "0", the section shall
> contain an IP datagram without LLC/SNAP encapsulation. 

What about IPv4 vs IPv6?
Any opinions about the way `IP datagram' should be interpreted?

I think that LLC_SNAP_flag == 0 should (must?) be restricted to IPv4
(Ethertype 0x800) and for IPv6 LLC_SNAP_flag == 1 (Ethertype 0x86DD)

Patrick.
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