Re: PIM BIDIR

Yep , just saying it was ironic how David and I thought of the same thing.

On Tue, Jan 26, 2010 at 7:06 AM, Carlos G Mendioroz <tron_at_huapi.ba.ar> wrote:
> Where is the irony ?
> Networks are graphs, and when you need a cycle free set of arcs (links)
> that connect all the nodes (routers/switches) you are looking for
> a spanning tree. It's all already defined in mathematics, and we
> are reusing already defined terms :) (thanks God we did not reinvent
> the wheel once !!!)
>
> Dijkstra was never thinking of cisco when he did SPF algo either.
>
> -Carlos
>
> Joe Astorino @ 25/01/2010 21:09 -0300 dixit:
>> It will forward up to the RP via the DF interface. Ironically I sort
>> of think about it like spanning-tree too. The DF is sort of like your
>> designated port -- It is the best path up to the RP. So the multicast
>> starts sending and hits a router, and goes UP the multicast tree
>> (hence the bi-dir term) towards the RP via the DF interface. Once the
>> RP gets the information it will be sent DOWN the shared tree to
>> receivers.
>>
>> On Mon, Jan 25, 2010 at 3:55 PM, David Prall <dcp_at_dcptech.com> wrote:
>>> Based on what interface the multicast packet was received on. The RP sets
>>> the root of the tree and that is all in BiDir. I like to think of BiDir as
>>> Spanning-Tree for IP Multicast, with the RP being the root.
>>>
>>> --
>>> http://dcp.dcptech.com
>>>
>>>
>>>> -----Original Message-----
>>>> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
>>>> Hans None
>>>> Sent: Monday, January 25, 2010 3:47 PM
>>>> To: ccielab_at_groupstudy.com
>>>> Subject: PIM BIDIR
>>>>
>>>> All,
>>>>
>>>>
>>>>
>>>> When a non RP router received a mcast packet, where should the router
>>>> forward
>>>> the packet? Toward the RP or toward the mcast group OIL?
>>>>
>>>>
>>>> My question is, how will a non RP router pin point its own position?
>>>> Whether
>>>> it was in the path from the source to RP or from RP to the destination
>>>> group?
>>>>
>>>>
>>>>
>>>> Thanks,
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> Hans
>>>>
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>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>
> --
> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
>

-- 
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