[AG-TECH] Use AG on LAN

[Ivan R. Judson]

Hi,

A couple of points of clarification:

1) You said, two machines with the following:

Machine A: (windows xp)
	- display

Machine B: (fedora core)
	- audio
	- video producer

	- venue server

2) local network (via cross-over cable)

This is correct, right?

Given this setup, I think you can safely ignore most of the issues Andrew
has mentioned, because you have a venue server, and in fact, multicast on a
local segment *always* works -- that's the trick of rendezvous, it's only
when you go off the local network that you run into the issues Andrew
pointed out.

I think the biggest problem I see is that you won't be able to leverage any
of the common infrastructure. 

- You'll need to request certificates, retrieve them and then install them
mostly manually. 
- You don't have to worry about the addressing issue, you should read a
multicast primer, there are a lot of issues that *can* be a problem, but
most of the time none *are* a problem in a trivial configuration. You can
check this out: http://www.multicasttech.com/multicast_faq.html, but you
probably want a less technical introduction.
- You'll need your machines time synched, and if you want to use hostnames
instead of IP addresses, you'll them both to know about each other (you
don't have outside DNS in your setup).

If you run into more problems, please do send email, someone is always
around to help out :-)

--Ivan 


> -----Original Message-----
> From: owner-ag-tech at mcs.anl.gov 
> [mailto:owner-ag-tech at mcs.anl.gov] On Behalf Of Andrew Rowley
> Sent: Friday, March 04, 2005 3:35 AM
> To: 'Giosuè'; ag-tech at mcs.anl.gov
> Subject: RE: [AG-TECH] Use AG on LAN
> 
> Hi,
> 
> I am assuming that you want to test without connecting to a 
> real network i.e. the only network in this test will be the 
> cross-over cable.  In this case, you will probably not be 
> able to connect to a venue server and therefore you will also 
> need to run this on one of your machines.
> 
> Multicast will probably not work on this private network as 
> there is no router to configure.  Multicast relies on routers 
> to set up the multicast using IGMP.  You will have broadcast 
> but not multicast.  If you do not know if you have multicast 
> set up on your local router, you probably don't.
> 
> To communicate with multicast, you do not change your 
> machines' IP addresses.  Instead you just specify a multicast 
> address to send to and receive from.  This should send 
> messages to your router to tell it that you want to join the 
> multicast channel.  Therefore, just specify some multicast IP 
> addresses in the venue management tool.
> 
> Andrew :)
> 
> ============================================
> Access Grid Support Centre,
> RSS Group,
> Manchester Computing,
> Kilburn Building,
> University of Manchester,
> Oxford Road,
> Manchester,
> M13 9PL,
> UK
> Tel: +44(0)161-275 0685
> Email: Andrew.Rowley at manchester.ac.uk 
> 
> -----Original Message-----
> From: owner-ag-tech at mcs.anl.gov 
> [mailto:owner-ag-tech at mcs.anl.gov] On Behalf Of Giosuè
> Sent: 03 March 2005 18:23
> To: ag-tech at mcs.anl.gov
> Subject: [AG-TECH] Use AG on LAN
> 
> I'm Giosuè a student of Computer Science Department of the 
> University of Bari - Italy - and i'm working with Access Grid 
> 2.3 for my thesis "Building and Setting of a Node for Access Grid". 
> 
> Have some questions about "How install and configure an 
> Access Grid Node".
> 
> I must to do a test with 2 PC, an is Windows XP Home machine 
> while the another is a Fedora Core 3, where both run AG 2.3.
> My department has for me only this machines, where i linked 
> their with a cross cable.
> Windows XP machine has IP address 192.168.0.1 and Fedora has 
> 192.168.0.2, subnet mask is 255.255.255.0 like a normal private LAN.
> Will run on Win XP only display service and on Fedora runs 
> "audio" and "video producer service" and "venue server".
> 
> My questions are?
> 
> 1. Is possible to create an Access Grid Node with this LAN 
> configuration?
> 
> 2. If possible what can i do for building a node? Is 
> multicast actived?
>    
> 3. If add a venue (e.g. TestRoom) into "Venue Management" in 
> the "Addressing tab" is required a IP multicast address for 
> video e audio stream, therefore i must change ip address 
> machine 192.168.0.1 into 224.0.0.1 (Win XP machine) and 
> 192.168.0.2 into 224.0.0.2 (Fedora machine) for example. Is 
> correct this procedure? If wrong, what do i do?
> 
> I read all document about AG, but my case is different.
> For example when i required a valid certificate for each 
> services i have used like valid name machine 
> "root.localhost.localdomain".
> I tried to use "venue client" to connect at 
> https://venues.ncsa.uiuc.edu:9000/Venues/default and AG work fine.
> 
> Can you give me some suggestion?
> 
> Tank yours support.
> 
> Computer Science Department - University of Bari (Italy) 
> (www.di.uniba.it) Giosuè Vizzuso
> e-mail: coordinate at virgilio.it
> 
> 
> 
>