Lnf cluster

Italian cluster (Patrizia Rossi, Federico Ronchetti). Below some information:

Connection scheme:

lnf1_eth0 <---> switch
lnf2_ethx <---> switch
lnf3_ethx <---> switch
lnf1_eth1 <---> lnfx_ethx (cross-over cable)
lnf1_eth0 <---> lnfx_ethx (cross_over cable)

Federico Ronchetti wrote:
> Ciao
>
> Seems that the mini-farm network is not setup properly. Here is the scheme
>
> the LNF1 node (NIS server and disk server) has 3 network interfaces.
> the first one is public towards the jlab network the remaining two are
> private and talk to LNF2 and LNF3. In turn LNF2 and 3 have two network
> interfaces each: one public and one private towards LNF1. The
> connection of LNF2 and 3 to LNF1 IS DONE WITH CROSSED CABLES. These
> seem not to be in place or misconnected.
>
> In fact you can see from LNF1:
>
> [root@lnf1 root]# more /etc/hosts
> # Do not remove the following line, or various programs
> # that require network functionality will fail.
> 127.0.0.1       localhost.localdomain   localhost
> 192.168.1.2     lnf2g.jlab.org lnf2g
> 192.168.0.2     lnf3g.jlab.org lnf3g
>
> and
>
> [root@lnf1 root]# ping lnf2g
> PING lnf2g.jlab.org (192.168.1.2) 56(84) bytes of data.
>
> --- lnf2g.jlab.org ping statistics ---
> 2 packets transmitted, 0 received, 100% packet loss, time 1015ms
>
> This was done to avoid cluster traffic on the counting house network.
>
> It's hard to tell where the problem is from here.
>
> federico
>
> On 9/21/07, Serguei Boiarinov <boiarino@jlab.org> wrote:
> > Hi Patrizia,
> >
> > as I told you before, you can login as root only to lnf1.
> > Good news is that FROM lnf1 you can login as root
> > to lnf2 and lnf3, so if something should be fixed it can
> > be done remotely.
> >
> > Access issues have to be resolved between your sysadmin
> > and JLAB computer center, I 'm not a person who involve in
> > those decisions.
> >
> > Regards, Sergey
> > ===================================
> >
> > Patrizia Rossi wrote:
> >
> > > Hi Sergey,
> > >
> > > still we can not access our mini-farm al jlab. What's the problem?
> > >
> > > thank you
> > > patrizia
> > >
> > >   # Patrizia Rossi
> > >   # National co-spokesperson of the italian program in Hall B at JLAB (USA)
> > >   # INFN, Laboratori Nazionali di Frascati - phone/fax +39.06.9403.2549 /2559
> > >   # Jefferson Lab, CLAS Collaboration      - phone/fax +1.757.269.5284 / 6248
> > >   # e-mail:rossi@lnf.infn.it
> > >   #        rossi@jlab.org
> >
> >
> >
>
> --
> _________________________________________
>
> _/ F e d e r i c o  R o n c h e t t i
> \_ I N F N, Laboratori Nazionali di Frascati
> _/ Office Cell Fax:+39.06.9403(2312)(8112)(2559)
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