Re: [Fecframe] Fecframe Digest, Vol 25, Issue 9

Rajiv,

The problem isn't the adaptation, it's the length of the interval.
Colin

On 10 Mar 2008, at 20:15, Rajiv Asati (rajiva) wrote:
> Thanks for expanding it, Marshall.
>
> The cited problem is one of the reasons why section 4.1.1 of the
> draft-asati-fecframe-config-signaling-00 includes simpler interval
> definition so as to avoid having SAP to calculate the interval in an
> adaptive manner.
>
> ~~~~~~~~~~~~~
> 4.1.1. Sender Procedure
>
> 	....
>
>    The sender must periodically send the 'SAP announcement' message.
>    This is required so that the receiver doesn't purge the cached
>    entry(s) from the database and doesn't trigger the deletion of FEC
>    Framework configuration information. While the time interval  
> between
>    repetitions of an announcement can be calculated as per the very
>    sophisticated but complex formula explained in RFC2974, the  
> preferred
>
>    and simpler mean is to let the user specify the time interval from
>    the range of 1-60 mins with suggested default being 10 mins. The
>    implementation of signaling protocol should provide the flexibility
>    to the operator to choose the complex method over the simpler  
> method
>    of determining the SAP announcement time interval.
>  ~~~~~~~~~~~~~~~
>
> Cheers,
> Rajiv
>
>> -----Original Message-----
>> From: Marshall Eubanks [mailto:tme@multicasttech.com]
>> Sent: Monday, March 10, 2008 4:06 PM
>> To: Rajiv Asati (rajiva)
>> Cc: Colin Perkins; fecframe@ietf.org
>> Subject: Re: [Fecframe] Fecframe Digest, Vol 25, Issue 9
>>
>>
>> On Mar 10, 2008, at 3:56 PM, Rajiv Asati (rajiva) wrote:
>>
>>> Hi Colin,
>>>
>>> Thanks for the feedback. Could you please provide more context ?
>>
>>  From the jabber logs
>>
>> Colin : SAP is problematic, because its long inter-packet interval
>> interacts
>> poorly with many multicast routing protocols. Have you given any
>> consideration to these problems? This was the reason for the
>> (stalled) IMG work in MMUSIC.
>>
>> Colin : internet-media guides
>>
>> Colin : Problem is that multicast state times about, because SAP
>> sends so infrequently.
>>
>> [he means "times out"]
>>
>> Regards
>> Marshall
>>
>>
>>>
>>> Cheers,
>>> Rajiv
>>>
>>>> -----Original Message-----
>>>> From: Colin Perkins [mailto:csp@csperkins.org]
>>>> Sent: Monday, March 10, 2008 3:39 PM
>>>> To: Rajiv Asati (rajiva)
>>>> Cc: Greg Shepherd; fecframe@ietf.org
>>>> Subject: Re: [Fecframe] Fecframe Digest, Vol 25, Issue 9
>>>>
>>>> On 26 Feb 2008, at 20:06, Rajiv Asati (rajiva) wrote:
>>>>> I would like to request a timeslot (15mins) to present
>> the 'FECframe
>>>>> Config signaling' draft.
>>>>>
>>>>>
>> http://tools.ietf.org/html/draft-asati-fecframe-config-signaling-00
>>>>
>>>> SAP is problematic, because its long inter-packet interval
>> interacts
>>>> poorly with many multicast routing protocols. Have you given any
>>>> consideration to these problems? This was the reason for the
>>>> (stalled) IMG work in MMUSIC.
>>>>
>>>> Cheers,
>>>> Colin [by email, since the jabber doesn't seem to be in use]
>>>>
>>> _______________________________________________
>>> Fecframe mailing list
>>> Fecframe@ietf.org
>>> https://www.ietf.org/mailman/listinfo/fecframe
>>
>>
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-- 
Colin Perkins
http://csperkins.org/

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