[AG-TECH] Listing Venue Server addresses

Thomas D. Uram turam at mcs.anl.gov
Fri Feb 16 13:25:29 CST 2007


Chris makes a good point, one that I applied when assigning addresses
to the vv3/ivs servers.  The simplifications I applied were to have the
audio and video addresses be sequential, and have the ports always the
same (20000 for audio, 20002 for video).

On 2/16/07 12:16 AM, Christoph Willing wrote:
>
> On 16/02/2007, at 3:16 AM, Derek Piper wrote:
>
> [snip]
>>     While talking about the venue management tool it would be nice to 
>> be able to restrict it to a single IP address for multicast (and just 
>> let it dynamically assign ports). As it is, the mask only allows for 
>> 0-31, where I need '32' in order to lock it down as such. I was given 
>> two addresses but they do not fit within one /31 CIDR range (of 
>> course :>).
>
>
> Derek,
>
> There may be problems for clients when using that strategy (using a 
> single IP, but different ports for different venues) for bandwidth 
> challenged clients. Even when they're only connected to a single 
> venue, the traffic from all the other venues sharing the same IP 
> address would flow to the client as well. A client can filter based on 
> port number, but all other (unwanted) traffic on the same IP address 
> has also arrived regardless of using a different port (only to be 
> filtered out anyway). Using different multicast IP addresses means 
> that only the requested streams flow to the client. In fact, we now 
> configure our server to use different IP addresses for audio & video 
> in the same venue.
>
>
> chris
>
>
>
> Christoph Willing                       +61 7 3365 8350
> QCIF Access Grid Manager
> University of Queensland
>
>
>
>




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