Re: Joining Multicast Networks of differeing Types

From: Cisco-Engineer.com Team (ciscosurplus@gmail.com)
Date: Tue Feb 12 2008 - 13:13:50 ARST

Sounds very feasable, will this still work where the network is several hops
away? would it not fail and RFP check?

Source--DMR--DMR--SMR--SMR--Receiver

----Network A -------- | --------- Network B -------

I tried in a lab using static Mroutes at the AS edge, but no dice, if on the
edge router one interface has dense-mode, then the other has sparse-mode,
then I issue an explicit join via the ip igmp join command will this work?
Time to hed back to the lab..

On 12/02/2008, Joseph Brunner <joe@affirmedsystems.com> wrote:
>
> I would think your goal should only be to run the sparse mode network long
> enough to get to the where the dense mode network joins... and you can get
> there via a static join...
>
> Once at the dense mode network, simply have joins at all the client lan
> sender interfaces, to again bring the feed along... you can just keep
> bringing it everywhere you want with static joins... which pim will be
> more
> than obliged to keep joining rpf decided paths back to the sparse
> mode/dense
> mode router.
>
> What do you think?
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> graham@cisco-engineer.com
> Sent: Tuesday, February 12, 2008 3:35 AM
> To: 'Graham Clarke'; 'Cisco certification'
> Subject: RE: Joining Multicast Networks of differeing Types
>
> No bites on this one ;). Is it possible to use a DVMRP implementation to
> act
> as a conversion?
>
> From what I gather on a cisco router DVMRP can't be enabled, you have to
> enable PIM then it senses a DVMRP network and falls back. Will a DVMRP
> tunnel between two cisco routers using different pim methods fall back to
> DVMRP?
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Graham Clarke
> Sent: 11 February 2008 11:43
> To: Cisco certification
> Subject: OT: Joining Multicast Networks of differeing Types
>
> Hello group,
>
> I have a question about joining differing multicast networks together. Is
> there some method to for example join a PIM-DM to a PIM-SM network, ie
> have
> a router terminate a stream and re-stream it (or convert it).
>
> And no using the pim-spare-dense mode command isnt going to cut it! there
> are Firewalls which only allow SM and GRE tunneling through them is not an
> option.
>
> So picture the scenario - Network A is exlcusively Sparse-mode with
> statically defined RPs, Network B is a dense mode network, A user on
> Network
> A wants to join a feed on Network B, Network B is outside Network A
> configuration control. Can this realistically be achieved?
>
>
> --
> Thanks
>
> Graham Clarke
>
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-- 
Thanks

Graham Clarke

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