RE: IGMPv3 EXCLUDE filter Source problem

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 <[email protected]> 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
    
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