Re: IGMPv3 EXCLUDE filter Source problem

Thank you for your response.  I read section 6.3 couple of times.  I understand that multicast router will make the decision on wether to forward traffic?  Here the source timer we are referring is in EX -SRC timer.  
   
  Lets see an example of Router R and client C.  If the multicast client wants to avoid SRC-A it will keep sending membership reports with EX-SRC-A to Router R.  So, the EX-SRC-A timer will never get expired as long as Client C sends membership reports.  Unfortunately, it keep receiving traffic and  No other client on this network wants SRC-A.
   
  So, in this configuration, where is the " least one system desires the source"?  Does this mean Multicast router made the decision to forward traffic overiding IGMP information?  Can you please explain?
   
  Thank you

mighty <[email protected]> wrote:
  "TIMER > 0" refers to "Source Timer Value", and section 6.2.3 of RFC
3376 explains that

If a source record has a running timer with a router filter-mode for
the group of EXCLUDE, it means that at least one system desires the
source. It should therefore be forwarded by a router on the network.

On 6/5/07, tech engr wrote:
>
> Hi,
>
> I looked up the RFC and i am bit confused now. RFC says EX and Timer > 0 then, suggest to forward traffic from source. If this is the case, why do we need to define EX - SOURCE mode? what is the purpose of EX - SOURCE group record? Can you please explain?
>
> Thank you
> Steven
>
> ________________________________
From: mighty [mailto:[email protected]]
> Sent: Tuesday, June 05, 2007 2:29 PM
> To: John Zwiebel
> Cc: [email protected]
> Subject: Re: [magma] IGMPv3 EXCLUDE filter Source problem
>
>
>
> section 6.3 of RFC 3376, "IGMPv3 Source-Specific Forwarding Rules", outlines the forwarding suggestions the IGMP module should make to the multicast router. in the case of EXCLUDE group record with source records, the table reads:
>
> Group
> Filter-Mode Source Timer Value Action
> ----------- ------------------ ------
>
> EXCLUDE TIMER > 0 Suggest to forward traffic
> from source
>
> EXCLUDE TIMER == 0 Suggest to not forward
> traffic from source
> (DO NOT remove record)
>
>
>
> On 6/5/07, John Zwiebel wrote:
> >
> >
> > You might have more luck if you talk to the cisco IOS folks.
> >
> >
> > However, ask yourself how you would translate an EXCLUDE to a PIM join/prune message
> > And qualify that by remembering that the emphasis for IGMPv3 deployment is for SSM.
> >
> >
> > Then consider implementation vs the protocol.
> >
> >
> > Finally, think about a real world scenario where you'd want to receive
> > everything except a specific source.
> >
> >
> > If you really have a case where this is required, then you might want to tell
> > the IOS folks that their implementation isn't meeting your requirements.
> >
> >
> > On Jun 5, 2007, at 10:28 AM, tech engr wrote:
> >
> >
> > Hi,
> >
> > Can anyone help me with this ?
> >
> > Steven
> >
> > tech engr < [email protected]> wrote:
> >
> > Hi,
> >
> > I tried to use EXCLUDE - SOURCE option in our cisco 6400 with IOS ver 12.3. Using IXIA tester I sent EXCLUDE - SOURCE with ip 10.6.37.2 in multicast group 239.1.1.144. I have the video server running behind the Cisco router on 10.6.37.2. We expect the video should not be forwarded to IXIA from 10.6.37.2. But, It is getting forwarded.
> >
> > Then, I looked into cisco igmp groups and it says EX group 239.1.1.144 and src 10.6.37.2. Cisco is adding multicast route for this group but, it is not excluding src 10.6.37.2 . Have you folks ever used EX-SRC option? Can you please let me know if you guys ever able make this work?
> >
> > Thanks
> > Steven
> > ________________________________
Sucker-punch spam with award-winning protection.
> > Try the free Yahoo! Mail Beta._______________________________________________
> > magma mailing list
> > [email protected]
> > https://www1.ietf.org/mailman/listinfo/magma
> >
> >
> >
> > ________________________________
Get the free Yahoo! toolbar and rest assured with the added security
of spyware protection.
> > _______________________________________________
> > magma mailing list
> > [email protected]
> > https://www1.ietf.org/mailman/listinfo/magma
> >
> > _______________________________________________
> > magma mailing list
> > [email protected]
> > https://www1.ietf.org/mailman/listinfo/magma
> >
> >
>
>
>
> ________________________________
Get your own web address.
> Have a HUGE year through Yahoo! Small Business.
>
> ________________________________
Moody friends. Drama queens. Your life? Nope! - their life, your story.
> Play Sims Stories at Yahoo! Games.
>
>
>
>


       
---------------------------------
Park yourself in front of a world of choices in alternative vehicles.
Visit the Yahoo! Auto Green Center.

_______________________________________________
magma mailing list
[email protected]
https://www1.ietf.org/mailman/listinfo/magma