Newsgroups: comp.parallel.pvm
From: Kenneth_Jaskowiak@ccmail.ed.ray.com (Kenneth R Jaskowiak)
Subject: Re: real broadcast or multicast
Organization: Raytheon Company
Date: Sun, 04 Feb 1996 08:40:19 -0500
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Message-ID: <Kenneth_Jaskowiak-0402960840190001@mmc42.ed.ray.com>

In article <4etf9h$ar4@usenet.srv.cis.pitt.edu>, Donald Krieger
<don@neuronet.pitt.edu> wrote:

>         We are using PVM on a group of more than 50 workstations,
> almost all of which are on an Ethernet local area network.  A real
> broadcast would really work here since the Ethernet is like a bus.
> Has anyone written or seen such a thing.  By a real broadcast, I
> mean a message which is sent on the Ethernet which has the appropriate
> bits set so that all listeners get it rather than just the one
> to which it is addressed.  Thanks for any help.
> 
>                                         Don Krieger

You can do either full broadcasts or "limited" broadcasts by configuring
each workstation and network router, and by sending messages to the
appropriate IP address.  For example, if all workstations are in the same
Class C subnet and there are no routers between the workstations, then
a UDP message sent to IP address w.x.y.255 could be received by all
workstations.  Processing of the received messages would depend on the
port number used, other processes running on the workstations, etc.

I don't know if PVM supports this form of messaging.

Ken Jaskowiak
Principal Engineer
Raytheon Company

