This is correct, but I wanted to clarify a couple of things. LAM/MPI
requires full connectivity between all nodes in the LAM runtime
environment. That means that the N1, N2, and N3 in your example can only
communicate with each other if the two gateways in the middle are
configured to allow communication between networks. So, in addition to N1
being able to talk to N2, N1 must be able to communicate directly with N3.
There are a number of ways of setting this up, but that is probably beyond
the scope of this mailing list. You would probably be better off finding
a network engineer at your location.
If you have some type of firewalling between the networks, you are also
probably in trouble. It is not enought to be able to rsh/ssh between
nodes. The network also has to be configured to allow communication
between arbitrary high-numbered TCP and UDP ports.
Hope this helps some,
Brian
On Wed, 18 Sep 2002, Roberto Pasianot wrote:
>
> Hi Ivan,
>
> I can't see any reason why you woldn't be able jump over as many
> gateways as you want.
> If you can "rsh" between machines then you can boot lam and that's it.
> Of course, you need to have the routing tables properly set up, but this
> is not lam responsibility.
>
> Cheers,
>
> Roberto
>
> On Wed, 18 Sep 2002, [iso-8859-1] Iván Tejera Santana wrote:
>
> > Hi everybody,
> > It´s the first time I am sending a mail here.My
> > question is the following:
> >
> > Network1---gateway---Network2---gatewaty---Network3
> >
> > Can I boot lam-mpi using the configuration showed??
> >
> > I have got the system works with this configuration:
> >
> > Network1---gateway---Network2
> >
> > The main node of the Lam-mpi system is located just
> > where the gateway is.
> >
> > Obviosly, I have complete connectivity in that
> > configuration, but what happens if I want to introduce
> > a new network like in the figure:
> >
> > N1---gateway----N2---gateway----N3
> > ---main node--
> >
> > it doesn´t work because there is not total
> > connectivity between main node where I boot lamboot
> > and nodes from network N3, in spite of I can do ping
> > between all of them.
> >
> > I am studying telecommunications at Las Palmas
> > University, and it is very important for me to know if
> > it is possible or no??
> >
> > It is very urgent because I must to deliver my proyect
> > and I can not do it while don´t resolve this problem.
> >
> > Thanks forward
> >
> > _______________________________________________________________
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> > _______________________________________________
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> >
>
> _______________________________________________
> This list is archived at http://www.lam-mpi.org/MailArchives/lam/
>
--
Brian Barrett
LAM/MPI developer and all around nice guy
Have a LAM/MPI day: http://www.lam-mpi.org/
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