From: McCallum, Robert (robert.mccallum@thus.net)
Date: Mon Feb 27 2006 - 17:14:44 GMT-3
Also Bidir traffic travels in both directions along the tree instead of
only "up" the tree.
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> Behalf Of CCIEin2006
> Sent: 27 February 2006 18:25
> To: Bob Sinclair
> Cc: ccielab@groupstudy.com
> Subject: Re: Difference between Bidirectional PIM and PIM Sparse Mode
>
> Hi Bob,
>
> Since the first hop routers forward the traffic whether its
> wanted or not, isn't that like dense mode?
>
> Do receivers still send joins to the RP?
>
> What does the RP do with the traffic if there are no
> receivers - send a prune?
>
> Thanks!
>
> On 2/27/06, Bob Sinclair <bob@bobsinclair.net> wrote:
> >
> > Bidirectional PIM Differs from Sparse mode in at least these ways:
> >
> > Bidir does not maintain any (S,G) state. Only (*,G) state.
> This is
> > what makes it scalable for many-to-may multicast.
> >
> > Bidir does not do PIM registration. First-hop routers do
> not register
> > traffic with the RP. First hop routers, forward traffic for active
> > groups toward the RP, whether anyone wants the traffic or
> not, as long
> > as the
> group
> > is active.
> >
> > Since there is no PIM registration, the RP does not
> actually have to
> > be a reachable address, only a reachable network that acts
> as a root.
> >
> > Here is a link with more info:
> >
> >
> >
> http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/product
> s_configuration
> _guide_chapter09186a00800ca796.html
> >
> >
> > HTH,
> >
> > Bob Sinclair
> > CCIE #10427, CCSI 30427
> > www.netmasterclass.net
> >
> >
> > ----- Original Message -----
> > *From:* CCIEin2006 <ciscocciein2006@gmail.com>
> > *To:* ccielab@groupstudy.com
> > *Sent:* Monday, February 27, 2006 11:28 AM
> > *Subject:* Difference between Bidirectional PIM and PIM Sparse Mode
> >
> >
> > Hello group,
> >
> > I am not very clear on the differences between
> Bidirectional PIM and
> > PIM Sparse Mode. Both use the RP and switchover to shortest
> path tree
> > after the first packet is received, correct?
> >
> > How do they differ exactly?
> >
> >
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