RE: PIM BIDIR

From: David Prall <dcp_at_dcptech.com>
Date: Tue, 26 Jan 2010 08:46:42 -0500

With all of the non-english speaking individuals that make up groupstudy I
find it funny we can even think about proper English grammar.

Now back to BiDir PIM. Can anyone tell me how you provide for RP redundancy
in a BiDir environment, using static RP configuration?

David

--
http://dcp.dcptech.com
> -----Original Message-----
> From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
> Scott Morris
> Sent: Tuesday, January 26, 2010 8:02 AM
> To: Joe Astorino
> Cc: ron.wilkerson_at_gmail.com; Carlos G Mendioroz; David Prall; Hans
> None; ccielab_at_groupstudy.com
> Subject: Re: PIM BIDIR
> 
>  I find it more ironic that a list just full of wonderful grammar
> lesson
> candidates decides to take the time to actually worry about this one!
> IMHO, I would not consider Joe to be one of the "big offenders".
> 
> ;)
> 
> Joe Astorino wrote:
> 
>   OK -- I find it "interesting" that David and I thought of the same
>   thing.  Jesus Christ...
> 
>   On Tue, Jan 26, 2010 at 7:48 AM,    <ron.wilkerson_at_gmail.com>
> wrote:
> 
>     Carlos is questioning your use of the word ironic and rightfully
> so.  Very cool that gs provides grammar lessons here and there.  :)
> 
>     -----Original Message-----
>     From: Joe Astorino     <jastorino_at_ipexpert.com>    Date: Tue, 26
> Jan 2010 07:15:33
>     To: Carlos G Mendioroz    <tron_at_huapi.ba.ar>    Cc: David Prall
> <dcp_at_dcptech.com>    ; Hans None    <acsyao_at_hotmail.com>    ;
> <ccielab_at_groupstudy.com>    Subject: 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
> 
>     --
>     Regards,
> 
>     Joe Astorino CCIE #24347 (R&S)
>     Sr. Technical Instructor - IPexpert
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Received on Tue Jan 26 2010 - 08:46:42 ART

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