Re: NOOB: Multicasting over Unicast WAN Connections

On Wed, 18 Jan 2006 20:51:17 -0800, Bill Weber <interos@xxxxxxxxxxx>
wrote:

>So I'm new and I've been reading the links here to see if I can find
>this questions asked before. Please pardon me if I missed it.
>
>I have data centers separated by moderate WAN connections.
>
>My desire is to place a live video stream at location A and multicast it
>to clients in location A. No problem.
>
>Enter my Boss. He wants the same live video feed to magically appear at
> location B. I can't source the feed at location B except for pulling
>a unicast feed from location A, but I want to multicast it to clients in
>location B.
>
>My goal is to unicast the live video feed from location A WMS server to
>location B WMS server and then multicast it from location B WMS to
>clients at location B. I know Cisco calls this smallcast, but I haven't
>seen an equivalent config for WMS.

I think you just want to look at proxying. There's lots of info in the
online help for WMS about that.

If you look in the publishing point's config pane, you can source from
(encoder / file / network source) etc : There are selections for
"remote publishing point" and "multicast stream", you could
potentially use with of those for the source at location B, streaming
from location A.

If you can't guarantee multicast from A to B (eg you don't have a VPN
or other arrangement) probably you should be looking at the "remote
publishing point" option.

Try to point the server at the http:// path to Client A then arrange
for multicast on that server / publishing point. You might want to
check out the documentation to see what behaviour will occur if stream
A is unavailable when you start server B - perhaps some rollover will
be needed.

I'd use http rather than specifying mms because it's going to use TCP
which is a reliable transport - you don't want to rely on the
vagueries of the internet to carry your UDP stream to the proxy
server.

HTH
Cheers - Neil



> Media Encoder
> |
> v
>Client A<-----(Multicast)-----WMS A-----(Unicast WAN)
>
> (Unicast WAN)-----WMS B-----(Multicast)-----Client B
>
>Any suggestions?
>
>Bill Weber
>interZZZos@xxxxxxxxxxx
>
>remove the uppercase ZZZ from my email to send directly.

.

Relevant Pages
Loading