[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: SSM, RTCP, SAP
well, depends what GRA support is there, but one possibility for
RTCP reports from receivers on an SSM tree is to design a new RTCP
report (with GRA router alert) that is self describing w.r.t
summarising responses routers (like PGM nack aggregation) reporting
a summarised loss bitmap, a highest and lowest loss rate, and so
forth...
In message <3AE007C3.CE356D66@21rst-century.com>, Marshall Eubanks typed:
>>Dear Jon;
>>
>> What did you have in mind ?
>>
>> Marshall
>>
>>Jon Crowcroft wrote:
>>>
>>> what about a GRA solution?
>>>
>>> In message <200104192248.PAA15699@lorenzo-u10.cisco.com>, Lorenzo Vicisano ty
>>> ped:
>>>
>>> >>Marshall,
>>> >>
>>> >>> > I don't know of anything similar for SAP, but I don't think we should
>>> >>> > re-invent an ad-hoc routing protocol just for this. We should either
>>> >>> > use the existing ASM multicast service, if present, or SSM + application
>>> >>> > modifications (e.g. a set of relays that accept unicast SAP messages and
>>> >>> > remulticast them. Relays will have all to listen to each other
>>> >>> > announcements .. ect.. there are scalability concerns but seems feasible).
>>> >>> >
>>> >>>
>>> >>> IMHO this should not be a new protocol - it could easily be handled at the ap
>>> >>>plication layer.
>>> >>> Running these relay's sounds like a commercial matter to me. I would NOT add
>>> >>>any router
>>> >>> type support for this.
>>> >>
>>> >>I had in mind an application-level solution too, no router support:
>>> >>the router support is ASM, where available.
>>> >>
>>> >> Lorenzo
>>> >>
>>>
>>> cheers
>>>
>>> jon
>>
>>--
>>
>> Multicast Technologies, Inc.
>> 10301 Democracy Lane, Suite 410
>> Fairfax, Virginia 22030
>> Phone : 703-293-9624 Fax : 703-293-9609
>> e-mail : tme@on-the-i.com http://www.on-the-i.com
>>
>> Test your network for multicast : http://www.multicasttech.com/mt/
cheers
jon