Hi, Andrew
Thanks for your comment , you are right about the design of bridge server. We
quit testing bridge server with 2 interface cards not only the way that bridge
server behaves, but the connection between venue server and bridge server on 2
interface cards is awkard.
By the way, I would like to discuss another bridging design, and be glad to
share your opinion.
We have done tests on one venue serving by a couple of bridge servers, and
won't work as expected(we would like to see if the unicast connections could be
load shared). We built a couple of bridge servers and configured them to serve
a particular venue, so once you choose unicast service, a list of bridge server
would be shown for selection, though some users selected the different
bridges, the users were directed to some particular one.
I know that many venues could be served by just one bridge server, do you
think that AG team member have any intention to enchance load sharing features
as I mentioned above?
Jinshung
----- Original Message -----
From: Andrew Rowley<mailto:[email protected]>
To: 'Jinshung Liu'<mailto:[email protected]>
Cc: [email protected]<mailto:[email protected]>
Sent: Wednesday, January 05, 2005 6:15 PM
Subject: RE: [AG-TECH] Bridge server with 2 interface cards
Hi,
Sorry, I misunderstood what was happening here.
What could be happening is that the bridge server is listening to multicast
on the network that does not have multicast enabled. I am not sure how you
would go about doing this, but you need the unicast part of the bridge server
to listen on one network card and the multicast part to listen on the other
network card. So far as I know, the current bridge server (Quickbridge) only
listens on one network card (which this is I am uncertain). I expect that if
you use the multicast card by default, this might work. Otherwise, it will
probably require a modification of the source code of quickbridge to allow the
choosing of a different network card for the multicast and unicast sockets.
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: [email protected]
_____
From: Jinshung Liu [mailto:[email protected]]
Sent: 23 December 2004 01:07
To: Andrew Rowley
Cc: [email protected]
Subject: Re: [AG-TECH] Bridge server with 2 interface cards
Andrew,
Thanks very much for your help, but I have another question, a reason that I
set up 2 cards.
We have 2 big networks, one is multicast enabled and the other is not, they
are not interconnected. But some users could access both networks, some users
can only access the network that is not multicast enabled. So these 2
interface cards on Bridge server were designed to help connectting those 2
domain users.
Could you see any resolution ?
Jinshung
----- Original Message -----
From: Andrew Rowley<mailto:[email protected]>
To: 'Jinshung Liu'<mailto:[email protected]> ;
[email protected]<mailto:[email protected]>
Sent: Wednesday, December 22, 2004 6:27 PM
Subject: RE: [AG-TECH] Bridge server with 2 interface cards
Hi,
Often Multicast sockets are set up to "not loopback". This means that
any traffic sent from the local computer is not received at the local computer
again. This is typically true of bridges.
I do not think that you need to set up two separate cards to listen in to
multicast and unicast at the same time. You can only set up one unicast socket
listening on a particular port, but you can usually set up any number of
multicast sockets listening on the same port as the unicast socket.
Hope this helps,
Andrew G D Rowley :)
============================================
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: [email protected]
_____
From: [email protected] [mailto:[email protected]] On
Behalf Of Jinshung Liu
Sent: 22 December 2004 03:18
To: [email protected]
Subject: [AG-TECH] Bridge server with 2 interface cards
Hi
We were trying to build a better AG connection topology, so we intalled 2
network interface cards, where one sits in multicast network domain and the
other in unicast network domain.
But it didn't seem to work, the AG clients from multicast domain can't
join with the AG clients from unicast domain ( the clients using bridge server).
Could you give any suggestion ?
Jinshung Liu
