Mailing List Archive

Marcin,

it's correct. by default, without igmp snooping, the multicast flows are
broadcasted on a L2 switch.

Did you have put the multicast flow (in entry) on a protected VLAN of EAPS
ring ?

Regards,


Tristan Fauriant




De : Marcin Kuczera <marcin@leon.pl>
A : "extreme-nsp@puck.nether.net" <extreme-nsp@puck.nether.net>
Date : 30/12/2013 14:47
Objet : [e-nsp] VLAN without IGMP snooping and multicasts
Envoyé par : "extreme-nsp" <extreme-nsp-bounces@puck.nether.net>



hello,

we have a customer who has some strange devices transmitting "fixed"
multicast stream without using IGMP requests in a regular way.
So we had to turn off IGMP snooping on that vlan, otherwise transmission
was extinguished after IGMP timers expire.
I'am not arguing with these devices, they transmit DVB-T MUX signal in
their own, properitary way.

However, because it passes EAPS ring, I have noticed that this stream is
also broadcasted to backup port of EAPS ring.

So my question is - is it correct that multicasts when IGMP snooping is
off are broadcasted instead of using regular FDB ?

Switches: Summit-X650-24x
Soft: ExtremeXOS version 15.3 series

Regards,
Marcin

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On 2014-01-02 13:58, tfauriant@mousquetaires.com wrote:
> Marcin,
>
> it's correct. by default, without igmp snooping, the multicast flows
> are broadcasted on a L2 switch.

Comming back to the subject.
You are right, it is quite obvious but it took me a moment to get it
understood.

>
> Did you have put the multicast flow (in entry) on a protected VLAN of
> EAPS ring ?

There is no manual configuration.
What will happen if I do it ?
Is it going to do a proper switchover if particular flow is "routed"
manually on protected vlan ?

Regards,
Marcin


>
> Regards,
>
>
> Tristan Fauriant
>
>
>
>
> De : Marcin Kuczera <marcin@leon.pl>
> A : "extreme-nsp@puck.nether.net" <extreme-nsp@puck.nether.net>
> Date : 30/12/2013 14:47
> Objet : [e-nsp] VLAN without IGMP snooping and multicasts
> Envoyé par : "extreme-nsp" <extreme-nsp-bounces@puck.nether.net>
> ------------------------------------------------------------------------
>
>
>
> hello,
>
> we have a customer who has some strange devices transmitting "fixed"
> multicast stream without using IGMP requests in a regular way.
> So we had to turn off IGMP snooping on that vlan, otherwise transmission
> was extinguished after IGMP timers expire.
> I'am not arguing with these devices, they transmit DVB-T MUX signal in
> their own, properitary way.
>
> However, because it passes EAPS ring, I have noticed that this stream is
> also broadcasted to backup port of EAPS ring.
>
> So my question is - is it correct that multicasts when IGMP snooping is
> off are broadcasted instead of using regular FDB ?
>
> Switches: Summit-X650-24x
> Soft: ExtremeXOS version 15.3 series
>
> Regards,
> Marcin
>
> _______________________________________________
> extreme-nsp mailing list
> extreme-nsp@puck.nether.net
> https://puck.nether.net/mailman/listinfo/extreme-nsp
>
> ----------------------------- Disclaimer ------------------------------
> --- Ce message ainsi que les éventuelles pièces jointes constituent une
> correspondance privée et confidentielle à l'attention exclusive du
> destinataire désigné ci-dessus. Si vous n'êtes pas le destinataire du
> présent message ou une personne susceptible de pouvoir le lui délivrer,
> il vous est signifié que toute divulgation, distribution ou copie,
> totale ou partielle, sur un quelconque support de cette transmission
> est strictement interdite. Si vous avez recu ce message par erreur,
> nous vous remercions d'en informer l'expéditeur par téléphone ou de lui
> retourner le présent message, puis d'effacer immédiatement ce message
> de votre systeme. Tout message électronique est susceptible
> d'altération. Le "groupement des Mousquetaires" décline toute
> responsabilité au titre de ce message s'il a été altéré, déformé ou
> falsifié.---
> --- This e-mail and any attachments is a confidential correspondence
> intended only for use of the individual or entity named above. If you
> are not the intended recipient or the agent responsible for delivering
> the message to the intended recipient, you are hereby notified that any
> disclosure, distribution or copying, either whole or partial, in any
> medium of this communication is strictly prohibited. If you have
> received this communication by mistake, please notify the sender by
> phone or by replying this message, and then delete this message from
> your system. E-mails are susceptible of alteration. The
> "Mousquetaires' group" shall not therefore be liable for the message
> if altered, changed or falsified.---
> -----------------------------------------------------------------------
>