Bill,
There are two ways to make Multicast work with CCA right now. (The
problem is CCA's internal router does not currently route Multicast
Packets.)
The Cisco Offically supported way is to run your CAS's in Virtual
Gateway mode. (Since CCA is not the router, it doesn't have to route
the Multicast)
The second way is not "officially supported" but has been used in a few
scenairo's, and we've extensively tested it here. (We're Real-IP
Gateway Mode)
You create an interface, with an IP that doesn't exist on your network
for the VLAN that is being managed. You also make the subnet it's on
only large enough for a single IP. Then Add the multicast commands to
that interface. Apply approriate ACL's so that you can control which
the direciton the traffic flows. (IE, do you want your studnets mailing
up a multicast stream in the dorms?)
The way it works is essentially, it's a hidden router that routes the
multicast traffic to the rest of the network and/or injects it after the
CAS. Since it only has a valid range of one address, which is the
router, student's can't use it as a bypass of CCA. ACL's can further
ensure this. But the Multicast traffic will bypass CCA.
________________________________
From: Bill Cole [mailto:[EMAIL PROTECTED]
Sent: Thursday, November 02, 2006 10:24 AM
To: [email protected]
Subject: Re: [WIRELESS-LAN] Streaming multicast over wireless]
We are currently setting up a pilot with VideoFurnace. We are
using LWAP as well, but are not looking to stream over the wireless
network for a while. This is partially due to the Cisco CCA application
we run to do authentication for our wireless network. As of now
multicast does not work over CCA. It is expected to be fixed in the
future. I would really hesitate to run this over 802.11b/g access points
since all it takes is one b user to drive everyone from 54Mbs to 11Mbs
and really clog up the network unless you really limit the bandwidth you
set up when you encode. 802.11a is a much better choice. I think that
Dartmouth has totally replaced their wireless infrastructure with Aruba
802.11a access points.
Duke University ran a pilot with VideoFurnace over wireless in
their Tower Dorm for a while. You might want to contact them about their
result and density of access points. From my discussions with them they
had used quite a few access points to do the coverage. The point of
contact at Duke is Kevin Miller.
Regards,
Bill Cole
----------------------------------
Bill Cole
Video Network Engineer
North Carolina State University
Communication Technologies/ITD
Campus Box 7208
2114 Avent Ferry Road
Raleigh, NC 27695
Voice: 919.515.0100
Email: [EMAIL PROTECTED]
IP/Video: 152.1.5.156
VideNet/GDS: 00111899195151349
On Nov 2, 2006, at 9:48 AM, Rick Brown wrote:
-------- Original Message --------
Subject: Re: [WIRELESS-LAN] Streaming multicast over wireless
Date: Wed, 1 Nov 2006 20:09:58 -0500
From: Joyce, Todd N <[EMAIL PROTECTED]> <mailto:[EMAIL PROTECTED]>
Reply-To: 802.11 wireless issues listserv
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