[c-nsp] Multicast Issue

Matt McAdory matt at mcadory.info
Thu May 31 00:44:31 EDT 2012


http://www.cardinalpeak.com/blog/?p=1054 is a good explanation of bit
rate measurement process using WS. Use that to validate your expected
8Mbps stream rate. Also validate with your DSLAM operator that the
24Mbps you quote isn't total video and IPTV, but dedicated to video
(or at least dedicated when video is flowing) to get your ~3 streams
worth.

Matt


On Wed, May 30, 2012 at 1:29 AM, Mohammad Khalil <eng_mssk at hotmail.com> wrote:
>
> The downstream is configured to be 24 M but the upstream is configured to be 4M
> this is the current setup , so it is for sure bandwidth issue ?
>
>> From: mark.tinka at seacom.mu
>> To: eng_mssk at hotmail.com
>> Subject: Re: [c-nsp] Multicast Issue
>> Date: Wed, 30 May 2012 08:18:57 +0200
>> CC: cisco-nsp at puck.nether.net
>>
>> On Wednesday, May 30, 2012 08:14:20 AM Mohammad Khalil
>> wrote:
>>
>> > Actually its supposed for each stream to consume 8M
>> > should i try to increase the speed limits configured ?
>>
>> As this is VDSL, are you sure you're actually getting 24Mbps
>> into the house?
>>
>> We tested IPTv on VDSL using new copper across 50m - it was
>> a disaster.
>>
>> If you can, try increasing bandwidth and see if that helps.
>> But it definitely sounds like when you request a 2nd stream
>> and the picture develops block noise, you're starving the
>> link of bandwidth.
>>
>> Mark.
>
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