[opendtv] Re: Tracking Video Multicast Viewers
- From: Kon Wilms <kon@xxxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Wed, 02 Mar 2005 08:52:11 -0800
You can either:
a. query your routers/managed switches via SNMP and poll the membership
reports on the device (cisco has OIDs for this, nortel too). HP Openview
can query these statistics, or you can write an application to automate
it.
b. modify the client-side application to send a packet to the server on
leave and join (http, etc.). You'll more than likely have to modify an
app (or create a launcher/container app) for this to work.
Cheers
Kon
On Wed, 2005-03-02 at 08:43 -0600, David Devereaux-Weber wrote:
> Here at the University of Wisconsin-Madison, we have built an IP video
> system we call the Digital Academic Television Network
> <http://datn.wisc.edu/>. For the channels we get from the cable TV
> company, we use a locally-scoped IP multicast address. The router
> does not forward these, so they can only be viewed on the campus.
> However, the channel from the Journalism Department uses a
> globally-scoped address, so should be viewable elsewhere on the
> multicast-enabled net.
>
> The benefit of IP multicast is that it scales to large numbers of
> viewers without increasing server or network load. The drawback of IP
> multicast is that the server doesn't know who is watching.
>
> So I am looking for advice: how can we track viewershi of IP multicast video?
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