A. see section 6.4 for the prescribed actions on source timers during
> 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 <
mighty.fine@...> 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:
mighty.fine@...]
> > Sent: Tuesday, June 05, 2007 2:29 PM
> > To: John Zwiebel
> > Cc:
magma@...
> > 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 <
engqry@...> 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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> > >
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> > >
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> > >
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> > >
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> > >
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> > >
> >
> >
> >
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