tcpdump mailing list archives

Re: print_llc code question


From: Alexander Dupuy <alex.dupuy () mac com>
Date: Sun, 06 Sep 2009 12:31:24 -0400

Guy Harris writes:

s for non-Ethernet networks using 802.2, RFC 1042, "Standard for the  
transmission of IP datagrams over IEEE 802 networks" replaced that  
scheme with a scheme using SNAP headers with the standard Ethertype  
for IP.

So I don't know who actually *used* an 802.2 header without a SNAP  
header when sending IP datagrams.
  

I believe that HP-UX may have used this Ethernet framing in the 1980s -
they had a fancy version of ARP called HP Probe (I think) that was used
to determine the MAC address and which framing a destination IP address
supported (classic IP/Ethernet - or either 802.2 and/or SNAP encoding) -
so that on a single Ethernet, an HP system could be using both (or all
three?) IP framing type mechanisms.  I don't remember which versions of
HP-UX had this (it was on Motorola 68K CPUs, I think).


@alex

-- 
mailto:alex.dupuy () mac com

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