Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!usc!ucsd!ucbvax!hplabs!hp-ses!hpcuhb!hpindda!lmg
From: lmg@hpindda.HP.COM (Lisa Gullicksen)
Newsgroups: comp.protocols.tcp-ip
Subject: Re: SNMP
Message-ID: <6200030@hpindda.HP.COM>
Date: 7 Dec 89 01:58:27 GMT
References: <237@sparta.UUCP>
Organization: HP Information Networks, Cupertino, CA
Lines: 17

> from / chris@sparta.UUCP (Chris Chiotasso) / 10:59 am  Dec  4, 1989 /
>
>
>I read the code and found that the object id's are encoded with the
>first 2 subids in a single subid field using (x*40)+y x=1st subid
>and y=2nd subid.
>
>I have also read the RFC's and have not found any reference to this.
>Am I missing something?  Why are the first 2 ids combined?

The encoding of the first 2 subids in a single subid field as 
(x*40)+y  is described in ISO 8825 "Specification of Basic
Encoding Rules for Abstract Syntax Notation One (ASN.1)" in section
20.4.  Section 20 covers "Encoding of an object identifier value."

Lisa Gullicksen
e-mail: lmg@hpindda.hp.com