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Article #689Re: Peculiar Ethernet packets (type 0x6002)
From: Ed Gould
Date: Tue, 23 Apr 1985 20:11
Date: Tue, 23 Apr 1985 20:11
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1338 bytes
> I could see three types of packets going past. One came from the
> rwho daemon (IP Type 0x800, UDP Type 0x11, Port 0x201) and one
> had type field 0x806 and was clearly the Address Resolution Protocol.
> However, the third type of packet had a type field of 0x6002 and
> is a complete mystery. Can anyone tell me what it is?
It's a trailer packet. The real header is at the end. This is a
non-standard addition to IP, used on VAXen to avoid extra data
copies when the data is otherwise page-aligned. Transmission
of trailer packets can be disabled by
/etc/ifconfig <interface> -trailers
if desired.
--
Ed Gould mt Xinu, 739 Allston Way, Berkeley, CA 94710 USA
{ucbvax,decvax}!mtxinu!ed +1 415 644 0146
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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site mtxinu.UUCP Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!vax135!cornell!uw-beaver!tektronix!zehntel!dual!unisoft!mtxinu!ed From: ed@mtxinu.UUCP (Ed Gould) Newsgroups: net.lan Subject: Re: Peculiar Ethernet packets (type 0x6002) Message-ID: <357@mtxinu.UUCP> Date: Tue, 23-Apr-85 15:11:57 EST Article-I.D.: mtxinu.357 Posted: Tue Apr 23 15:11:57 1985 Date-Received: Thu, 25-Apr-85 08:28:13 EST References: <320@cheviot.UUCP> Organization: mt Xinu, Berkeley, CA Lines: 17