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
            
            _________________________________________________________________
            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

Blogs and organic groups at http://www.ccie.net
Received on Tue Jan 26 2010 - 08:01:31 ART