Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!unido!rsp!tom
From: tom@rsp.UUCP (Thomas Ruf)
Newsgroups: comp.sys.novell
Subject: Re: IPX corruption possible across routers
Message-ID: <1056@rsp.UUCP>
Date: 5 Jun 91 08:13:38 GMT
References: <1991Jun3.142905.29531@aio.jsc.nasa.gov> <1991Jun3.212342.4603@npd.Novell.COM>
Organization: RSP Datensysteme, W-Germany
Lines: 29

timm@Sed.Novell.COM (Tim Myers) writes:

>You've been talking to those IP-on-the-backbone-or-bust bigots again,
>haven't you?
>Software CRCs are redundant since Ethernet interface cards do it for you in
>hardware.  IPX was designed to NOT waste any time computing redundant CRCs.

Ha Ha Ha ! Ethernet CRC is just that: a link level checksum. It does NOT
cover:
	RAM errors in routers
	Software problems in routers
	Link Errors in OTHER medias between Etherent segments
I'd rather have my CPU spent some cycles checking end-to-end checksums
as in tcp/ip than blindly trust all those fancy boxes moving bits over
the ocean. 

>Our drivers don't. If your drivers do then go get a new driver.
>Senior Software Consultant
>Novell, Inc.
If your consultant doesn't recommend end-to-end checksums, go get another
consultant :-)

Cheers,
Thomas , inventor of IPX over UDP/IP, of course with NO WAY of
turning off UDP checksums.

-- 
Thomas Ruf	tom@rsp.de	Schneider & Koch GmbH	Schneider & Koch, Inc
{uunet,mcvax}!unido!rsp!tom	Germany			Palo Alto