Re: Use of SAP in a PIM SSM Network

[Dirk Ooms <Dirk.Ooms@alcatel.be>]

Jon Crowcroft wrote:
> 
> In message <200011142316.PAA29744@cisco.com>, Toerless Eckert typed:
> 
>  >>> I am trying to understand in a pure SSM network without any shared tree,
>  >>> how would SAP operate? My understanding is that SAP is transmitting on a
>  >>> shared tree. Does it mean that we always stuck with a PIM-SM shared
>  >>> tree, even in a pure SSM network?
> 
>  >>I think you have a network without a shared tree and without SAP. You can
>  >>of course use SSM to get SAP information, but the receivers need to know
>  >>the address of the sources in the first place, which is a bit beyond the
>  >>point of what SAP was meant for in the first place. SAP is nice to have
>  >>in limited environments, but simply trying to broadcast directory information
>  >>on a world-wide scale is not a scaling solution. Already today lots of
>  >>SDP sessions are just made available via the web instead of SAP.
> 
> Toerless
> 
> either you have a well known ssm mcast addr per sap server 

but the 'sap listener' application requires some changes, it has to join
a specific sap server (which again needs to be listed on a webpage?). 
anyone working on sdr for ssm-only networks?

dirk