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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hi,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>The problems you are experiencing appear
to firewall problems. To use our bridge, you need to open UDP ports
10000-10999 incoming and outgoing. I am not sure what the problem is with
bridging in the lobby. You can try to go to the “AGSC Test Room” from “AGSC
Rooms”. This should have a video and audio stream, with looped back audio
(everything you say comes back to you) and video (your video is displayed in
the Test Room video stream). If you can’t see this, try opening the firewall
as above.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>This is also likely to be the problem you
have on your own venue server. Looking at your config, you will need to open UDP
ports 40000 – 60000 incoming and outgoing.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>If you are happy to have everyone bridged,
then you can run your own bridge server on a non-multicast network I think.
You just need to make sure that everyone selects “Use Unicast” when they use
the server.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Andrew </span></font><font size=2
color=navy face=Wingdings><span style='font-size:10.0pt;font-family:Wingdings;
color:navy'>J</span></font><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'><o:p></o:p></span></font></p>
<div>
<p><font size=2 color=navy face="Times New Roman"><span style='font-size:10.0pt;
color:navy'>============================================<br>
Access Grid Support Centre,<br>
RSS Group,<br>
<st1:place w:st="on"><st1:City w:st="on">Manchester</st1:City></st1:place>
Computing,<br>
<st1:place w:st="on"><st1:PlaceName w:st="on">Kilburn</st1:PlaceName> <st1:PlaceType
w:st="on">Building</st1:PlaceType></st1:place>,<br>
<st1:place w:st="on"><st1:PlaceType w:st="on">University</st1:PlaceType> of <st1:PlaceName
w:st="on">Manchester</st1:PlaceName></st1:place>,<br>
<st1:Street w:st="on"><st1:address w:st="on">Oxford Road</st1:address></st1:Street>,<br>
<st1:place w:st="on"><st1:City w:st="on">Manchester</st1:City></st1:place>,<br>
M13 9PL,<br>
<st1:place w:st="on"><st1:country-region w:st="on">UK</st1:country-region></st1:place><br>
Tel: +44(0)161-275 0685<br>
Email: <st1:PersonName w:st="on">Andrew.Rowley@manchester.ac.uk</st1:PersonName></span></font><o:p></o:p></p>
</div>
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face="Times New Roman"><span style='font-size:12.0pt'>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> owner-<st1:PersonName
w:st="on">ag-tech@mcs.anl.gov</st1:PersonName> [mailto:owner-<st1:PersonName
w:st="on">ag-tech@mcs.anl.gov</st1:PersonName>] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Fabrizio.Berdondini@prototipo.it<br>
<b><span style='font-weight:bold'>Sent:</span></b> 13 May 2006 17:11<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">Andrew.Rowley@manchester.ac.uk</st1:PersonName><br>
<b><span style='font-weight:bold'>Cc:</span></b> <st1:PersonName w:st="on">ag-tech@mcs.anl.gov</st1:PersonName>;
owner-<st1:PersonName w:st="on">ag-tech@mcs.anl.gov</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [AG-TECH] Venues
Addresses: infrastructural question, CHANGED TO: Bridging Problems</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><br>
</span></font><font size=2 face=sans-serif><span style='font-size:10.0pt;
font-family:sans-serif'>Hello Andrew,</span></font> <br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>thank
you for reply, as always clear and useful to me. The scenario you prospected to
me is right the one I was thinking about as a "workaround" to the
multicast problem. For this reason I first tried to configure a BridgeServer
onto my VenueServer machine, but as far as now I'm still having some problems. </span></font><br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>Here
is a description of what's happening.</span></font> <br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>First
of all, the VenueServer runs onto a dual-boot (XP Pro - SUSE 10) machine,
located at an externally visible IP 213.209.222.50. I first tried to configure
server and an experimental bridge for XP, so I created, following instructions
found on AG portal, a BridgeServer.cfg file, with the following structure:</span></font>
<br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>----------------------------</span></font>
<br>
[BridgeServer]<br>
name = AGserver1<br>
location = ReS<br>
qbexec = c:\programmi\AGtk2.4\bin\QuickBridge.exe<br>
BRIDGESERVER = AGserver<br>
portMin = 40000<br>
portMax = 60000 <o:p></o:p></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'>#
VenueServer<br>
[<a href="https://213.209.222.50:8000/VenueServer">https://213.209.222.50:8000/VenueServer</a>]<br>
type = VenueServer <o:p></o:p></span></font></p>
<p><font size=3 face="Times New Roman"><span style='font-size:12.0pt'># Centro
Monitoraggio Pazienti<br>
[<a href="https://213.209.222.50:8000/Venues/default">https://213.209.222.50:8000/Venues/default</a>]<br>
type = Venue <br>
</span></font><font size=2 face=sans-serif><span style='font-size:10.0pt;
font-family:sans-serif'>------------------------------------------------</span></font>
<br>
<br>
<br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>I
tried to mutually exclude the bridging of the Venue or that of the VenueServer.
In both cases, however, even if the bridge seems running, it doesn't do his
job: if 2 users connect their client to the bridged venue they are able to
switch to unicast mode choosing the bridge server, but after that each one can
see only audio/video that comes out from his machine, no audio/video from the
other. Is there something misconfigured into my .cfg?</span></font> <br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>Second
question: i tryed to connect my 2.4 client to the venue:</span></font> <br>
<br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>https://ag2server.ag.manchester.ac.uk/Venues/default</span></font></tt>
<br>
<br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>then
tried to switch to Unicast, the msgbox for let me choose a bridge raised up and
I selected:</span></font> <br>
<br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>AGSC/Manchester</span></font>
<br>
<br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>but
after that I got the following error:</span></font> <br>
<br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>"Use
Unicast Error"</span></font> <br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>"Stream
Information for selected bridge not found; reverting to previous
selection"</span></font> <br>
<br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>Only
some more internal venue allowed me to use unicast with a bridge, but
connecting to it with a fellow of mine who enabled unicast too, we are unable
to get audio/video streams: each one of us seems to be the only audio/video
stream inside the venue.</span></font> <br>
<br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>As
always thank you for your support,</span></font> <br>
<font size=2 face=sans-serif><span style='font-size:10.0pt;font-family:sans-serif'>Faber
B.</span></font> <br>
<br>
<br>
<br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>owner-<st1:PersonName
w:st="on">ag-tech@mcs.anl.gov</st1:PersonName> scritti il 12/05/2006 13.40.20</span></font></tt><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><br>
<br>
<tt><font face="Courier New">> Hi,</font></tt></span></font> <br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>> </span></font></tt>
<br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>> I am
not sure if it is possible to tunnel an entire venue server.</span></font></tt>
<br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>> </span></font></tt>
<br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>> What
would be useful would be to have a bridge server hosted on a </span></font></tt><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><br>
<tt><font face="Courier New">> multicast enabled network. This bridge
server would allow you to </font></tt><br>
<tt><font face="Courier New">> use the venue client in “unicast” mode.
This would make a unicast </font></tt><br>
<tt><font face="Courier New">> connection to the bridge server and then the
bridge server would </font></tt><br>
<tt><font face="Courier New">> make the multicast connection.</font></tt></span></font>
<br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>> </span></font></tt>
<br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>> You are
welcome to use the AGSC venue server just now to try this out (</span></font></tt><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><br>
<tt><font face="Courier New">>
https://ag2server.ag.manchester.ac.uk/Venues/default). This is an </font></tt><br>
<tt><font face="Courier New">> AGTk version 2.4 venue server, but we are
bringing an experimental </font></tt><br>
<tt><font face="Courier New">> AGTk 3.0 server on line within a week
(hopefully). All venues on </font></tt><br>
<tt><font face="Courier New">> our server are bridged, although it is worth
noting that this is </font></tt><br>
<tt><font face="Courier New">> still running as a “best efforts” server in
that we try our best to </font></tt><br>
<tt><font face="Courier New">> keep it running at all times, but don’t
guarantee that it is.</font></tt></span></font> <br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>> </span></font></tt>
<br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>> If this
works out, there may be scope for adding more venues, </span></font></tt><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><br>
<tt><font face="Courier New">> although I will have to speak to my team here
to see if this is </font></tt><br>
<tt><font face="Courier New">> possible. In this case, we would need a
set of multicast addresses </font></tt><br>
<tt><font face="Courier New">> that you would want to use for the venues
anyway – we don’t have any</font></tt><br>
<tt><font face="Courier New">> spare ones to use.</font></tt></span></font> <br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>> </span></font></tt>
<br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>> I don’t
think there are any specific requirements to set up </span></font></tt><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><br>
<tt><font face="Courier New">> multicast routing, but I am not an expert in
this field. I would </font></tt><br>
<tt><font face="Courier New">> guess that you need your router, and every
router between yours and </font></tt><br>
<tt><font face="Courier New">> another multicast router to be multicast
enabled. I would then </font></tt><br>
<tt><font face="Courier New">> think that each router needs to know about
the other multicast </font></tt><br>
<tt><font face="Courier New">> routers, although this may be done using a
protocol, I am not too sure.</font></tt></span></font> <br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>> </span></font></tt>
<br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>> Let me
know if I can help any more,</span></font></tt> <br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>> </span></font></tt>
<br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>> Andrew J</span></font></tt>
<br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>>
============================================</span></font></tt><font size=2
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><br>
<tt><font face="Courier New">> Access Grid Support Centre,</font></tt><br>
<tt><font face="Courier New">> RSS Group,</font></tt><br>
<tt><font face="Courier New">> <st1:City w:st="on"><st1:place w:st="on">Manchester</st1:place></st1:City>
Computing,</font></tt><br>
<tt><font face="Courier New">> <st1:place w:st="on"><st1:PlaceName w:st="on">Kilburn</st1:PlaceName>
<st1:PlaceType w:st="on">Building</st1:PlaceType></st1:place>,</font></tt><br>
<tt><font face="Courier New">> <st1:place w:st="on"><st1:PlaceType w:st="on">University</st1:PlaceType>
of <st1:PlaceName w:st="on">Manchester</st1:PlaceName></st1:place>,</font></tt><br>
<tt><font face="Courier New">> <st1:City w:st="on"><st1:place w:st="on">Oxford</st1:place></st1:City>
Road,</font></tt><br>
<tt><font face="Courier New">> <st1:City w:st="on"><st1:place w:st="on">Manchester</st1:place></st1:City>,</font></tt><br>
<tt><font face="Courier New">> M13 9PL,</font></tt><br>
<tt><font face="Courier New">> <st1:country-region w:st="on"><st1:place
w:st="on">UK</st1:place></st1:country-region></font></tt><br>
<tt><font face="Courier New">> Tel: +44(0)161-275 0685</font></tt><br>
<tt><font face="Courier New">> Email: <st1:PersonName w:st="on">Andrew.Rowley@manchester.ac.uk</st1:PersonName></font></tt></span></font>
<br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>> </span></font></tt><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><br>
<tt><font face="Courier New">> From: Fabrizio.Berdondini@prototipo.it
[mailto:Fabrizio.</font></tt><br>
<tt><font face="Courier New">> Berdondini@prototipo.it] </font></tt><br>
<tt><font face="Courier New">> Sent: 12 May 2006 09:08</font></tt><br>
<tt><font face="Courier New">> To: <st1:PersonName w:st="on">Andrew.Rowley@manchester.ac.uk</st1:PersonName></font></tt><br>
<tt><font face="Courier New">> Cc: <st1:PersonName w:st="on">ag-tech@mcs.anl.gov</st1:PersonName></font></tt><br>
<tt><font face="Courier New">> Subject: RE: [AG-TECH] Venues Addresses:
infrastructural question</font></tt></span></font> <br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>> </span></font></tt>
<br>
<tt><font size=2 face="Courier New"><span style='font-size:10.0pt'>> </span></font></tt><font
size=2 face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New"'><br>
<tt><font face="Courier New">> Thank you very much Andrew, </font></tt><br>
<tt><font face="Courier New">> quite clear right now.... </font></tt><br>
<tt><font face="Courier New">> </font></tt><br>
<tt><font face="Courier New">> And now the question is... </font></tt><br>
<tt><font face="Courier New">> </font></tt><br>
<tt><font face="Courier New">> We are studying the development of an
infrastructure for reasearch </font></tt><br>
<tt><font face="Courier New">> purposes focused on domiciliar monitoring of
patients with </font></tt><br>
<tt><font face="Courier New">> Alzheimer's desease, leaving in islands or
difficult to reach areas.</font></tt><br>
<tt><font face="Courier New">> It will be developed in collaboration with
the Italian Ministry Of </font></tt><br>
<tt><font face="Courier New">> Health and other public structures, such as
ISS (Istituto Superiore </font></tt><br>
<tt><font face="Courier New">> Sanità). We thought to base it onto the
AccessGrid infrastructure. </font></tt><br>
<tt><font face="Courier New">> Thus we would need to have a couple of
VenueServers connected to the</font></tt><br>
<tt><font face="Courier New">> Mbone in order to provide connectivity via
Multicast for each </font></tt><br>
<tt><font face="Courier New">> videoconference dedicated machine at
patient's home and for a </font></tt><br>
<tt><font face="Courier New">> central "<st1:place w:st="on"><st1:PlaceName
w:st="on">Call</st1:PlaceName> <st1:PlaceType w:st="on">Center</st1:PlaceType></st1:place>",
connected, again via videoconference </font></tt><br>
<tt><font face="Courier New">> dedicated machines, to some
caregivers'/medicians' houses/hospitals. </font></tt><br>
<tt><font face="Courier New">> Would it be possible, and eventually how, to
"tunnell" our </font></tt><br>
<tt><font face="Courier New">> VenueServer(s) in order to link it/them to
the Mbone? How, and which</font></tt><br>
<tt><font face="Courier New">> pre-requisites are needed in order to
require/gain access to the </font></tt><br>
<tt><font face="Courier New">> Mbone infrastructure? </font></tt><br>
<tt><font face="Courier New">> Thank you, as always, for your support, </font></tt><br>
<tt><font face="Courier New">> Faber B. </font></tt><br>
<tt><font face="Courier New">> </font></tt><br>
<tt><font face="Courier New">> "Andrew A Rowley" <<st1:PersonName
w:st="on">Andrew.Rowley@manchester.ac.uk</st1:PersonName>> scritti il </font></tt><br>
<tt><font face="Courier New">> 11/05/2006 12.44.34</font></tt><br>
<tt><font face="Courier New">> </font></tt><br>
<tt><font face="Courier New">> > Hi, </font></tt><br>
<tt><font face="Courier New">> > </font></tt><br>
<tt><font face="Courier New">> > As far as I understand it: </font></tt><br>
<tt><font face="Courier New">> > 1) The IP is a real multicast IP, with
global scope. </font></tt><br>
<tt><font face="Courier New">> > 2) I think <st1:place w:st="on">Argonne</st1:place>
has reserved the IPs that they use with IANA. If</font></tt><br>
<tt><font face="Courier New">> > you want to run a venue server, I would
advise you do the same, or </font></tt><br>
<tt><font face="Courier New">> > use your GLOP space. At the AGSC
we only use static addresses. The</font></tt><br>
<tt><font face="Courier New">> > server keeps track of the IPs in use
internally – no talking is done</font></tt><br>
<tt><font face="Courier New">> > between servers. </font></tt><br>
<tt><font face="Courier New">> > 3) This is standard multicast routing.
Vic and rat communicate </font></tt><br>
<tt><font face="Courier New">> > directly with other vics and rats once
they are running – the only </font></tt><br>
<tt><font face="Courier New">> > use the venue server to get the
addresses (unless you are using </font></tt><br>
<tt><font face="Courier New">> > unicast, in which case there is a bridge
somewhere in the middle. </font></tt><br>
<tt><font face="Courier New">> > This bridge takes your unicast traffic
and forwards it to multicast,</font></tt><br>
<tt><font face="Courier New">> > and vice versa). </font></tt><br>
<tt><font face="Courier New">> > 4) Multicast address routing works
differently from unicast address </font></tt><br>
<tt><font face="Courier New">> > routing. Basically, your router
must be multicast enabled to allow </font></tt><br>
<tt><font face="Courier New">> > multicast to work from outside the
router. It is possible that it </font></tt><br>
<tt><font face="Courier New">> > will allow multicast to work inside the
LAN without this, but I am </font></tt><br>
<tt><font face="Courier New">> > not too sure. Your network card
will respond to both the 192 </font></tt><br>
<tt><font face="Courier New">> > address assigned to it, and multicast
addresses, provided it has </font></tt><br>
<tt><font face="Courier New">> > “joined” the multicast group i.e. it has
sent and IGMP message to </font></tt><br>
<tt><font face="Courier New">> > the router saying that it wants to joint
the group and receive </font></tt><br>
<tt><font face="Courier New">> > traffic addressed to that group. </font></tt><br>
<tt><font face="Courier New">> > </font></tt><br>
<tt><font face="Courier New">> > There may be some things that are not
quite right in the above, but </font></tt><br>
<tt><font face="Courier New">> > I’m sure someone on the list will
correct me if this is the case. </font></tt><br>
<tt><font face="Courier New">> > </font></tt><br>
<tt><font face="Courier New">> > Andrew J </font></tt><br>
<tt><font face="Courier New">> >
============================================</font></tt><br>
<tt><font face="Courier New">> > Access Grid Support Centre,</font></tt><br>
<tt><font face="Courier New">> > RSS Group,</font></tt><br>
<tt><font face="Courier New">> > <st1:City w:st="on"><st1:place w:st="on">Manchester</st1:place></st1:City>
Computing,</font></tt><br>
<tt><font face="Courier New">> > <st1:place w:st="on"><st1:PlaceName
w:st="on">Kilburn</st1:PlaceName> <st1:PlaceType w:st="on">Building</st1:PlaceType></st1:place>,</font></tt><br>
<tt><font face="Courier New">> > <st1:place w:st="on"><st1:PlaceType
w:st="on">University</st1:PlaceType> of <st1:PlaceName w:st="on">Manchester</st1:PlaceName></st1:place>,</font></tt><br>
<tt><font face="Courier New">> > <st1:Street w:st="on"><st1:address
w:st="on">Oxford Road</st1:address></st1:Street>,</font></tt><br>
<tt><font face="Courier New">> > <st1:City w:st="on"><st1:place w:st="on">Manchester</st1:place></st1:City>,</font></tt><br>
<tt><font face="Courier New">> > M13 9PL,</font></tt><br>
<tt><font face="Courier New">> > <st1:country-region w:st="on"><st1:place
w:st="on">UK</st1:place></st1:country-region></font></tt><br>
<tt><font face="Courier New">> > Tel: +44(0)161-275 0685</font></tt><br>
<tt><font face="Courier New">> > Email: <st1:PersonName w:st="on">Andrew.Rowley@manchester.ac.uk</st1:PersonName>
</font></tt><br>
<tt><font face="Courier New">> > </font></tt><br>
<tt><font face="Courier New">> > From: owner-<st1:PersonName w:st="on">ag-tech@mcs.anl.gov</st1:PersonName>
[mailto:owner-<st1:PersonName w:st="on">ag-tech@mcs.anl.gov</st1:PersonName>] </font></tt><br>
<tt><font face="Courier New">> > On Behalf Of
Fabrizio.Berdondini@prototipo.it</font></tt><br>
<tt><font face="Courier New">> > Sent: 11 May 2006 08:29</font></tt><br>
<tt><font face="Courier New">> > To: <st1:PersonName w:st="on">ag-tech@mcs.anl.gov</st1:PersonName></font></tt><br>
<tt><font face="Courier New">> > Subject: [AG-TECH] Venues Addresses:
infrastructural question </font></tt><br>
<tt><font face="Courier New">> > </font></tt><br>
<tt><font face="Courier New">> > </font></tt><br>
<tt><font face="Courier New">> > Hello all, </font></tt><br>
<tt><font face="Courier New">> > while trying to resolve some troubles in
our internal subnet </font></tt><br>
<tt><font face="Courier New">> > configuration, I was wondering how
*exactly* the VenueServer </font></tt><br>
<tt><font face="Courier New">> > assigns/manages addresses for the
venues. What I know, from official</font></tt><br>
<tt><font face="Courier New">> > documentation and from Thomas D. Uram
messages inside this m/list, </font></tt><br>
<tt><font face="Courier New">> > is that the management of the IP for the
venues can be either static</font></tt><br>
<tt><font face="Courier New">> > or dynamic, meaning that I can assign a
fixed IP to each venue (one </font></tt><br>
<tt><font face="Courier New">> > for video, one for audio, and it will
have always the same) or let </font></tt><br>
<tt><font face="Courier New">> > the venueserver assign the IPs inside a
variable range, giving them </font></tt><br>
<tt><font face="Courier New">> > to audio/video of a venue when the first
user asks to enter it, </font></tt><br>
<tt><font face="Courier New">> > while releasing them when the last person
into the venue leaves it. </font></tt><br>
<tt><font face="Courier New">> > What I'm not able to understand is: </font></tt><br>
<tt><font face="Courier New">> > </font></tt><br>
<tt><font face="Courier New">> > 1) is the IP assigned to audio/video for
each room a *real* IP (a </font></tt><br>
<tt><font face="Courier New">> > multicast IP publicly visible over the
internet i mean) or is there </font></tt><br>
<tt><font face="Courier New">> > some kind of alias/routing sistem
underlying somewhere? </font></tt><br>
<tt><font face="Courier New">> > 2) In the first case, how can the venue
server understand a </font></tt><br>
<tt><font face="Courier New">> > particular IP is "free" or
"used" by someone else (i.e. another </font></tt><br>
<tt><font face="Courier New">> > venueserver or another service)? </font></tt><br>
<tt><font face="Courier New">> > 3) In the second case, how is the
routing done? How can the </font></tt><br>
<tt><font face="Courier New">> > venueserver address the two applications
Vic and Rat (with some kind</font></tt><br>
<tt><font face="Courier New">> > of DNS i guess) to the right IP? </font></tt><br>
<tt><font face="Courier New">> > 4) Again in the second case, how can the
VenueServer assign/manage </font></tt><br>
<tt><font face="Courier New">> > addresses in ranges like 224.xxx.xxx.xxx
when the allowed IPs inside</font></tt><br>
<tt><font face="Courier New">> > a LAN are restricted to a range that
goes from 192.168.2.10 to </font></tt><br>
<tt><font face="Courier New">> 192.168.2.150? </font></tt><br>
<tt><font face="Courier New">> > </font></tt><br>
<tt><font face="Courier New">> > I'm not sure if I could explain clearly
what I'm looking for, but </font></tt><br>
<tt><font face="Courier New">> > this matter, as far as now, is very
critical to me, I'm ready to </font></tt><br>
<tt><font face="Courier New">> > give any further clarification and open
to every suggestion and </font></tt><br>
<tt><font face="Courier New">> information. </font></tt><br>
<tt><font face="Courier New">> > Thanx as always, </font></tt><br>
<tt><font face="Courier New">> > Faber B. </font></tt></span></font><o:p></o:p></p>
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