[c-nsp] Multicast Issue

[Danail Petrov]

Hi there,

A few questions:

1. What IGMP version is used?
2. What kind is the platform - 65/76 and if so - what modules are used.

If this is an IGMPv3 - there is a well known issue with it. I should search a little for that but S,G channels are not properly snooped by the switch, which results in broadcast manner you described.

BR,
Dani
On Jun 4, 2012, at 12:14 PM, Mohammad Khalil wrote:

> 
> Hi all , thanks for all replies
> Seemingly after i connected a laptop with wireshark , there seem a lot of broadcast which reach as well unused ports 
> Bandwidth supposed to be 5M for each stream requested , so is it possibly CPE ?
> We have configured IGMP quierer on the Core Switch
> 
> BR,
> 
> Date: Sat, 2 Jun 2012 23:25:22 -0700
> From: td_miles at yahoo.com
> Subject: Re: [c-nsp] Multicast Issue
> To: eng_mssk at hotmail.com; matt at mcadory.info
> CC: cisco-nsp at puck.nether.net
> 
> Badly configured QoS perhaps ? 
> 
> What about limitation on how much of the link can be used for multicast ?
> Can you try adding incremental streams in smaller amounts to find at what point you have too much traffic ?
> Have you graphed the usage on the link to verify that the amount of bandwidth being used is indeed what you think it might be ?
> There are about 101 different reasons it could be performing badly, we're sort of just throwing suggestions out there.
> 
> 
> regards,Tony.
> 
> 
>        From: Mohammad Khalil <eng_mssk at hotmail.com>
> To: matt at mcadory.info 
> Cc: cisco-nsp at puck.nether.net 
> Sent: Sunday, 3 June 2012 3:22 PM
> Subject: Re: [c-nsp] Multicast Issue
> 
> 
> Hi , the issue seems not BW issue as according to the specifications , each TV is supposed to consume 5M
> So any ideas?
> 
> BR,
> Mohammad
> 
>> Date: Wed, 30 May 2012 23:44:31 -0500
>> Subject: Re: [c-nsp]
> Multicast Issue
>> From: matt at mcadory.info
>> To: eng_mssk at hotmail.com
>> CC: cisco-nsp at puck.nether.net
>> 
>> 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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> 
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