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From: montague@npdiss1.StPaul.NCR.COM (John Montague)
Newsgroups: comp.protocols.tcp-ip,comp.protocols.tcp-ip.ibmpc
Subject: Re: How do you get a ENet Addr?
Keywords: EtherNet, Address
Message-ID: <146@npdiss1.StPaul.NCR.COM>
Date: 25 Jul 90 21:59:33 GMT
References: <488@eng3.UUCP>
Distribution: na
Organization: StPaul
Lines: 31

In article <488@eng3.UUCP> joe@eng3.UUCPJoe LaRocque writes:
>I have been given a 'chance to excell' by my boss. Simply put, how do
>we go about getting a base EtherNet Address assigned to us? I seem to

By this request I believe you mean "How does one obtain an assignment of a
block of Universal LAN addresses?"  These addresses are assigned by the
IEEE Standards Office, 445 Hoes Lane, Piscataway, NJ  08854-4150; there
is a nominal fee ($1000).


>Before I forget....I know that we could get a set of proms from a mfg
>who would take care of the problem for us. Our problem is that the new
>system we are building requires as few surface mount structures as 
>possible, so we will be assigning the EtherNet Address via software.

Universally administered addresses must be uniquely assigned to a single
LAN node.  This normally accomplished by making a permanent address assignment
to a physical assembly in a non-volitile register (NOT battery backed-up RAM).
If you wish to assign addresses through software you should use "locally
administered addresses" which you may choose to be similar to the address
you have permanaently assigned to the hardware, differing only in the
"Address Administration" bit (the second most significant bit in the 48 bit
address: 0= universally administered, 1= locally administered).

Extreem care must be taken to ensure that duplicate addresses NEVER occur on
the network.

John Montague                          W0RUE
Manager, Standards & Architecture
NCR, Network Products Division, St. Paul, MN
john.montague@stpaul.NCR.COM