Re: PIM BIDIR

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
>
>
>
>
>
>
>
>

-- 
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