Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!sdd.hp.com!hp-pcd!hpfcso!rjn
From: rjn@hpfcso.FC.HP.COM (Bob Niland)
Newsgroups: comp.sys.hp
Subject: Re: CLUSTER MYTHS
Message-ID: <7370340@hpfcso.FC.HP.COM>
Date: 16 Mar 91 16:29:19 GMT
References: <1991Mar14.231124.13611@ux1.cso.uiuc.edu>
Organization: Hewlett-Packard/FSY Ft.Collins,CO,USA
Lines: 20

re: > I am trying to bunk or debunk a couple of myths about 
    > HP clusters.  

> 2) Is a second network card really necessary on the server?
>    (The manuals say "yes".  Other people say "no".)

No.  The idea is to keep diskless traffic off your site backbone.  There
are several ways to do this; one is to configure the server as a gateway
machine with two lans (as mine used to be).

You can also:

 * isolate the diskless cluster via a bridge (as our department's is now).
 * have some other non-server/non-client machine on the subnet be a gateway
 * have no site LAN, in which case the issue is moot
 * have a low-usage backbone, "" ""

Regards,                                              Hewlett-Packard
Bob Niland      Internet: rjn@FC.HP.COM               3404 East Harmony Road
                UUCP: [hplabs|hpfcse]!hpfcrjn!rjn     Ft Collins CO 80525-9599