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From: GKN%OAK.SAINET.MFENET@LLL-MFE.ARPA
Newsgroups: mod.computers.vax
Subject: node 1026
Message-ID: <8602021214.AA03157@ucbvax.berkeley.edu>
Date: Fri, 31-Jan-86 23:35:00 EST
Article-I.D.: ucbvax.8602021214.AA03157
Posted: Fri Jan 31 23:35:00 1986
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Date:    Fri, 31-JAN-1986 23:37 EST
To:      info-vax@sri-kl.arpa
Message-ID: <[OAK.SAINET.MFENET].81D43280.008E9DFC.GKN>
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        From:   Arpa%"AWalker@RED.RUTGERS.EDU" 31-JAN-1986 10:12
        Subj:   Another interesting one
        Date:   28 Jan 86 06:09:11 EST
        Message-ID: <12178807774.2.AWALKER@RED.RUTGERS.EDU>

        ...I've run across entries in netserver.log of the type
        '' connect request received from 1026::"0=USER" which turns
        out to be host 2.

        [...]
        Do host numbers wrap around at 1024, is 2 translating to 1026,
        and why would my host be adding extra bits to the incoming host
        number?  In other words, what's going on?

A Phase IV DECnet address looks like this:

        +------+----------+
        ! area !  address !
        +------+----------+
        1      1          0
        5      0

The area number is in the high order 6 bits, and the node address is in
the low order 10 bits.  Your node 2 is in area 1, which accounts for the
1024 bias you see in the node address.

gkn