Re: PIM BIDIR

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
>>>>>
>>>>> _________________________________________________________________
>>>>> Hotmail: Free, trusted and rich email service.
>>>>> http://clk.atdmt.com/GBL/go/196390708/direct/01/
>>>>>
>>>>>
>>>>> Blogs and organic groups at http://www.ccie.net
>>>>>
>>>>> _______________________________________________________________________
>>>>> Subscription information may be found at:
>>>>> http://www.groupstudy.com/list/CCIELab.html
>>>>
>>>> Blogs and organic groups at http://www.ccie.net
>>>>
>>>> _______________________________________________________________________
>>>> Subscription information may be found at:
>>>> http://www.groupstudy.com/list/CCIELab.html
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>
>> --
>> Carlos G Mendioroz <tron_at_huapi.ba.ar> LW7 EQI Argentina
>>
>
>
>
> --
> Regards,
>
> Joe Astorino CCIE #24347 (R&S)
> Sr. Technical Instructor - IPexpert
> Mailto: jastorino_at_ipexpert.com
> Telephone: +1.810.326.1444
> Live Assistance, Please visit: www.ipexpert.com/chat
> eFax: +1.810.454.0130
>
> IPexpert is a premier provider of Classroom and Self-Study Cisco CCNA
> (R&S, Voice & Security), CCNP, CCVP, CCSP and CCIE (R&S, Voice,
> Security & Service Provider) Certification Training with locations
> throughout the United States, Europe and Australia. Be sure to check
> out our online communities at www.ipexpert.com/communities and our
> public website at www.ipexpert.com
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
>
>
>
>
>
>
>

-- 
Regards,
Joe Astorino CCIE #24347 (R&S)
Sr. Technical Instructor - IPexpert
Mailto: jastorino_at_ipexpert.com
Telephone: +1.810.326.1444
Live Assistance, Please visit: www.ipexpert.com/chat
eFax: +1.810.454.0130
IPexpert is a premier provider of Classroom and Self-Study Cisco CCNA
(R&S, Voice & Security), CCNP, CCVP, CCSP and CCIE (R&S, Voice,
Security & Service Provider) Certification Training with locations
throughout the United States, Europe and Australia. Be sure to check
out our online communities at www.ipexpert.com/communities and our
public website at www.ipexpert.com
Blogs and organic groups at http://www.ccie.net